audio research
SP-10

Description
Two-chassis tube stereo preamplifier.

Introduced
1982

Discontinued
?

Revisions
SP-10 Rev 1
SP-10 Rev 2
SP-10 Rev 3
SP-10 Rev 4
SP-10 Rev 5
SP-10 Rev 6
SP-10 Rev 7

Rev 1 - Rev 5 are sometimes called MKI.
Rev 6 - Rev 7 are sometimes called MKII.

Options
Wood cabinet (WC-4)

MSRP (US new retail)
$3,450. Later increased to $3,700.

Specifications

Frequency response  
Distortion (THD) < .01% @ 2V RMS output
Noise & hum Phono: 88 dB below 10 mV input RIAA weighted
Gain Phono: 72 dB (RIAA ±.25 dB, 20Hz to 40kHz)
Line: 26dB (± .25 dB 5Hz to 30kHz)
Input impedance  
Output impedance  
Output polarity  
Maximum inputs  
Rated outputs  
Power supplies  
Tube complement (4) 6922 LN, (8) 6922, (2) 5881, (1) 12AT7
Power requirements  
Other  
Dimensions 19" W x 5.25" H x 10.25" D (each unit)
Weight 49 lbs. Shipping

Reviews

Number 32 (SP-10: Full Review), Number 33 (SP-10: Special Report), Issue 47 (SP-10 Revised: Editor's Choice), Issue 39&40 (SP-10 MKII: Further Thoughts)
Vol. 7 No. 3 (SP-10), Vol. 7 No. 7 (SP-10 Revised), Vol. 9 No. 7

Pictures

SP-10 MKI:

SP-10 MKII: