Name: Vintage / Audio Research SP-3c // Tube Preamplifier / Minty Fresh
Brand: Audio Research
SKU: 8799843025117
Price: 3999.00 USD
Availability: OutOfStock

The Audio Research SP-3C is the quintessential tube preamplifier for vintage audio lovers, often regarded as the preamp that put Audio Research on the audiophile map. Originally launched in the early 1970s, the SP-3 series has had several revisions, with the C level being a significant upgrade over its predecessors. This model is a benchmark in tube-driven preamps, renowned for its musicality, warmth, and smooth sound. It's the kind of gear that transports you back to an era when audio equipment was built to last and designed to make music sound like, well, music.

Production

1971-1973

Condition

9/10

Serial No.

677220-6

Orig. MSRP

$595

Restoration

Replaced one bad tube from phono section
Cleaned control contacts
Tested all inputs

Factory Specs

Vacuum-tube stereo preamplifier.

Frequency response: 15Hz-30kHz, ±1dB

Distortion (THD): 0.005% at 5V out

Maximum output: 25V at 1kHz

S/N Ratio: 90dB (Aux input, no ref. level given).
Dimensions: 15 5/8" W by 5" H x 12½ D.

The History of Audio Research

Audio Research Corporation, affectionately known to fans as ARC, was founded by William Z. Johnson, who began designing custom audio electronics in the early 1950’s and who also operated a specialty audio retail store until the mid-1960’s. Johnson’s efforts almost single-handedly revived vacuum-tube designs at a time...
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