Audio Research LS17 Tube Preamplifier This preamp is in excellent condition and works flawlessly. It comes with the original remote and power cord. Do not miss out on the chance to own this incredible preamplifier. Check out my other listings. Feel free to ask any questions. I ship items only to buyers with signature required on items above $750.NOTE: Returns not accepted.

Up for sale is an Audio Research LS3B preamplifier. This is a line preamplifier (No phono section). No remote control. The condition is very good both functionally and cosmetically. This unit comes with manual and shipping box. Buyer pays for shipping.

AUDIO RESEARCH MODEL PH 1 HIGH END PHONO PREAMPLIFIER, IM SEHR SCHÖNEN ZUSTAND kaum Gebrauchsspuren Technisch tadellos in Ordnung und sehr guter Klang Das Gerät stammt aus den USA und ist eine 120 Volt Version mit amerikanischem Netzstecker.Einen Spannungsumwandler auf 220 Volt (mit deutschem Netzstecker) lege ich mit ins Paket, damit Sie den Phono-Vorverstärker gleich bei ihnen in Betrieb nehmen können. Der DHL - Versand erfolgt sehr sorgfältig verpackt Privat, keine Garantie/ Gewähr, keine Rücknahme

ATTENTION! This auction is for AUDIO RESEARCH PREAMPLIFIER SP 14 ONLY!!!!! If you want to by extra AUDIO RESEARCH CLASSIC 60 - See My other auctions. The SP14s musicality comes surprisingly close to the state of the art, with soundstage of remarkable depth and breadth; imaging of uncanny solidity: palpable dynamic authority; timbral accuracy that virtually recreates live music; an exceptionally low noise floor; and a special ease with frequency extremes. But unlike many high-performance preamplifiers, the SP14 doesnt scrimp on control features. It has separate Gain and Attenuation for wide-ranging-yet-subtle level management. Separate Input and Record Output selectors (with a common menu) permit exceptional flexibility in playing and recording: owners can listen to one source while recording from another. The Bypass switch allows owners to remove the Balance and Mode controls from the signal path, for greater sonic purity. There are two separate sets of outputs, and three power outlets. And, of course, the SP14 features its own version of the hybrid technology that has made Audio Research electronics world-famous. As with every Audio Research product, SP14 parts quality, construction and factory support are the finest in the audio industry, with a two-decade track record to prove it. And all this comes at only half the cost of the celebrated SP15. FREQUENCY RESPONSEHigh-level section: ±.5dB, 5Hz to 50kHz, -3db points below 1Hz and above 200 kHz. Magnetic phono: ±.3dB of RIAA, 30Hz to 40kHzDISTORTION (THD)Less than .01% at 2V RMS outputNOISE & HUMHigh level: (1) 70 µV RMS maximum residual unweighted wideband noise at main output with gain control minimum (98 dB below 5V RMS output) (2) More than 100dB below 1V RMS input (less than 7 µV equivalent input noise). Phono: 0.12 µV equivalent input noise, IHF weighted, shorted input (78dB below 1mV input).GAINPhono input to tape output: 46 dB. Phono input to main output: 66 dB. High-level inputs to tape output: 0 dB. High-level inputs to main output: 20 dB.INPUT IMPEDANCELine inputs: 50 K ohms. Phono: 47K ohms (provisions for any value below 47K ohms or added input capacitance for matching certain magnetic cartridges.)OUTPUT IMPEDANCE250 ohms main output, 1000 ohms recorder output. Recommended load 60K - 100K ohms and 100pF. (20K ohms minimum and 1000pF maximum)OUTPUT POLARITY-MAXIMUM INPUTSMagnetic phono, 200mV at 1kHz (1000mV RMS, 10 kHz). High-level inputs are essentially overload-proof.RATED OUTPUTS2V RMS 5 Hz to 50 kHz, all outputs; 60K ohm load (main output capability is 50V RMS output at .5% THD at 1kHz into a 100K ohm load with 5V RMS high level input)POWER SUPPLIESElectronically-regulated low and high voltage supplies and electronic decoupling. Shielded toroid transformer. Line regulation is better than .01%.TUBE COMPLEMENT(1) 6DJ8/ECC88POWER REQUIREMENTS100-135VAC 60Hz (200-270VAC 50/60Hz) 60 WattsOTHERHybrid FET/Tube audio circuit, solid-state power supply. Inputs (7): Phono, C-D, Tuner, Video, Spare, Tape 1, Tape 2. Outputs (4): (2) Main, (2) Recorder. Controls (6): Gain, Attenuation, Balance. Mode, Record Out, Input. Switches (8): Power, Outlets, Bypass, Mute, Copy, Tape 1 to 2/2 to 1, Tape 2/1, Monitor.DIMENSIONS19” (48 cm) W x 5 ¼” (13.4 cm) H (standard rack panel) x 10 ¼” (26 cm) D. Handles extend 1 ? (4.1 cm) forward of front panel. Rear chassis fittings extend ? (2.3 cm)WEIGHT12 lbs. (5.5kg) Net, 21 lbs. (9.6 kg) Shipping

