Audio Research

REF250SE

The concept of a large monoblock amplifier is to provide control to a speaker.  The difficult part of the job is maintaining finesse and musicality while doing it.  Audio Research has produced some of the most critically acclaimed products during its 42-year history and the new Reference 250 SE aims to break new ground. **Price In USD**

Regular price $17,000.00
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The concept of a large monoblock amplifier is to provide control to a speaker.  The difficult part of the job is maintaining finesse and musicality while doing it.  Audio Research has produced some of the most critically acclaimed products during its 42-year history and the new Reference 250 SE aims to break new ground. **Price In USD**

  • 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 Polarity: Non-inverting. Balanced input pin 2+ (IEC-268)
  • Output Taps: 16 ohms, 8 ohms, 4 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 (210- 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 V7-8); 2 6H30 (Gain stage V9 and Regulator Driver V11); 1 6550C (Regulator V10)
  • Dimensions: width 19” (48.3 cm) height8.75” (22.2 cm) depth 19.5” (49.5 cm) Handles extend 1.5” (3.8 cm) forward
  • Weight: 47 lbs. (21.3 kg) Net 63 lbs. (28.6 kg) Shipping