Audio Research SP-9 mkIII
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Condition | |
Payment methods | |
Ships from | Mahomet, IL, 61853 |
Ships to | United States |
Package dimensions | 24.0" × 16.0" × 10.0" (21.0 lbs.) |
Shipping carriers | USPS, UPS or FedEx |
Shipping cost | Log in to see price |
Original accessories | Box, Manual |
Average | Research Pricing |
Great hybrid preamp with tremendous phono section. Original owner. Rated 8/10 for age only.
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)
Output
polarity
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
Other
Dimensions
19” (48 cm) W x 5 1/4” (13.4 cm) H
(standard rack panel) x 10 ¼” (26 cm) D. Handles extend 1 ½” (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
Read more at
https://www.stereophile.com/content/audio-research-sp9-preamplifier-specifications#7GBdXD5phrZOKCeP.99
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Item can be returned within 30 days of receipt.
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Buyer will receive a full refund in the original payment method less any shipping charges.