For your consideration is one of my audio treasures: the classic and strikingly awesome Audio Research SP-10 (Revision 6 - sometimes called MK II but not designated). I want to say that I will regret selling this but circumstances beyond my control dictate otherwise. The units are in mint condition. I have had these for years and always have babied it. (I own two pairs). This one hardly has been played. All tubes test strong and are Russian tubes as tested by Audio Research. You will be buying a legend for less than the money when new. In todays inflationary economy this preamp from Audio Research would cost $10,400.00 The condition is as you would expect from a one owner very limited use component. Not a scratch or blemish anywhere, entirely without issues. You do not see SP-10s in this kind of condition every day. I have packing appropriate for these units and all will be done correctly. Tubes will be packed separately in the right ARC containers. International bidders welcome. Shipping will be done via eBay International Shipping. S/N 43026002 and 33027028 –On Jul-25-23 at 14:12:38 PDT, seller added the following information: Copy of owners manual included

Audio Research Model LS8 MKII Preamplifier original box and manual NEW CONDITION. This device is in new condition, selling because I purchased a new preamplifier. The preamplifier was upgraded to a MKII in 2000, and you can see proof of this upgrade in the photos. It comes with the original manual, quality assurance certificate and original box.

ATTENTION! This auction is for AUDIO RESEARCH AMPLIFIER CLASSIC 60 ONLY!!!!! If you want to by extra AUDIO RESEARCH PREAMPLIFIER SP-14 - See My other auctions.The new Classic 60 Hybrid Stereo Power Amplifier resembles the long-popular D115 in Audio Researchs family of High Definition® power amplifiers. But its lineage is strictly Classic 150. Which means nothing less than state-of-the-art in design, construction, musicality, and operational convenience...at an affordable price. Like the Classic 150, the Classic 60 proceeds from the notion that power ratings dont always describe a power amplifiers real capabilities. Far more important are such qualities as dynamic stability. lucidity, subtlety. And to achieve those, Audio Research has used its traditional partial cathode coupling along with triode operation of the Classic 60s eight 6550 power output tubes. Additional circuit improvements, as well as the usual rigorous parts selection and manufacturing Audio Research, are noted for, also contributing sonically. Translated into the language of listening, this signifies stunning bandwidth, a noise floor virtually beneath audibility, and musically fulfilling SPLs at dramatically lower gain settings. Dynamics, timbres of individual instruments, soundstage, and musical emotion all surge out from a black velvet of silence. Simply put the Classic 60 resolves far more of a musical program than amplifiers rated at two, three, or four times its seemingly modest 60 WPC. But the Classic 60 is easily up to the task of driving all but the most demanding loudspeakers, even in spacious listening rooms. And while it shows modest preamplifiers in their best light, it also shines when coupled with premiere designs, such as Audio Researchs SP14 or SP15. Convenience figures are high on the Classic 60s list of attributes, as well. For example, the DC balance of the output tubes is maintained automatically, while tube biasing continuously adjusts to changes in incoming line voltage. Performance stays razor-sharp without bothersome tweaking or adjustments. And quiet fan cooling, along with triode