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Audio Research SP-12
https://www.qaudio.com/products/audio-research-sp-12
Audio Research SP 12RM (Rack Mount) tube stereo preamplifier. Specifications. Frequency response High level section: ±.5dB, 4Hz to 30kHz. -3dB points below 1Hz and above 70kHz; Magnetic phono: ±.25dB of RIAA, 30Hz to 20kHz; Distortion (THD)Harmonic distortion: Less than .02% at 2V RMS output, 20Hz to 20kHz
stereonomono - Hi Fi Compendium: Audio Research SP-12 ...
https://stereonomono.blogspot.com/2020/10/audio-research-sp-12-preamplifier.html
Audio Research Preamplifier The SP-12 is a musically accurate, High Definition wide bandwidth, vacuum tube preamplifier offering the serious music enthusiast uncompromised performance. With proper attention to set up the SP-12 can be placed in virtually any quality audio system, from the least costly to the most sophisticated without compromise in system performance.
audio research sp-12 anyone? | Audiokarma Home Audio ...
https://audiokarma.org/forums/index.php?threads/audio-research-sp-12-anyone.122931/
The Audio Research SP12 was the contemporary of the SP8 and SP10, and was their "budget" preamplifier- I think it was about $800 less than an SP8- that's over 1/3 less-a significant proportion. It was also, with the SP10, the first 6DJ8 based Audio Research preamp.
FS: Audio Research SP-12 (Refurbished)
https://www.audiocircle.com/index.php?topic=52882.0
The refurbished work alone was well over 500.00. This SP-12 sounds better than the stock Audio Research SP-6E I used to own back in the day. The SP-12 is basically the same topology as the highly regarded SP-10 in a single chassis. With the re-furbished power supply, the cap storage was increased ten fold.
Audio Research SP-12 Tube Pre-amplifier With Phono Stage ...
https://www.audiogon.com/listings/lis9i141-audio-research-sp-12-tube
The SP-12 is an all tube preamplifier. Works perfectly and in excellent cosmetic condition. All switches and tube sockets professionally cleaned. Contains 5 tubes. It has 4 line inputs and a phono input. All letters, in front and rear are as clear as new. No scratches. A couple of very minor nicks on the top of the faceplate. Generally looks great.
Audio Research SP-12 For Sale - Canuck Audio Mart
https://www.canuckaudiomart.com/details/649639316-audio-research-sp-12/
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