• Audio Research D400 Stereo Power Amplifier, The excellent working condition!

    This unit has been tested working properly on all functions.
    $1,961.00
    Brand: Audio Research
    $164.85 shipping
    Type: Power Amplifier
    or Best Offer
    31 watching
  • Audio Research SP-20 Tube preamplifier 

    The SP20's physical appearance combines old and new. The faceplate with two large knobs evokes the look of the classic Audio Research designs of the early 1970s. On its rear panel, the SP20 has more inputs and outputs than I've seen on any other ARC model: one single-ended phono input, five single-ended line inputs, two balanced line inputs, one single-ended line output, two balanced line outputs, and a single-ended recording loop.
    $5,450.00
    Brand: Audio Research
    Free shipping
    Features: Remote
    or Best Offer
  • Audio research d200 Power amplifier

    This is a fantastic amplifier. If your looking, then you know. The condition is extremely good, as I baby my equipment. The Amp was still hooked up with the pictures, but I promise you will get the best surprise ever as the sound is amazing. This is a giant killer and the only reason I'm selling is due to my marriage and divorce. The condition is excellent. Any questions please ask as my feedback is perfect.
    $1,500.00
    Brand: Audio Research
    $45.00 shipping
    Type: Power Amplifier
    or Best Offer
    19 watching
  • Audio Research LS 27 PreAmplifier

    Audio Research is best known for their tube preamplifiers and this model competes closely with their very best. I have the original box, and the unit will be double-boxed and insured for safe arrival. Audio Research LS 27 PreAmplifier. Condition is Used. Shipped with USPS Priority Mail.
    $3,400.00
    Brand: Audio Research
    $22.43 shipping
    Type: Tube Pre-Amp
    or Best Offer
  • Audio Research LS-25 preamplifier

    This is the first version of the LS25 using 6DJ8 tubes, allowing tube rolling with 6DJ8s, 6922s, or 7308s. The faceplate, handles and knobs are near mint showing no marks at all, but there is moderate wear on the remote (from normal use); all functions work fine.
    $2,450.00
    Brand: Audio Research
    $19.14 shipping
    Type: Tube Pre-Amp
    or Best Offer
    Features: Remote
    17 watching
  • Audio Research Reference Phono 2SE Tube Phono Preamplifier; MM / MC; Remote

    "The Reference Phono 2 SE makes incredible music. Functional Notes: Operational condition of this item is excellent, fully tested and no issues found. Other Notes: Hours on tubes: 1004. Service History: None.
    $7,203.00
    Brand: Audio Research
    $134.99 shipping
  • Audio Research LS26 Stereo Tube Preamplifier

    Other Notes: "When a component combines as many excellent performance traits as the LS26, it’s hard not to gush over it. And in spite of my best attempts to remain objective, it’s likely you’ve sensed my great enthusiasm.
    $2,778.00
    Brand: Audio Research
    $64.99 shipping
    13 watching
  • Audio Research 100.2 High Definition Stereo Power Amplifier

    This is my other 100.2 Amplifier for sale. This does have surface scratches on the top. Works Great. The serial number is #88099008. Another iconic piece that is now available for sale. Buy one that works!
    $1,725.00
    0 bids
    $100.00 shipping
    Ending Jan 20 at 6:15PM PST1d 16hBrand: Audio ResearchType: Power Amplifier
  • Audio Research LS 2B High Definition Stereo Amplifier

    Great linestage tube hybrid preamp from the 90s. This is the factory balanced version (b), which retailed for $2995. In good working condition, could use a professional cleaning, but nothing beyond some static in the controls. The original owner spent good money to recap or upgrade this unit years ago (8-12 years). Factory capacitors were replaced with wonder caps or MIT multicaps. The tube is a Philips 7dj8 (low hours, phono grade from upscale audio) which sounds excellent. I will also include a sovtek 6922 tube (unknown hours). Free shipping to the continental US. Please feel free to ask any questions and thank you for looking. International buyers must use the eBay global shipping program.
    $1,500.00
    Brand: Audio Research
    $13.99 shipping
    or Best Offer
    13 watching
  • Audio Research ST-2000 Tuner

    AUDIO RESEARCH ST-200 Stereo Tuner. Nice, clean and working fine. Audio Research VT200 Stereo Amp. Audio Research D-125 Stereo Amp.
    $200.00
    Brand: Audio Research
    $25.35 shipping
  • Audio Research GS150 Stereo Tube Power Amplifier; GS-150

    Other Notes: Tube hours: 4155. Service History: None. Functional Notes: Operational condition of this item is excellent, fully tested and no issues found. Product SKU: 15433.
    $8,071.00
    Brand: Audio Research
    $299.00 shipping
    Type: Power Amplifier
    or Best Offer
    Features: Vu meter
    16 watching
  • AUDIO RESEARCH SP-10 MK2 PREAMPLIFIER ( THE HOLY GRAIL!)

    The tubes have all been tested and are all strong/excellent with an estimated 300 hours of use and will provide many years of use before a re-tube. I have for sale an Audio Research SP-10 mk2 preamp.
    $4,795.00
    Brand: Audio Research
    $125.00 shipping
    Color: Silver
    or Best Offer
    38 watching
  • Audio Research PH2 Balanced MM / MC Phono Preamplifier; PH-2

    Service History: None. Tobacco Exposure: No. # of Owners: 1.
    $926.00
    Brand: Audio Research
    $36.99 shipping
    25 watching
  • Audio Research Reference 5 preamplifier faceplate, silver

    I have for sale a Audio Research Reference 5 preamplifier silver faceplate. The overall condition as can be seen in the pictures is excellent.
    $189.95
    Brand: Audio Research
    $14.95 shipping
    Color: Silver
    or Best Offer
  • Audio Research REF75 Vacuum Tube Power Amplifier - Silver Faceplate

    Good luck!
    $4,500.00
    Brand: Audio Research
    $78.73 shipping
    Type: Power Amplifier
    or Best Offer
    Features: Vu meter
    14 watching
  • AUDIO RESEARCH ARC High Definition Tube Preamp SP-11 MKII & SP-11PS

    Nice, clean and working fine. Audio Research VT200 Stereo Amp. Audio Research D-125 Stereo Amp. Linn Sondek LP12 Turntable w/Ittok LVII Arm.
    $3,750.00
    Brand: Audio Research
    Free shipping
    Type: Tube Pre-Amp
    or Best Offer
  • Audio Research SP-9 preamplifier faceplate, natural silver.

    I have for sale a Audio Research SP-9 preamplifier silver faceplate. The overall condition as can be seen in the picture is excellent.
    $139.95
    Brand: Audio Research
    $9.95 shipping
    Color: Silver
    or Best Offer
  • Audio Research VSi75 Stereo Integrated Amplifier; Remote; Upgraded tubes

    "The VSi75 integrated amplifier breaks new ground in an ‘all in one’ product design, and sets a new benchmark in the lifelike reproduction of music. The previous owner says the KT150 tubes have less than 500 hours of use.
    $4,740.00
    Brand: Audio Research
    $98.99 shipping
    Type: Integrated Amplifier
  • Audio Research LS 2B MKll High Definition Stereo Amplifier

    This is my other amplifier. This one is all black and the serial number is #35157009. This is a rare and iconic piece to find one in this great condition.
    $1,350.00
    0 bids
    $55.00 shipping
    Ending Jan 20 at 6:13PM PST1d 16hBrand: Audio Research
  • LS1 Audio Research Line Amplifier Tube Preamplifier very rare (black face)

    Distortion (THD). 2V RMS 5Hz to 50Hz, all outputs, 60K ohm load (main output capability is 50V RMS output at 1/2% THD at 1kHz into a 100K ohm load with 5V RMS input). This unit has been tested, and the tube has been tested.
    $1,295.00
    Brand: Audio Research
    $42.85 shipping
    Type: Tube Pre-Amp
    or Best Offer
    Color: Black
    36 watching
  • New ListingAudio Research SP9 MK 3 Upgraded Preamplifier