operation, means significantly longer tube life. A Classic 60 owner can look forward to years of low-maintenance performance POWER OUTPUT60 watts minimum continuous at 16 ohms from 15Hz to 20kHz with less than 1.0% total harmonic distortion. Typically below .005% at 1 watt. The approximate actual power available at clipping: 62 watts. (1kHz) (Note that the actual RMS power output is dependent upon both line voltage and condition ie: if the power line has high distortion, maximum power will be affected adversely, although, from a listening standpoint, this is not very critical.)POWER BANDWIDTH(-3dB points): 12Hz to 40kHzFREQUENCY RESPONSE-INPUT SENSITIVITY.55V RMS for rated outputINPUT IMPEDANCE100K ohms, nominalOUTPUT TAPS-OUTPUT REGULATIONApproximately 0.3dB 16-ohm load to open circuitOVERALL NEGATIVE FEEDBACK20dBDAMPING FACTORApproximately 30DISTORTION-SLEW RATE20V/µsRISE TIME2.0 µsHUM & NOISELess than 2.0mV RMS - 84dB below-rated output (20kHz bandwidth unweighted, inputs shorted)POWER SUPPLY ENERGY STORAGEApproximately 280 joulesPOWER REQUIREMENTS105-125VAC 60Hz (210-250VAC 50Hz) 500 watts at rated output, 700 watts maximum, 370 watts at idleTUBE COMPLEMENT(4 matched pairs) 6550 power output, (4) 6FQ7/6CG7 driversDIMENSIONS19 (48 cm) W (standard rack panel) x 7 (18 cm) H x 15 ¾ (40 cm) D (front panel back). Handles extend 1 ? (4.1 cm) forward of the front panel. Output connectors extend 1 behind the rear panel.WEIGHT63 lbs (28.64 kg) Net, 76 lbs (34.55 kg) Shipping

VINTAGE AUDIO RESEARCH MODEL SP-3 TUBE PREAMPLIFIER, Looks to be in mint/good condition, no manuals… Serial number 371170-5A Serial number on outer box does not match unit… Unit is untested and sold in As-Is condition, Buyers are responsible for reviewing the entire listing description prior to committing to purchase, Images and videos (if provided) are of the actual item for sale and is to be considered as part of the description so please review them carefully, if you would like additional images please request prior to bidding, Majority of the items offered for sale are vintage and pre-owned unless otherwise stated, in which will exhibit typical signs of wear and or normal use. Any defects will be notated in the description but please keep in mind I’m am not an expert, I always try my best to list any defect I see but I may miss things from time to time so please feel free to ask questions and I’ll respond to the best of my ability… These items were purchased in a huge lot of vintage Radio and testing equipment, please see other listings as well….

VINTAGE AUDIO RESEARCH MODEL SP-3 TUBE PREAMPLIFIER, Looks to be in mint/good condition, no manuals… Serial number 371170-5A Serial number on outer box does not match unit… Unit is untested and sold in As-Is condition, Buyers are responsible for reviewing the entire listing description prior to committing to purchase, Images and videos (if provided) are of the actual item for sale and is to be considered as part of the description so please review them carefully, if you would like additional images please request prior to bidding, Majority of the items offered for sale are vintage and pre-owned unless otherwise stated, in which will exhibit typical signs of wear and or normal use. Any defects will be notated in the description but please keep in mind I’m am not an expert, I always try my best to list any defect I see but I may miss things from time to time so please feel free to ask questions and I’ll respond to the best of my ability… These items were purchased in a huge lot of vintage Radio and testing equipment, please see other listings as well….

