Audio Research SP-3A-1 Vacuum Tube Preamplifier

Description: Audio Research SP-3A-1CLICK on YouTube DEMO Link: https://youtu.be/tgMYrErMQOA For your consideration. A vintage Audio Research SP-3A-1 Tube Preamplifier (1974-75). S/N 478101-5A. In VG, if not EX cosmetic condition. For a detailed look of the unit up close "View listing photos & YouTube DEMO link". Audiophile grade restoration. Serviced, Re-capped & Re-Tubed with high grade audio components. RCA'S upgraded to gold plated. All service adjustments performed by a professional tech semi-retired with 45 years experience in high-end audio repairs to bring unit back to original factory specifications if not better. All products are fully tested. Faulty or under-spec components are replaced with modern high grade equivalents. Any known issues or potential weak points are rectified up-front to ensure these products continue to 'sing' for many years to come. Looks, sounds & performs beautifully. The unit shows signs of use, and is clean and working properly. That being said, due to the age of this device & the uncertain nature of vintage electronics. This unit is being sold as pictured/described. Item will ship insured with signature required. Thanks for looking! Audio Research SP-3A-1High Definition Stereo Control Amplifier (1974-75) Specifications FREQUENCY RESPONSE ±1dB 10Hz-30kHz, IHF load. ±1dB of RIAA 30Hz-30kHz DISTORTION (THD) Harmonic distortion: Less than 0.005% at 5V RMS output, IHF load. IM distortion: Less than 0.005% at 5V RMS output, IHF load, SMPTE method NOISE & HUM High level inputs (unweighted wide-band): more than 90dB below rated output. Magnetic phono inputs (below 10mV input) 20Hz to 20kHz: more than 70dB below rated outputs. Power line components (hum): more than 66dB GAIN 57dB, magnetic phono input, main outputs, IHF load. 34dB, magnetic phono input, tape outputs, IHF load. 23dB, high level inputs, main outputs, IHF load. 0dB, high level input, tape outputs, IHF load INPUT IMPEDANCE Magnetic Phono: 50K ohms typical (150 pf shunt). High Level: 100K ohms typical OUTPUT IMPEDANCE Less than 600 ohms @ 1kHz (all outputs). Recommended load: 20K or greater OUTPUT POLARITY - MAXIMUM INPUTS 300mV RMS @ 1kHz (magnetic phono input). High level inputs overload proof. RATED OUTPUTS Maximum output: 25V RMS @ 1kHz, all outputs POWER SUPPLIES - TUBE COMPLEMENT (2) 12AX7 LN, (6) 12AX7POWER REQUIREMENTS120/240V, 50/60Hz, 60 Watts OTHER Tone controls: Bass and treble variable ±18dB at 10Hz and 15kHz respectively DIMENSIONS 15 ⅝" W x 5½" H x 12½ D WEIGHT 14 lbs. Net. 20 lbs. My experience with the seller was exceptional. I was nervous about buying a turntable through the mail, but their packaging was INCREDIBLE. Soft foam to hold delicate parts in place, a separate protected box in the package for the platter, professional-level styrofoam throughout. And they messaged me about what to expect and the few steps needed to get the turntable running. Oh! And it worked perfectly out of the box =) I LOVED my experience with yesteryear_audio!Technics SL-1900 Fully-Automatic Direct-Drive Turntable S/N DA7L15A071 (#305260005516)Buyer: imajinarie (269) So sweet hurt my neck Vintage Marantz 6300 Turntable S/N 100661 J4 (#304809116581) Buyer: chrisraices1 (103) Condition was as described in the listing for this item. The packing of the receiver was above and beyond what was expected. Excellent experience with the seller +++++++++++++++++Pioneer SX-1980 AM/FM Stereo Receiver (Serviced & Restored) (#304887000852) Buyer: stif-5120 (6) Excellent piece of audio equipment, goes great with my Sansui AU-717. Works very nicely. Packing was expertly done with attention to detail. Five stars on all categories. 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My turntable was even better than described. (Private listing) Buyer: thask801_6 Good item and fast shipping ! thanks!!! Klyne SK-2A Moving Coil Preamp Step Up MC Preamplifier Head Amp + Manual (#303531778704) Buyer: cherry77777 A+++ Fantastic seller! Fast shipping! Well packed! Awesome. Thank you very much!! Vintage Marantz 2325 Pro Serviced & Recapped + LED Upgrade & Original Boxes (#303508296342) Buyer: miko00777 Fast Shipper!! Item As Described. Works Beautifully. Thanks!!! Vintage Technics SL-1900 Turntable w Pickering XSV-3000 & D3000 (#303370403737) Buyer: musiqman34 This seller is the most honest and profesional I have dealt with on ebay Vintage Luxman SQ-707 Solid State Stereo Integrated Amplifier (#303552358482) Buyer: lickdenstein As advertised. Expert packing and great communication. Vintage McIntosh MA6100 Integrated Amplifier (Professionaly Serviced & Recapped) (#303538133604) Buyer: piefra-86 Arrived quickly, items packed and padded perfectly. Transparent communication. Vintage Technics SL-1301 Quartz Lock Direct Drive Automatic 120V/240V Turntable (#303356004338) Buyer: hammond823 Well packaged and as described - thank you Vintage Nakamichi DR-3 Audiophile Professional Cassette Deck (#303274442807) Buyer: josiahmdanieliv Great seller, amp was cleaner than expected and works fine. A+++ all the way Vintage AIMS VTB-120 1970s Bass/Guitar Tube Amp - 120 watts - Made in the USA (#303515606026) Buyer: mongo-lloyds-of-london AAAAA+++++Well packed,fast shipping,item as described. Thanks! Vintage McIntosh MC2100 Stereo Power Amplifier (Serviced/Recapped) (#303514585192) Buyer: sbaggs2010

Price: 7999.95 USD

Location: Niagara Falls, New York

End Time: 2023-12-13T16:51:17.000Z

Shipping Cost: N/A USD