    This is an Audio Research SP9 Upgraded Mk3 Preamplifier. New units also have the new, thicker front panel and handles, while these are optional on updated units. Note that only MK II units can be upgraded to the MK III standard; earlier units must first be upgrade to the MK II level.
    $1,388.00
    Brand: Audio Research
    $19.50 shipping
  • Chevin Research A2500 Monoblock Audio Amplifier

    Chevin Research A2500 Monoblock Audio Amplifier. Condition is Used. Shipped with FedEx Ground or FedEx Home Delivery.
    $500.00
    Brand: Audio Research
    $56.75 shipping
    or Best Offer
  • Audio Research BL2 Balanced Line Converter Driver Multi Channel Lightly Used

    BL2 pre-preamp. Used to convert Single ended connections to balanced. He did try it, and it works as it is supposed to. It is very lightly used. I bought a group of electronics from him in 11-18. Hawaii Alaska and Puerto Rico are extra.
    $1,000.00
    Brand: Audio Research
    $28.00 shipping
    Type: Solid State Pre-Amp
    or Best Offer
  • Chevin Research A3000 Audio Amplifier

    Has lived in a rack since new and in good condition.
    $1,000.00
    Brand: Audio Research
    $54.20 shipping
    or Best Offer
  • audio research r1 remote control faceplate sticker [4*T-17]

    Pretty straightforward.
    $10.00
    Brand: Audio Research
    Free shipping
    Features: Remote
    or Best Offer
  • AUDIO RESEARCH ETCHED GLASS SIGN W/BLACK OAK BASE

    AN 8" by 10" ETCHED GLASS SIGN ON A BLACK OAK BASE ADDS A TOUCH OF ELEGANCE AND CLASS TO YOUR PRIZED THEATER OR HIGHEND AUDIO SYSTEM. THESE PICTURES DO NOT DO JUSTICE TO BEAUTIFUL PIECES.
    $27.00
    Brand: Audio Research
    $10.50 shipping
    Color: Black
    Guaranteed by Mon, Jan 28
  • New ListingAudio Research D70 MK2 Power Amplifier

    I can do local pickup. I have uploaded the specs for you.
    $1,498.00
    Brand: Audio Research
    $37.36 shipping
    Type: Power Amplifier
  • Audio Research Reference 110 Natural Finish Tube Amplifier - Near Mint!!

    Power output is 110 WPC continuous, based upon a push-pull, fully balanced circuit utilizing two matched pairs of 6550C output tubes per channel. The REF110 is truly a Reference product, maintaining the musical presentation of its larger siblings.
    $4,200.00
    Brand: Audio Research
    $68.14 shipping
    Type: Power Amplifier
    or Best Offer
  • Audio Research D52B power amplifier stereo 50 watts per channel

    120 watts at idle. 300 watts at rated power. Typically less than. 02% at rated power in midband. Approximate actual power available per channel at "clipping" (both ch. : 80 (4 ohms), 60 (8 ohms), 35 (16 ohms). ).
    $1,300.00
    Brand: Audio Research
    $65.08 shipping
    Type: Power Amplifier
    or Best Offer
    14 watching
  • Audio Research VSi75 Stereo Tube Integrated Amplifier; VSi-75

    "The VSi75 integrated amplifier breaks new ground in an ‘all in one’ product design, and sets a new benchmark in the lifelike reproduction of music. Other Notes: Tube hours: 625. Serial Number: 53407001.
    $4,793.00
    Brand: Audio Research
    $84.99 shipping
    Type: Integrated Amplifier
  • 2x audio research hd220 capacitor circuit boards pcbs pwb732a [4*H-10.5]

    Surplus boards.
    $50.00
    Brand: Audio Research
    Free shipping
    or Best Offer
  • Vintage Audio Research ST-2000 Tuner

    In good working order.
    $99.00
    From Canada
    $55.00 shipping
    Brand: Audio Research
  • Audio Research LS1 Faceplate (Silver) - New

