Audio Research SP9

 

SOLD $2,000.00

MAR 2009

 

  • Mint condition

  • Silver Face Plate

  • 1987 - R.R.P. US$1,695.00

  • Original Box

  • Made In U.S.A.

  • Worldwide Shipping

 

Frequency response

High Level Section: ±.5dB, 5 Hz to 50 kHz, - 3dB points below 1 Hz and above 200kHz.

 

Phono: ±.3dB of RIAA, 30Hz to 40kHz.

Distortion (THD)

Less than 0.1% at 2V RMS output. (Typically less than 0.005% in midband)
(SP-9: < .01% @ 2V RMS output 10Hz to 30kHz )

Noise & hum

High Level: (1) 70 µV RMS maximum residual unweighted wideband noise at main output with gain control minimum (98 dB below 5V RMS output). (2) More than 100dB below 1 V RMS input (less than 7µV equivalent input noise)
(SP-9: Phono IHF weighted 72 dB below 1 mV input)

 

Phono: 0.12 µV equivalent input noise; IHF weighted, shorted input (78dB below 1 mV input).

Gain

Phono input to tape output: 46dB

 

Phono input to main output: 67dB (SP-9: Phono 66dB (RIAA ±.25 dB)

 

High level inputs to tape output: 0dB

 

High level inputs to main output: 21dB

 

CD input to main output: 9 dB

Input impedance

50 k ohms line inputs

 

47 K phono (Phono provisions for any value below 47K ohms or added input capacitance for matching certain magnetic cartridges)

Output impedance

250 ohms main output

 

850 ohms recorder output

 

Recommended load 60K ohms and 100pF. (20K ohms minimum)

Maximum inputs

Phono, 200 mv at 1kHz (1000 mv RMS, 10kHz)

 

High level inputs essentially overload proof

Rated outputs

2 V RMS 5 kHz to 50 kHz, all out-puts; 60k ohm load (main output capability is 50 V RMS output at 0.5% THD at 1 kHz into a 100K ohm load with 5V RMS high level input)

Power supplies

Electronically–regulated low and high voltage supplies and electronic decoupling. Shielded toroid transformer. Line Regulation better than .01%.

Tube complement

(2) 6922

Power requirements

100-135 VAC 60 Hz (200-270 VAC 50/60Hz) 55 watts max

Dimensions

19” (48 cm) W x 5 1/4” (13.4 cm) H (standard rack panel) x 10 Ľ” (26 cm) D. Handles extend 1 ˝” (3.8 cm) forward of the front panel. Rear chassis fittings extend 7/8” (2.3 cm).

Weight

12 lbs. (5.5 kg) Net; 21 lbs. (9.5 kg) Shipping