• Audio Research REF150 VT Tube Power Amplifier
  • Audio Research REF150 VT Tube Power Amplifier
  • Audio Research REF150 VT Tube Power Amplifier

Audio Research REF150 VT Tube Power Amplifier



Simply put, the REF150 SE is a breakthrough in stereo power amplification.  Replacing the REF150—which was one of the most respected modern stereo amplifiers—was a daunting task, but it has been accomplished.  The REF150 SE offers more power, greater dynamic thrust, a more vivid and resolved presentation, greater finesse, and quieter operation.  It is the new benchmark. Having identical outer dimensions as its predecessor, the REF150 SE has much more packed into its chassis.  Refined front-panel cosmetics reflect the updated look of current-generation models, with silver units having silver handles and silver top covers, while black units have black handles and black cover.  (Colors may be mixed to match older models.)
Power Bandwidth (-3dB points) 5Hz to 80kHz
Frequency Response 9-3dB points at 1 watt) 0.5 to 120 kHz
Input Sensitivity 2.0 V RMS BAL for rated output (24 dB bal gain into 8 ohms)
Input Impedance 300K ohms Balanced
Output Polarity Non-inverting. Balanced input pin 2+ (IEC-268)
Output taps 16 ohms, 8ohms, 4 ohms
Output Regulations Approximately 0.6dB 15 ohm load to open circuit (Damping factor approximately 14)
Overall Negative Feedback 14dB
Slew Rate 13 Volts/Microseconds. 
Rise Time 2.0 Microseconds
Hum & Noise Less than 0.1mV RMS - 114dB Below rated output (IHF Weighted input shorted)
Power Supply Energy Storage Approximately 1040 Joules.
Power Requirements 105-125VAC 60Hz (210-250VAC 50Hz) 730 watts at rated output, 900 watts maximum, 420 watts idle.
Tubes Required 2 – Matched quad KT150 – Power Output; 4 – 6H30 Driver
Dimensions 19"(48.3cm) W x 83⁄4" (22.2cm) H x 191⁄2" (49.5cm) D. Handlesextend 11⁄2" (3.8cm) forward. 
Weight 75lbs. (34.2kg) Net; 90lbs. (41kg) Shipping.

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