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Audio Research SP20 preamplifier | Stereophile.com
https://www.stereophile.com/content/audio-research-sp20-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. There are also controls for input selection, volume, power, mute, and the headphone/speaker toggle.
Audio Research SP20 Preamplifier - Feature Articles
https://www.soundstageultra.com/index.php/equipment-menu/484-audio-research-sp20-preamplifier
Audio Research SP20 Preamplifier Price: $9000 USD. Warranty: Three years parts and labor to original purchaser; tubes, 90 days. Audio Research Corporation 3900 Annapolis Lane N. Plymouth, MN 55447-5447 Phone: (763) 577-9700 Fax: (763) 577-0323. Website: www.audioresearch.com
Audio Research SP-20 | Tube | Audiogon
https://www.audiogon.com/listings/lisa37i9-audio-research-sp-20-tube
See Soundstage review: https://www.soundstageultra.com/index.php/equipment-menu/484-audio-research-sp20-preamplifier "According to Dave Gordon, ARC’s managing director of sales, the SP20 ‘has a phono section comparable to a $7,000-ish phono stage, with a line section comparable to a $7,000-ish line stage, with a headphone output comparable to a $1,500-ish …
User Guide
https://audioresearch.com/wp-content/uploads/2021/08/SP20-Manual.pdf
Thank you for selecting the SP20 as part of your music listening system. The engineers and designers at Audio Research have spent countless hours of listening and testing to create a preamplifier of the highest caliber for music reproduction. The SP20 has been designed to provide you many years of playback.
Audio Research SP-20 Preamplifer ARC SP-20 | Tube | Audiogon
https://www.audiogon.com/listings/lisaf21b-audio-research-sp-20-preamplifer-arc-sp-20-tube
Audio Research SP-20 Preamplifier (Silver) Purchased 3/2019 from the original owner with invoice from ARC when he purchased the preamp. The SP-20 is in excellent to mint condition, with two or three small scuffs in the paint on top of the tube cover. Front and rear panels are mint.
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