When I purchased a Sequerra Model 1 FM tuner many years ago, Dick Sequerra send me glossy photocopies of eight product reviews from Stereo Review, Audio, Modern Hi-Fi and Music, Radio Electronics, The Best, Hi-Fi/Stereo Buyers’ Guide, High Fidelity, etc. This literature was enclosed in a two page color binder, with handwritten mailing address and telephone number. Also included are two seven page color brochures that were folded for mailing purposes. Also included is a photocopy of the owner’s manual. All from a smoke free and pet free environment.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because everyones hearing sense is different. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound level. It is not intended to handle bass sounds, so you will need to have separate Woofers as well as a cross- over circuit in order to get the full range tonality.

Up for sale is a pair of Dick Sequerra Pyramid Met 11 speakers in excellent condition. They are solidly built and sound crisp, musical and coherent with airy highs, intimate mids and unbelievable bass. They are perfect for your stereo or home theater system. All drivers are working perfectly and cabinets are in great cosmetic condition. Stands in the pictures are included. The item(s) will be carefully packed and safe delivery is guaranteed. PayPal is preferred. All items should be paid within 2 days after the auction, unless prior arrangements are made! Shipping cost listed above is for US continental 48 states only and the buyer is subject to additional shipping cost outside the US continental 48 states. International buyers are subject to additional shipping cost per Ebays Global Shipping Program. Thanks for looking and feel free to ask questions!

There are many who say the Sequerra Model 1 is the best FM tuner ever designed, and after hearing it, I think they may be right. This is the rackmount broadcast monitor version, in silver, apparently rarer than other variants of this already-quite-rare tuner. It receives well, the audio quality is fantastic, the CRT panoramic/tuning/vector display works wonderfully, and it is remarkably sensitive: the video showing reception of various stations was taken inside a steel building with the doors closed, and no antenna attached, just a balun. (I have tested numerous radios and FM tuners and have never found one that clearly received these stations in our building with the doors shut, even with an antenna.) We received this tuner in good condition, but it wasnt initially working correctly. It turned on, but the display indicated 189.3 MHz and would not change when tuned. Our technician, a retired EE, inspected, repaired, and improved it; his full notes are below. In summary, he: Repaired the -15v supply by replacing its shorted output filter capacitor, which fixed the tuning problemUsed Deoxit to fix intermittency on the left-side buttonsReplaced the LM301A op-amps with sockets, and plugged in a pair of TL071As (see photo) Replaced the leftmost display digit (an HP smart LED display module) with a spareFixed an unsoldered wire that seemed to be a factory defectReplaced all four #1815 incandescent panel lampsand fabricated a new smoked polycarbonate display panel with milled edges, to replace the original glass, which shattered during disassembly. (Having seen it both before and after the replacement, I can certify that it looks damn good.) The only significant flaws I can notice on the unit are as follows (see photos as well):Minor scuffs on the top rear and sides of the chassis, from ordinary use/installation/de-installationA scratch on the top of the faceplateScratches to the finish of the right-hand rack handle Minor de-lamination of the very bottom of the faceplate backlight diffuser, which is only visible if you look down into the Power and Dolby sections from above and in front.Included are: the original op-amps if you wish to swap them out, and a custom-built wooden shipping protector. Listing notes:Comes with 30-day returns.We can only ship items and respond to messages Monday through Friday, on business days.Please contact us immediately if you have any questions or if there are any issues.Technicians notes, verbatim: 6/23/23 Sequerra Model 1 FM tuner s/n 1117. Component date codes 1974. Belongs to Renew Computers. Display comes on, but is stuck on 189.3 and does not change with the tuning knob. I found the manual and made a jumper for the rear panel accessory jack which connects the tuning potentiometer output to the tuner control voltage input. That did not fix the stuck frequency, but the voltage range at the jumper was 7.2v to 32 volts, which matches what the manual indicates. The accessory jack also has the +15V and -15v supply voltages and the -15V pin read near zero. I removed the bottom cover and was able to find and fix the problem with the -15V supply; the output filter capacitor was shorted. It was an axial cap rated 350 uF 16 V. I replaced it with Nichicon PW, 330 uF 16V. That fixed the tuning problem, and the tuner worked with good clean audio output on both channels. Some of the control buttons on the left side are intermittent, particularly ones controlling the CRT display modes. I removed the button assembly and treated all of the contacts with Deoxit. Working on the buttons gave easy access to the left side circuit board so I removed the original LM301A output op amps and replaced them with high quality sockets, allowing a new owner to easily plug in whatever op amps they like. These op amps place limits on how good the noise and distortion of this tuner can be and much has been written about newer op amps with better characteristics and preferences among them. For now, I put in TL071A’s (see picture). The original LM301A’s are included and if for some reason those, or one of the other types requiring compensation caps are put back in, wire leads into the circuit board are provided so that can be done without having to remove the board. The left most LED display digit was intermittently malfunctioning, displaying either a 1 when it should be blank or vice versa, and occasionally other garbage characters. These are H-P display modules wit built in latch/decoder/driver chip. They are HP 5082-7302. I probed the input pins and proved that the problem was a faulty display module, not the counter circuitry upstream. I replaced it with one I had in stock. I noticed an unsoldered connection of a wire to a feedthrough terminal at one of the sealed units toward the rear of the tuner. This appeared to be a factory defect. I don’t know whether it caused any problems, but I soldered it. One of the #1815 incandescent panel lamps was burnt out, so I replaced all 4 of them with new ones. During the repair process, when the front glass panel was removed, it shattered. New ones are not available, so I made one from smoked polycarbonate plastic. It is the correct dimensions, has been milled on the edges, and is clean and pristine. This is now a clean and fully functional example of this rare and famous FM tuner!