    Brand new Audio Research LS1 faceplate in silver. Never installed.
    $225.00
    Brand: Audio Research
    Free shipping
    Color: Silver
    or Best Offer
    4 watching
  • Custom Audio Research Volume control tester calibrator Alps Blue Velvet

    I don't know much about this tester. Not sure how it works or IF it works. Could be used for any dual section pot probably. Look at the pictures. what you see is what you get and there is no further info about it and anyone that knew anything about it is long gone.
    $99.99
    Brand: Audio Research
    $10.00 shipping
    Features: Volume Control
    or Best Offer
    Color: Blue
  • arc Audio Research preamplifier phono face plate PH7 

    $269.00
    Brand: Audio Research
    Free shipping
    Type: Phono Pre-Amp
    or Best Offer
  • EXTREMLY RARE Electronic Industries Audio Research FIRST Circuit Boards 1 & 2!

    Incredibly rare! Part Number PCB-1 & 2 the FIRST and SECOND products William Z Johnson ever produced! These are essentially PRICELESS! Included in the deal were Bill Johnson, his patent applications and his technical files.
    $299.00
    Brand: Audio Research
    Free shipping
    Type: Tube Amplifier
    or Best Offer
  • AUDIO RESEARCH SP-8 MK 2 ULTIMO II Tube Set Genalex Gold Pin - Our Best Set

    ULTIMO II (our best sounding, top-of-the-line) tube set with new issue Genalex Gold Lion gold pin 12AX7/ECC83GP, preamp tubes matched and balanced for rich and creamy tones - our very best set to make you sound great!
    $279.97
    Brand: Audio Research
    Free shipping
    Color: Gold
  • Audio Research REF5 Reference 5 Faceplate (Silver) - New

    Brand new Audio Research REF5 faceplate in silver. Never installed. Still in ARC original packaging.
    $225.00
    Brand: Audio Research
    Free shipping
    Type: Tube Pre-Amp
    or Best Offer
    Features: Remote
  • A PAIR (2) OF AUDIO RESEARCH REFERENCE 600 MONOBLOCK VACUUM TUBE POWER AMPLIFIER

    Each output tube is individually biasable from the front panel. A standby mode limits tube current draw during warmup or between periods of operation. Front panels of both Reference Series models are available in anodized natural aluminum.
    $9,290.00
    From Greece
    $540.00 shipping
    Brand: Audio Research
    or Best Offer
    Type: Tube Amplifier
    15 watching
    Features: Vu meter
  • Audio Research LS7 Line Stage Valve Preamplifiier

    This is a genuine well looked after and regularly used example of this classic amplifier, which will appeal to anyone serious about their music. The amplifier is in perfect working order, in very good condition and sounds great.
    $903.42
    From United Kingdom
    $116.15 shipping
    Brand: Audio Research
    11 watching
  • Audio Research Jewell Meter Plate 500 Watt

    Not sure what model this is from??. found in a box of stuff from a retired ARC engineer. plate is not perfect.
    $29.99
    Brand: Audio Research
    Free shipping
    or Best Offer
  • RARE Audio Research MCP33 Control board BRAND NEW!!! MCP-33

    Incredibly rare! Part Number 16025210.
    $19.99
    Brand: Audio Research
    Free shipping
    Type: Preamp/Processor
    or Best Offer
    8 watching
  • RARE Audio Research D60 D120 Output board BRAND NEW!!! D-60 D-120

    Incredibly rare! Part Number 16017410. Buy it now or forever hold your peace! I am not sure what revision level these boards are.
    $19.99
    Brand: Audio Research
    Free shipping
    Type: Preamp/Processor
    or Best Offer
  • EXTREMLY RARE Peploe 1969 Audio Research Circuit Board Own a Piece of HISTORY!

    Included in the deal were Bill Johnson, his patent applications and his technical files. In 1970 Bill Johnson quits Peploe to start Audio Research Corporation. He was able to buy back his patents. Incredibly rare!
    $39.99
    Brand: Audio Research
    Free shipping
    Type: Tube Amplifier
    or Best Offer
  • Audio Research LS2 Stereo Tube Pre Tube Amplifier Amp Working Rare Ex++

    Main out: 1 line, 500 Ω Record out: 2 lines, 850 Ω. Middle East. Ordering More than 1 item??.
    $2,050.00
    From Japan
    $158.10 shipping
    Brand: Audio Research
    or Best Offer
    Type: Tube Amplifier
  • AUDIO RESEARCH REFERENCE 2 MKII PREAMPLIFIER (BOXED) - WORLDWIDE SHIPPING

    Audio Research Reference 2 mkII valve/tube preamplifier Complete with original Audio Research box, packaging and remote control Tested and fully operational Excellent condition (see images).
    $3,871.80
    From United Kingdom
    $154.87 shipping
    Brand: Audio Research
    or Best Offer
    36 watching
  • Audio Research VSi60 Integrated amplifier in 230V, Made in USA

    Auiod Research VSi60 Integrated amplifier. MADE IN USA in 230V. Power levels from each were almost identical so secondary coupling efficiency is good. It should give a tidy yet impressive sound, much like its predecessor.NK.
    $4,000.00
    From Hong Kong
    $250.00 shipping
    Brand: Audio Research
    or Best Offer
    Type: Integrated Amplifier
    15 watching
    Color: Black
  • audio research VT100MK3 Stereo power amplifier AC100V Working Properly (d321

    There is no noticeable scratch and the operation is also good. There is a black thread mark of 1 cm in one place on the front panel part, but it is not a conspicuous level. Condition : Used.
    $5,720.00
    From Japan
    Free shipping
    Brand: Audio Research
    or Best Offer
    Type: Power Amplifier
Got one to sell?

Got one to sell?

Get it in front of 160+ million buyers.

Everything to Know Before Purchasing an Audio Research Amplifier

If you want your home stereo system to sound great, a quality amplifier is an addition to consider. Audio Research makes high-quality amps that audiophiles have been using in their systems for years. Check out some pertinent information about these preamps below before shopping through the available units on eBay.

Does Audio Research make solid state amplifiers?

Yes. While vacuum tubes were the industry standard for years, solid state amplifiers have become more common as their quality has improved. A solid-state amplifier uses, instead of vacuum tubes, components like diodes and transistors to send audio signal through a solid conductor. Solid state amplifiers are generally lighter and more portable than tube amps. They also provide lower costs for maintenance.

What models of Audio Research are available?

Audio Research has been manufacturing amplifiers for years, making many technological advancements along the way. The product line includes a variety of different models, each with its own set of benefits and features. The following are some of the models available on eBay for purchase:

  • SP7
  • SP8
  • LS12
  • LS22
  • M150
How do Audio Research amps achieve a warm sound?

Even though they don't use vacuum tubes, Audio Research amps still have a warm analog sounding quality. This is captured through analog modeling technology. AM-8 Analog Modelers are built into each unit, helping mimic the classic sound of the sought-after vacuum tube in a simpler design. There are some other advantages to analog modeling, such as the following:

  • Wear and tear - There are less moving parts and less heat on these solid state devices, meaning they will last longer without needing to be repaired.
  • Noise floor - The digital design provides a low noise floor, meaning you can crank the music much higher without distorting the sound.
  • Zero-impedence - This technology completely separates the phono inputs from the inputs designed for other audio devices, assuring each channel has the right voltage.
  • Power - Analog devices can lose sound quality with changes in the power supply. This doesn't happen with solid state American Research amplifiers.
  • No warm-up - Each model is fully operational within seconds of being powered on. There is no warm-up period.
What control knobs are available on these units?

Generally, these units have four front-loaded heavy-duty knobs on the front of the unit. The far-left is designed for gain. Next over, you have the knob that determines the stereo balance. Third from the left is the "mode" knob and the last knob determines which input signal the amplifier is broadcasting.

Content provided for informational purposes only. eBay is not affiliated with or endorsed by Audio Research.
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