audio research
SP-5

Description
Solid state stereo preamplifier.

Introduced
1977

Discontinued
1980

Revisions
-

Options
Wood cabinet (WC-2) $75

MSRP (US new retail)
$595. Later increased to $695. Later increased to $895. Later increased to $1,095.

Specifications

Frequency response High level sections: ±.25 dB 20 Hz to 20 kHz. -3 dB points, 1 Hz and 100 kHz
Magnetic phono: ±.5 dB of RIAA, 20 Hz to 20 kHz
Optional moving coil pre-preamp (MCP-1) -3 dB points, 1 Hz and 100 kHz
Distortion (THD) Harmonic distortion: Less than 0.005% at 2 V RMS output (IHF load)
Intermodulation distortion: Less than 0.005% at 2 V RMS output (IHF load, SMPTE method)
THD and IMD decreases with decreasing output
Noise & hum High level inputs, more than 90 dB below 2 V RMS output. Magnetic phono input, less than 1 µV equivalent input noise with 1 Kohms input (RIAA weighted). Typically 80 dB below 10 mV input at 1 kHz.
Gain Magnetic phono input to tape output, 36 dB.
Magnetic phono input to main output, 60 dB.
High level inputs to main output, 24 dB.
Input impedance 50 Kohms (nominal, all inputs)
Magnetic phono 50 Kohms 200 pF (capacitance value may be reduced to 50 pF minimum, or increased as necessary).
Output impedance 50 ohms, recommended minimum load for maximum audio quality, 10 Kohms.
Output polarity  
Maximum inputs High level inputs, esentially overload proof.
Magnetic phono input, 150 mV RMS @ 1 kHz.
Rated outputs Maximum output 10 V RMS (all outputs, IHF load).
Power supplies  
Power requirements 105-120/210-240 VAC, 50/60 Hz, 20 watts
Other  
Dimensions 19" (48 cm) W (standard rack mount front panel size) x 3 ½" (8.9 cm) H x 8 ½" (21 cm) D. Handles extend 1 ½" (3.8 cm) forward of panel. Rear chassis fittings extend ¾" (1.9 cm).
Weight 16 lbs. (7.3 kg) Net, 20 lbs. (9.1 kg) Shipping

Reviews

Number 14 (Survey)

Pictures