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because everyones hearing sense is different. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound level. It is not intended to handle bass sounds, so you will need to have separate Woofers as well as a cross- over circuit in order to get the full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because everyones hearing sense is different. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound level. It is not intended to handle bass sounds, so you will need to have separate Woofers as well as a cross- over circuit in order to get the full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

DaySequerra is celebrating its 25th anniversary of the launch of its famed FM Reference by announcing an FMR 25 upgrade program for your tuner, available factory-direct for $3800. Overview The FMR 25 upgrade is designed to breath new life into every DaySequerra FM Reference by addressing head-on the two major challenges facing the 25 year-old high performance analog design: Limited life expectancy of its cathode-ray tube (CRT) display used for tuning and audio displays Reduced signal-to-noise performance caused by HD RadioTM OFDM sideband interference, commonly called HD Radio “self-noise”. Other electronic components typically effected by old age, such as incandescent bulbs are also replaced with more modern solutions to extend the FM Reference’s useful life. TFT to the Rescue. To replace the decades-old CRT display, DaySequerra engineers developed a synthesized VHDL file to configure a Xilinx Spartan 6TM Field Programmable Gate Array (FPGA). The analog IF and audio signals are digitized using a 64X oversampling TI Burr-Brown 24-bit, 96 KHz A-D converter; the FPGA then processes each respectively to provide the Tuning and Audio Vector displays. The user-selected display is output to high contrast 480 by 272 pixel ruggedized TFT display with a fast 20 mS response time. The resultant front panel display has more contrast than the original CRT and its blue trace compliments the DaySequerra timeless industrial design. Another benefit to eliminating the CRT is a substantial reduction in internal heat and electrical noise on the ground plane caused by the original high-voltage CRT drive circuitry. Professionally serviced by David Gill.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

Untested Estate Sale Find This pair of Sequerra Laboratories speakers is a rare find for any home audio enthusiast. The sleek black design is sure to complement any decor, and the compatibility with the Pyramid Metronome makes for a powerful sound. These speakers are perfect for anyone looking to elevate their home audio experience.

This pair of Sequerra Laboratories speakers is a rare find for any home audio enthusiast. The sleek black design is sure to complement any decor, and the compatibility with the Pyramid Metronome makes for a powerful sound. These speakers are perfect for anyone looking to elevate their home audio experience.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

I am selling a matched pair (2) of the legendary T-9 Ribbon Tweeters Speakers by Dick Sequerra One speaker works great but the other has lower output volume. I opened the foam grills and examined the inside of both. I cant tell anything wrong. The appearance of both speakers look the same to me (see pictures). I also used multimeter to measure the DC resistance across each sides (front and back on each speaker) of the ribbons; and all four got the same readings of about 0.5-0.6 ohm (see pictures). I am not technical person and cant tell the cause. So, my lower than usual price reflects the condition these speakers are in. Please bid accordingly. One grill has a dent which does not appear to do anything bad. The speakers are in good physical condition too. The cabinets are all good, The sale includes just the two ribbon speakers in the pictures; no manual, box, or any other accessories. Please examine the pictures carefully for they are part of description. I pack well and ship worldwide. Quite heavy for the size.

I am selling a matched pair (2) of the legendary T-9 Ribbon Tweeters Speakers by Dick Sequerra One speaker works great but the other has lower output volume. I opened the foam grills and examined the inside of both. I cant tell anything wrong. The appearance of both speakers look the same to me (see pictures). I also used multimeter to measure the DC resistance across each sides (front and back on each speaker) of the ribbons; and all four got the same readings of about 0.5-0.6 ohm (see pictures). I am not technical person and cant tell the cause. So, my lower than usual price reflects the condition these speakers are in. Please bid accordingly. One grill has a dent which does not appear to do anything bad. The speakers are in good physical condition too. The cabinets are all good, The sale includes just the two ribbon speakers in the pictures; no manual, box, or any other accessories. Please examine the pictures carefully for they are part of description. I pack well and ship worldwide. Quite heavy for the size.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.

The Pyramid Sequerra Loudspeaker T-1 Ribbon Tweeter - A High Quality Audio Speaker That Reaches 40 KHZ and beyond with negligible distortion and no coloration. The remarkable performance of this tweeter springs from the inherent advantages of the ribbon transducer being put to use in a speaker fully, with no design compromises. Basically the ribbon transducer is simple. A thin ribbon of metal is suspended in a powerful transverse magnetic field. The signal current passes through the aluminum ribbon, forcing it to vibrate through the interaction of the current and the magnetic field. The ribbon is the voice coil and the diaphragm. Its 4.5 lb magnet produces a field of 3100 Gauss across the ribbon and although the ribbon is only 0.7 mil thick and has extremely small mass, roughly equivalent to a wavelength of air at 19 KHZ. The fundamental resonance has been put far below the crossover point, at around 100 Hz. When you add the Pyramid T-1 Tweeter to any high-quality loudspeaker system, you will hear detail you never heard before. With Frequency Responses from 3 KHZ, (the lower limit of the ribbon speaker), to 50KHZ are reproduced with low intermodulation and and frequency modulation distortion. It has peakless, resonance-free response over the entire audio range, so the T-1 adds no color of its own to the sound, but simply extends the high-speed range of the system. Highs disperse perfectly over a full 160 degrees in the horizontal plane, for the firmest stereo imaging possible. The Pyramid Model T-1 was aimed for the absolute best. These units have had one owner, who was a mature and responsible stereo enthusiast and can be expected to provide many more years of beautiful sound enjoyment. Please look at the photos carefully and ask any questions, because we provide No surprises satisfaction. FULL DISCLOSURE *** These speakers are designed to provide enhanced sound quality in the mid-to-high range sound, It is not intended to handle bass sounds, so you will need to have Woofers as well in order to get full range tonality.