Audio Research SP-20 Vacuum Tube Preamplifier in Silver - SALE PENDING

The SP20 is a full-function line stage which incorporates a phono preamplifier and a ¼” headphone jack. Front panel controls have been minimized to two rotary controls and an interactive touch screen display, along with power, mute and output selector buttons.

About this product
Super condition store demo Audio Research SP20 Tube Preamplifier, in Silver finish. Unit comes in original box and packing, with remote control, power cord, and owner’s manual.

Unit is rated 7/10 for light cosmetic wear consistent with use including: a small mark on front face above display, two marks on right side of unit, and one faint mark on rear panel (see photos). These marks are purely cosmetic and do not affect unit functionality.

SPECIFICATIONS

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.

Additional Information
Please call 734.662.3595 and ask for Richard or Amanda if you have any questions about this product. We make every effort to update our ads quickly when inventory fluctuates, but we encourage you to call and check product availability, as we are also a brick and mortar store.

For a complete listing of all of our specials, please visit: https://www.paragonsns.com/product-category/preowned-specials/