Audio Research SP20 STEREO PREAMPLIFIER


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Etiketler: Audio Research SP20 STEREO PREAMPLIFIER

FREQUENCY RESPONSE
Line: +/- 3dB 2 Hz to 80 kHz; -3dB 0.8Hz to 220 kHz 
Phono: +/- 0.1dB of RIAA 10Hz to 20kHz; +/- 0.4dB 5Hz to 80kHz 
Headphone: +/- 0.05dB 20Hz to 20kHz; -3dB 0.8Hz to 220kHz

THD+N
Line: <.003% at 2V RMS, Bal output 
Phono: <.005% at 3V RMS output, to Record output
Headphone: <.009% at 1V RMS output

GAIN
Line: 13.8dB, Processor: 0dB
Phono: 58dB @ 1KHz to Record output
Headphone: 11.3dB

NOISE
Line: <-101dBV volume at max.
Phono: <-77dBV to Record output 
Headphone: <-88dBV volume at max.

CHANNEL SEPARATION
Line: > 105dB Balanced output
Phono: >76dB to Record output
Headphone: >62dB

SIGNAL TO NOISE RATIO
Line: >125dB Balanced output
Phono: >94dB to Record output
Headphone: >110dB

RATED OUTPUTS
Line: 2V RMS (1V RMS SE) into 200k ohms balanced load (maximum balanced output capability is 18V RMS at less than .5% THD+N at 1kHz.).
Phono: 0.5V RMS into 100k load at Record output (maximum output capability is 25V RMS).
Headphone: 6V RMS maximum into 30 to 300 ohm load.

INPUT IMPEDANCE 
120k ohms Balanced, 60k ohms SE; Phono impedance programmable (100, 200, 500, 1000 or 47k ohms w/200pf unbalanced).

OUTPUT IMPEDANCE 
500 ohms Balanced, 250 ohms SE; 1000 ohms Record Out SE; <.05 ohms Headphone SE.

OUTPUT POLARITY
Non-inverting. 

MAXIMUM INPUT LINE
19V RMS Balanced, 9V RMS SE. Phono: 70mV RMS at 1kHz.

CONTROLS
Rotary Volume (104 steps), Rotary Input selector. Push 

BUTTONS 
Power, Mute, SPKR Off. Interactive Touch Screen. Rear RS-232 control and Remote IR input.

POWER SUPPLIES 
Electronically regulated low and high voltage supplies. Automatic 30 sec. warm-up/brown-out mute. Line regulation better than .01%. 

TUBE COMPLEMENT 
4 6H30 dual triode.

POWER REQUIREMENTS 
100 - 135VAC 60Hz (200 - 270VAC 50/60Hz) 77 watts maximum. Standby 2.7 watts.

DIMENSIONS
Width 19" (48 cm) 
Height 5.25"(13.4 cm) (standard rack panel) 
Depth 16.5"(42 cm) D.

WEIGHT 
17.8 lbs. (7.4 kg) Net; 
27.8 lbs. (10.5 kg) Shipping.

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