Audio Research Model LS8 MKII Preamplifier original box and manual NEW CONDITION. This device is in new condition, selling because I purchased a new preamplifier. The preamplifier was upgraded to a MKII in 2000, and you can see proof of this upgrade in the photos. It comes with the original manual, quality assurance certificate and original box.

AUDIO RESEARCH MODEL PH 1 HIGH DEFINITION PHONO PREAMPLIFIER, IM SEHR SCHÖNEN ZUSTAND Nur leichte Gebrauchsspuren Technisch tadellos in Ordnung und sehr guter Klang Das Gerät stammt aus den USA und ist eine 120 Volt Version mit amerikanischem Netzstecker.Einen Spannungsumwandler auf 220 Volt lege ich mit ins Paket, damit Sie den Phono-Vorverstärker gleich bei ihnen in Betrieb nehmen können. Das Gerät hat einen wunderschönen Klang und lief bei uns meist in Verbindung mit einem Revox B790 Plattenspieler. In dieser Auktion wird nur der AUDIO RESEARCH MODEL PH 1 angeboten. Der Marantz Verstärker und der Revox Plattenspieler (Foto 1 bis 3) gehören NICHT zu dieser Auktion. Der DHL - Versand erfolgt sehr sorgfältig verpackt Privat, keine Garantie/ Gewähr, keine Rücknahme

ATTENTION! This auction is for AUDIO RESEARCH PREAMPLIFIER SP 14 ONLY!!!!! If you want to by extra AUDIO RESEARCH CLASSIC 60 - See My other auctions. The SP14s musicality comes surprisingly close to the state of the art, with soundstage of remarkable depth and breadth; imaging of uncanny solidity: palpable dynamic authority; timbral accuracy that virtually recreates live music; an exceptionally low noise floor; and a special ease with frequency extremes. But unlike many high-performance preamplifiers, the SP14 doesnt scrimp on control features. It has separate Gain and Attenuation for wide-ranging-yet-subtle level management. Separate Input and Record Output selectors (with a common menu) permit exceptional flexibility in playing and recording: owners can listen to one source while recording from another. The Bypass switch allows owners to remove the Balance and Mode controls from the signal path, for greater sonic purity. There are two separate sets of outputs, and three power outlets. And, of course, the SP14 features its own version of the hybrid technology that has made Audio Research electronics world-famous. As with every Audio Research product, SP14 parts quality, construction and factory support are the finest in the audio industry, with a two-decade track record to prove it. And all this comes at only half the cost of the celebrated SP15. FREQUENCY RESPONSEHigh-level section: ±.5dB, 5Hz to 50kHz, -3db points below 1Hz and above 200 kHz. Magnetic phono: ±.3dB of RIAA, 30Hz to 40kHzDISTORTION (THD)Less than .01% at 2V RMS outputNOISE & HUMHigh level: (1) 70 µV RMS maximum residual unweighted wideband noise at main output with gain control minimum (98 dB below 5V RMS output) (2) More than 100dB below 1V RMS input (less than 7 µV equivalent input noise). Phono: 0.12 µV equivalent input noise, IHF weighted, shorted input (78dB below 1mV input).GAINPhono input to tape output: 46 dB. Phono input to main output: 66 dB. High-level inputs to tape output: 0 dB. High-level inputs to main output: 20 dB.INPUT IMPEDANCELine inputs: 50 K ohms. Phono: 47K ohms (provisions for any value below 47K ohms or added input capacitance for matching certain magnetic cartridges.)OUTPUT IMPEDANCE250 ohms main output, 1000 ohms recorder output. Recommended load 60K - 100K ohms and 100pF. (20K ohms minimum and 1000pF maximum)OUTPUT POLARITY-MAXIMUM INPUTSMagnetic phono, 200mV at 1kHz (1000mV RMS, 10 kHz). High-level inputs are essentially overload-proof.RATED OUTPUTS2V RMS 5 Hz to 50 kHz, all outputs; 60K ohm load (main output capability is 50V RMS output at .5% THD at 1kHz into a 100K ohm load with 5V RMS high level input)POWER SUPPLIESElectronically-regulated low and high voltage supplies and electronic decoupling. Shielded toroid transformer. Line regulation is better than .01%.TUBE COMPLEMENT(1) 6DJ8/ECC88POWER REQUIREMENTS100-135VAC 60Hz (200-270VAC 50/60Hz) 60 WattsOTHERHybrid FET/Tube audio circuit, solid-state power supply. Inputs (7): Phono, C-D, Tuner, Video, Spare, Tape 1, Tape 2. Outputs (4): (2) Main, (2) Recorder. Controls (6): Gain, Attenuation, Balance. Mode, Record Out, Input. Switches (8): Power, Outlets, Bypass, Mute, Copy, Tape 1 to 2/2 to 1, Tape 2/1, Monitor.DIMENSIONS19” (48 cm) W x 5 ¼” (13.4 cm) H (standard rack panel) x 10 ¼” (26 cm) D. Handles extend 1 ? (4.1 cm) forward of front panel. Rear chassis fittings extend ? (2.3 cm)WEIGHT12 lbs. (5.5kg) Net, 21 lbs. (9.6 kg) Shipping

