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.

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/deinstallationA scratch on the top of the faceplateScratches to the finish of the right-hand rack handle Minor delamination 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 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.

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

Unit is not working Selling as is for parts or repair only Plug in and some smoke come out see pictures Not powers on at all as is Please not return or refund will be accepted Everything on pictures are included We buy and sell we don’t do repair so please we try to describe our items our best possible Pictures are part of the description so please see them carefully and make your own conclusion about the item’s Thanks for looking selling as the pictures shown. WHAT YOU SEE IS WHAT YOU GET ABOUT SHIPPING Shipping Within US 48 Continental States Only (No shipping to Puerto Rico ,Alaska or Hawaii ) by Fedex Or USPS Ground according your location with free tracking number and It will be shipped thru the address provided by eBay so please make sure it's right during checkout! Feel free to any questions. About return Not return will be accepted as is ?????TOP SELLER ????? Thanks for your purchased • See other items in our eBay page!!

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

DESCRIPTIONFor parts or not workingBoth in great condition, normal wear. Untested, for parts/repair.Brand:PYRAMIDModel:Pyramid Metronome Model 7Connectivity:WiredType:Bookshelf SpeakersUPC:N/A ***Disclaimer*** All items were donated to Evergreen Goodwill of Northwest Washington with no history or provenance. The auction is for all items pictured. Items may need servicing and/or benefit from a cleaning upon arrival. Please see photos for additional details and feel free to ask questions. PAYMENTSPlease note that your entire order will be canceled by eBay if the oldest item exceeds 7 days without payment. Once an order is canceled, we are unable to re-invoice and the item will be relisted. For a combined shipping invoice, please send us one request within 5 days of winning the first item to avoid cancelation of your entire order. Once a combined invoice has been sent, we are unable to add additional items to the invoice. SHIPPING Local pickup is not available at this time. Interntaional shipping is not available at this time. We offer combined shipping as long as items will ship safely together. Auctions must end within 5 days of each other to be eligible for combined shipping. Please hold off on payment until all auctions have ended then proceed to checkout. Please do not pay for any items individually if you wish to have them combined - they must be paid at the same time. Items listed for flat-rate shipping are not eligible for combined shipping. PO Box addresses will require USPS shipments as FedEx Ground will not deliver. If FedEx is selected we may need to invoice for additional shipping costs.

Used. Good condition

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

Estate item! We also have T9 set listed, these where in a mid century time capsule home , I have no way to test either set, our loss buyers gain, there was no received, just tucked in the back of tv cabinet, It seems all cones are intact, etc, but untested, in used cosmetic condition, also has base blocks that match pictured, but dusty but all pretty good for age! Sold as is as pictured! Thanks! Again!

Dick Sequerra Pyramid Metronome Model 7 Speaker Pair. In very good condition but need cleaning, they smell a little like smoke. What you see is what you get a very nice set of hard to get speakers. Measure 10 1/4 inch by 7 3/4 inch and 5 1/2 inch. Email any questions before bidding. Buyer pays shipping. Thank you for looking at my auction.

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

PLEASE READ ALL BEFORE BIDDING. If your shipping address is a PO Box, please select USPS as the shipping option, this is important.We offer multiple shipping options. Click on see details in the shipping estimate section to see all options. Excellent Day-Sequerra FM Reference.This unit is in excellent working condition.Unit was taken to a local professional Audio technician and tested for proper function.All contacts were cleaned during service.There are no signs of wear on the exterior.Unit will ship in its original, from-the-factory double-box and foam.Not shown is the original, thick, plastic bag which will be over the tuner for shipping.Includes instruction manual and power cord. If your shipping address is a PO Box, please select USPS option for shipping. ***We do our best to declare missing parts and items not included but occasionally we miss things. Included items shown in pictures. Not pictured, not included.*** We offer Combined Shipping: Please wait for invoice before paying for multiple bids.Make Sure To Look @ Our Other Listings & Happy Bidding !!! ReturnsWe do not do returns but we understand the eBay not as described policyWe do our best to fully describe every item that we sell to the best of our ability.Thank You

DESCRIPTIONFor parts or not workingBrand:Dick SequerraModel:Pyramid Metronome Model 7Connectivity:WiredType:Bookshelf SpeakersUPC:N/A ***Disclaimer*** All items were donated to Evergreen Goodwill of Northwest Washington with no history or provenance. The auction is for all items pictured. Items may need servicing and/or benefit from a cleaning upon arrival. Please see photos for additional details and feel free to ask questions. PAYMENTSPlease note that your entire order will be canceled by eBay if the oldest item exceeds 7 days without payment. Once an order is canceled, we are unable to re-invoice and the item will be relisted. For a combined shipping invoice, please send us one request within 5 days of winning the first item to avoid cancelation of your entire order. Once a combined invoice has been sent, we are unable to add additional items to the invoice. SHIPPING Local pickup is not available at this time. Interntaional shipping is not available at this time. We offer combined shipping as long as items will ship safely together. Auctions must end within 5 days of each other to be eligible for combined shipping. Please hold off on payment until all auctions have ended then proceed to checkout. Please do not pay for any items individually if you wish to have them combined - they must be paid at the same time. Items listed for flat-rate shipping are not eligible for combined shipping. PO Box addresses will require USPS shipments as FedEx Ground will not deliver. If FedEx is selected we may need to invoice for additional shipping costs.