Audio Research Reference 250 SE

Selling my Audio Research Reference 250 SE's amplifiers that I bought new from a ARC dealer. They were initially 250's that I sent back to Audio Research for the $9000 SE upgrade. They have a total of 554 hrs on them of which 150 hrs are since the upgrade. They are in flawless condition and work perfectly. They have spent most of their time covered up in our smoke free home. Comes with OEM cords, boxes, manuals, and tools. Can double box to protect original boxes. Local pickup encouraged.

Specifications

POWER OUTPUT

250 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 0.5% at 250 watts, below .04% at 1 watt.

POWER BANDWIDTH

(-3dB points) 5Hz to 70kHz.

FREQUENCY RESPONSE

(-3dB points at 1 watt) 0.5Hz to 110 kHz.

INPUT SENSITIVITY

2.4V RMS Balanced for rated output. (25.5 dB gain into 8 ohms.)

INPUT IMPEDANCE

200K ohms Balanced.

OUTPUT TAPS

4, 8, 16 ohms.

OUTPUT REGULATION

Approximately 0.9dB 16 ohm load to open circuit (Damping factor approximately 10).

OVERALL NEGATIVE FEEDBACK

8.8dB.

SLEW RATE

20 volts/microsecond.

RISE TIME

1.5 microseconds.

HUM & NOISE

Less than 0.2mV RMS 110dB below rated output (IHF-A weighted, input shorted, 16 ohm output).

POWER SUPPLY ENERGY STORAGE

Approximately 900 joules.

POWER REQUIREMENTS

105-130VAC 60Hz (260-250VAC 50Hz) 770 watts at rated output, 1000 watts maximum, 380 watts at “idle,” 1 watt off.

TUBES REQUIRED

3 Matched pair KT150 (Power output V1-6); 1 Matched pair KT150 (Driver V8-9); 2 6H30 (Gain stage V7 and Regulator Driver V10); 1 6550C (Regulator V11).

DIMENSIONS

19″ W x 8.75″ H x 19.5″ D. Handles extend 1.5″ (3.8 cm) forward.

WEIGHTS

73 lbs.  Shipping 88 lbs.