VINTAGE AUDIO RESEARCH MODEL SP-3 TUBE PREAMPLIFIER / PREAMP. Very good condition. Professionally checked and ready to go. Beautiful wooden case.

I have for sale some (one of a kind) Audio Research gold plated knobs. The knobs are from the estate of an Audio Research employee who was a friend of mine. These are (new old stock) knobs that were in storage for a number of years and have never been installed in equipment before. The overall condition of the knobs is excellent. The knobs will fit any Audio Research preamplifier that starts with an SP. Such as the SP-4, SP-5, SP-7, SP-6, SP-8, SP-9, SP-10, SP-11, SP-12 SP-14, SP-15. Some older Audio Research amplifiers also used this traditional styled knob, so they will work on those amplifiers too. Note: The knobs will not fit the Audio Research LS series of line stage preamplifiers. My ad is for 4 knobs as pictured...if you need more than 4 knobs, please email me. One thing worth mentioning...the knobs have a shiny gold surface, so its very hard to get a good picture of one knob or a group of knobs. The pictures have dark lines/shadows and distortions in them which are not present in the knobs. If you are unsure if the knobs will fit in your Audio Research piece of equipment, please email me before buying the knobs. Continental USA shipping only, No International sales.

VINTAGE AUDIO RESEARCH MODEL SP-3 TUBE PREAMPLIFIER, Looks to be in mint/good condition, no manuals… Serial number 371170-5A Serial number on outer box does not match unit… Unit is untested and sold in As-Is condition, Buyers are responsible for reviewing the entire listing description prior to committing to purchase, Images and videos (if provided) are of the actual item for sale and is to be considered as part of the description so please review them carefully, if you would like additional images please request prior to bidding, Majority of the items offered for sale are vintage and pre-owned unless otherwise stated, in which will exhibit typical signs of wear and or normal use. Any defects will be notated in the description but please keep in mind I’m am not an expert, I always try my best to list any defect I see but I may miss things from time to time so please feel free to ask questions and I’ll respond to the best of my ability… These items were purchased in a huge lot of vintage Radio and testing equipment, please see other listings as well….

