Audio Research REF75 VT Tube Power Amplifier
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The KT150 vacuum tube delivers power from the amplifier to your speakers. Newly designed solely for the audio industry, the KT150 offers higher power handling and current delivery. A matched pair of tubes per channel run conservatively, ensuring stable operation and many hours of trouble-free listening. Custom designed capacitors couple the output of the tubes to the speakers for the purest signal possible.
The Reference 75 SE is the new generation from a lineage of amplifiers only Audio Research could produce. Experience real music and unleash the capacity of your system – music in High Definition®.
|Power Output||75 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6% at 75 watts, below 0.05% at 1 watt. Approximate actual power available at ‘clipping’ 76 watts (1kHz). (Note that actual power output is dependent upon both line voltage and ‘condition’ i. e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.)|
|Power Bandwidth||(-3dB points) 7Hz to 60kHz.|
|Frequency Responce||(-3dB points at 1 watt) 0.7Hz to 75 kHz.
|Input Impedance||300K ohms Balanced.
|Output Polarity||Non-inverting. Balanced input pin 2+ (IEC-268).
|Output Taps||8 ohms, 4 ohms|
|Output Regulation||Approximately 1.0dB 8 ohm load to open circuit (Damping factor approximately 8).|
|Overall Negative Feedback||15dB|
|Slew Rate||10 Volts/microseconds|
|Rise Time||4.0 microseconds|
|Hum & Noise||Less than 0.06mV RMS - 112dB below rated output (iHF weighted input shorted)|
|Power supply energy storage||Approximately 520 Joules|
|Power Requirements||105-125VAC 60Hz (210-250VAC 50Hz) 410 watts at rated output, 500 watts maximum, 230 watts idle.|
|Tubes Required||2 – Matched pair KT150 – Power Output; 2 – 6H30 Driver.
|Dimensions||19" (48.3 cm) W x 8.75" (22.2 cm) H x 19.5" (49.5 cm) D. Handles extend 1.5" (3.8 cm) forward.|
|Weight||47 lbs. (21.3 kg) Net; 63 lbs. (28.6 kg) Shipping.|