Audio Research SP15 PRE-Amplifier (used)

Frequency response :
High level input: ±1dB 0.2Hz to 100kHz. -3dB below 0.1Hz and above 200kHz. Phono input: ±.2dB of RIAA 20Hz to 40kHz. ±1dB of RIAA 1.0Hz to 100kHz.

Distortion (THD):
Harmonic distortion: Less than .005% at 2V RMS output, 5Hz to 20kHz (Typically less than .001% at midband, phono or line input). Intermodulation distortion: Less than .003% at 2V RMS output]

Noise & hum:
IHF weighted, shorted input: Output (Gain down): 6µV (110dB below rated output). Input (High level): 3µV equivalent input (110dB below 1V input). Phono: 0.15µV equivalent input (76dB below 1mV input)

Gain:
At 1kHz, bypass mode: Phono input to tape output: 46dB (0.2V output from 1mV input). Phono input to main output: 75dB (0.175mV input for 1V output). High level input to main output: 29dB (36mV input for 1V output).
Input impedance
Phono: Front panel selectable 47K, 100, 30, 10, 3 ohms. Phono input capacitance: 150 pF at 10kHz. High level: 20K ohms or higher, depending on switch functions.

Output impedance:
200 ohms main, direct, inverted outputs. 500 ohms tape output. Recommended load 60K-100K ohms and 100pF (20Kohms minimum, 1000pF maximum)

Output polarity:
Tape outputs, direct output: Non-inverting. Invert output: Inverting. Main outputs (2): Selectable non-inverting or inverting. All outputs may be used simultaneously.

Maximum inputs:
Phono: 350 mV RMS at 1kHz, 1200 mV RMS at 10kHz (0.1 second maximum duration, 6dB less if continuous). High level: 25V RMS.

Rated outputs:
2V RMS 1Hz to 100kHz main, direct, inverted outputs. (Maximum 80V RMS at 0.2% THD at 1kHz into 60K ohm load with 2.85V RMS high level input).

Power supplies:
-

Tube complement:
(3) 6DJ8/ECC88

Power requirements:
95-135VAC 60Hz, 190-270VAC 50/60Hz, 130 Watts maximum


CONDITION:8/10
PRICE:RM14500


FOR MORE INFO,PLEASE CALL OR WHATAPPS:
018-9742567 YANG
016-5368723 YUAN

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