ATTENTION! This auction is for AUDIO RESEARCH AMPLIFIER CLASSIC 60 ONLY!!!!! If you want to by extra AUDIO RESEARCH PREAMPLIFIER SP-14 - See My other auctions.The new Classic 60 Hybrid Stereo Power Amplifier resembles the long-popular D115 in Audio Researchs family of High Definition® power amplifiers. But its lineage is strictly Classic 150. Which means nothing less than state-of-the-art in design, construction, musicality, and operational convenience...at an affordable price. Like the Classic 150, the Classic 60 proceeds from the notion that power ratings dont always describe a power amplifiers real capabilities. Far more important are such qualities as dynamic stability. lucidity, subtlety. And to achieve those, Audio Research has used its traditional partial cathode coupling along with triode operation of the Classic 60s eight 6550 power output tubes. Additional circuit improvements, as well as the usual rigorous parts selection and manufacturing Audio Research, are noted for, also contributing sonically. Translated into the language of listening, this signifies stunning bandwidth, a noise floor virtually beneath audibility, and musically fulfilling SPLs at dramatically lower gain settings. Dynamics, timbres of individual instruments, soundstage, and musical emotion all surge out from a black velvet of silence. Simply put the Classic 60 resolves far more of a musical program than amplifiers rated at two, three, or four times its seemingly modest 60 WPC. But the Classic 60 is easily up to the task of driving all but the most demanding loudspeakers, even in spacious listening rooms. And while it shows modest preamplifiers in their best light, it also shines when coupled with premiere designs, such as Audio Researchs SP14 or SP15. Convenience figures are high on the Classic 60s list of attributes, as well. For example, the DC balance of the output tubes is maintained automatically, while tube biasing continuously adjusts to changes in incoming line voltage. Performance stays razor-sharp without bothersome tweaking or adjustments. And quiet fan cooling, along with triode operation, means significantly longer tube life. A Classic 60 owner can look forward to years of low-maintenance performance POWER OUTPUT60 watts minimum continuous at 16 ohms from 15Hz to 20kHz with less than 1.0% total harmonic distortion. Typically below .005% at 1 watt. The approximate actual power available at clipping: 62 watts. (1kHz) (Note that the actual RMS power output is dependent upon both line voltage and condition ie: if the power line has high distortion, maximum power will be affected adversely, although, from a listening standpoint, this is not very critical.)POWER BANDWIDTH(-3dB points): 12Hz to 40kHzFREQUENCY RESPONSE-INPUT SENSITIVITY.55V RMS for rated outputINPUT IMPEDANCE100K ohms, nominalOUTPUT TAPS-OUTPUT REGULATIONApproximately 0.3dB 16-ohm load to open circuitOVERALL NEGATIVE FEEDBACK20dBDAMPING FACTORApproximately 30DISTORTION-SLEW RATE20V/µsRISE TIME2.0 µsHUM & NOISELess than 2.0mV RMS - 84dB below-rated output (20kHz bandwidth unweighted, inputs shorted)POWER SUPPLY ENERGY STORAGEApproximately 280 joulesPOWER REQUIREMENTS105-125VAC 60Hz (210-250VAC 50Hz) 500 watts at rated output, 700 watts maximum, 370 watts at idleTUBE COMPLEMENT(4 matched pairs) 6550 power output, (4) 6FQ7/6CG7 driversDIMENSIONS19 (48 cm) W (standard rack panel) x 7 (18 cm) H x 15 ¾ (40 cm) D (front panel back). Handles extend 1 ? (4.1 cm) forward of the front panel. Output connectors extend 1 behind the rear panel.WEIGHT63 lbs (28.64 kg) Net, 76 lbs (34.55 kg) Shipping

AUDIO RESEARCH MODEL PH 1 HIGH DEFINITION PHONO PREAMPLIFIER, IM SEHR SCHÖNEN ZUSTAND Nur leichte Gebrauchsspuren Technisch tadellos in Ordnung und sehr guter Klang Das Gerät stammt aus den USA und ist eine 120 Volt Version mit amerikanischem Netzstecker.Einen Spannungsumwandler auf 220 Volt lege ich mit ins Paket, damit Sie den Phono-Vorverstärker gleich bei ihnen in Betrieb nehmen können. Das Gerät hat einen wunderschönen Klang und lief bei uns meist in Verbindung mit einem Revox B790 Plattenspieler. In dieser Auktion wird nur der AUDIO RESEARCH MODEL PH 1 angeboten. Der Marantz Verstärker und der Revox Plattenspieler (Foto 1 bis 3) gehören NICHT zu dieser Auktion. Der DHL - Versand erfolgt sehr sorgfältig verpackt Privat, keine Garantie/ Gewähr, keine Rücknahme

Audio Research SP9 Tube preamplifier Super Clean mint condition, Working perfectly, including phono input MADE IN USA The SP9 Hybrid Stereo Preamplifier represents a further evolution of the innovative electronic design first embodied in the widely acclaimed Audio Research SP11 Stereo Preamplifier. The SP9 is not a stripped-down version of the SP11, but rather represents an adaptation of some of the SP11s patented hybrid technology to a simpler, more economical single-chassis format.Using just two 6DJ8 vacuum tubes (one in the phono section and one in the high-level stage) in intermediary gain stages, the SP9 expresses the musicality and natural rightness vacuum-tube preamplifiers have been noted for, yet it does so with the quickness and dynamic vigor of the best solid-state designs.Because its two vacuum tubes are used so conservatively, the SP9 will undoubtedly prove to be one of the most reliable and lowmaintenance Audio Research preamps ever up to 10,000 hours of service life are possible before replacement of these tubes might be necessary. And, replacement tubes are not required to be select, low-noise (and expensive) types. Audio Research brand vacuum tubes obtained from your authorized dealer will provide the best performance and reliability.Although the SP9 contains an on-board power supply (as opposed to the SP11s isolated supply), it is a highly advanced, tightly regulated design employing a shielded toroidal power transformer to minimize any potential problems of mechanical noise or hum. Location of this transformer in relation to special low-hum input circuitry has been optimized within the SP9 chassis layout to virtually eliminate transformer-related noise. (Note that while outboard power supplies have become a popular design trend among high-end audio manufacturers, simply isolating the power supply from the main chassis has little benefit if the basic design of the supply itself is second-rate. In such cases, outboard isolation may be little more than a cosmetic cure for more serious deficiencies.)While the SP9 is designed to provide superb playback from phono records, its high-level circuits have also been optimized for other popular input sources, including compact discs. In this respect, the SP9 is virtually overloadproof, insuring maximum enjoyment of todays most dynamic program material. And, with two tape monitor loops, the SP9 offers the tapedubbing flexibility so many listeners want but seldom find in an audiophile-grade preamplifier.Of course, all controls and switches used in the SP9 have been carefully specified and selected to insure minimal sonic degradation - as have the other active and passive components used in the construction of the SP9. While the SP9 is more affordable than some other Audio Research preamplifiers, its more modest price was not achieved at the sacrifice of component quality. Careful, elegant design, structural simplicity and efficient manufacturing techniques have all contributed to a standard of physical integrity and musical accuracy never before achieved in this price class.To audition the SP9 Stereo Preamplifier, visit your authorized Audio Research dealer. Black front panel available at additional cost. Call or write for literature on the complete line of Audio Research products. PLESE SEE PHOTOS FOR ALL THE DETAILS.PLESE CHECK MY STORE AND OTHR ITEMS ALL ITEMS ARE TESTED BEFORE LISTING AND BEFORE SHIPPING. All listings can be canceled without any noticedWe use some other sites for selling to local and international customers If item is used, it has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. CHECK MY FEEDBACK AND BUY WITH CONFIDENCE. POLICY:Buyers have 14 days after the delivery to return the item if return is accept in that sale.We ask all buyers to email us before opening a EBAY CLAIM CASEWe ask all the buyers before leaving a negative or neutral, please email us with the problem first and we will do our best to solve it for you.We care about our buyers and we only want to see them happy.WE WANT TO SEE ALL OUR BUYERS SATISFIEDALL INTERNATIONAL BUYER”ShippingShippings are via FedEx, UPS or USPS ground Shipping will start In same or two days depending on your item.Shipping rate is for USA continental ONLY and is rated to all 48 state, please do not ask for the lower shipping rate. Local pick and inspection is free and can be CASH NO TAX when you do pick up.Shipping address must match eBay profile and CAN NOT be changed ALASKA AND HAWAII BUYERS must ask for the shipping rate before purchase.