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D250 Manual - Audio Research
https://audioresearch.com/wp-content/uploads/2021/06/D250_Manual.pdf
because of the d250's high power capability (total of 500 watts of audio) and the therefore relatively high input power requirements (approximately 900 watts at idle, with peaks of up to 2kw) a "standby" switch has been provided, this switch, which increases the "bias" on the output tubes so that they are "cut off 't or in a non-conducting state, …
Audio Research D-250 II Servo power amplifier Page 2 ...
https://www.stereophile.com/content/audio-research-d-250-ii-servo-power-amplifier-page-2
The D-250 is one of the few power amplifiers available which has input level-set controls—a feature that will rarely be needed in most installations, but which is of inestimable value when it is needed. For example, Infinity's RS-1B crossover provides no control of HF gain, and has barely enough gain in the LF section to balance out the upper-range speakers.
Audio Research D-250 II Servo power amplifier ...
https://www.stereophile.com/content/audio-research-d-250-ii-servo-power-amplifier-specifications
Description: All-tube stereo amplifier. Power output: 240W below 1% THD from 20Hz to 20kHz into 16 ohms; clipping point 250W. Power bandwidth: -3dB at 12Hz and 60kHz. IM distortion: below 0.1% at 1dB below rated output. Sensitivity: 800mV for rated output. Input impedance: 75k ohms. Damping factor: approx 20. Hum and noise: 90dB below rated output.
Audio Research D-250 Stereo Power Amplifier Manual | HiFi ...
https://www.hifiengine.com/manual_library/audio-research/d-250.shtml
Audio Research D-250. Stereo Power Amplifier (1983-84) add a review. Specifications. mkII; Power output: 240 watts per channel into 16Ω (stereo) ... This website is not affiliated with or sponsored by Audio Research. To purchase D-250/D-250 mkII spares or accessories, please contact the company via their website or visit an authorised ...
Audio Research D250 stereo tube power amplifier | eBay
https://www.ebay.com/itm/Audio-Research-D250-stereo-tube-power-amplifier-/143534009933
Find many great new & used options and get the best deals for Audio Research D250 stereo tube power amplifier at the best online …
Audio Research D-250 II Servo power amplifier Page 4 ...
https://www.stereophile.com/content/audio-research-d-250-ii-servo-power-amplifier-page-4
Audio Research D-250 II Servo power amplifier Page 4. With less demanding loads, the low-end characteristic which sounds "right" (or "best," if you prefer) will be as dependent on the loudspeakers used as on the amplifier. As always, the name of the game here is mating complementary products—speakers and amps whose LF behaviour offsets one ...
ARCDB
https://www.arcdb.ws/model/D250
D-250 MKII Servo manual D-250 parts list Specifications Power output 240 watts per channel minimum continuous (both channels operating) at 16 ohms from 25Hz to 20kHz with less than 1% total harmonic distortion. Typically below .005% at 1 watt. Approximate actual power available per channel at "clipping" (both CH. OP, 1kHz): 250 watts.
Audio Research Reference 250 SE Amplifier - The …
https://www.theabsolutesound.com/articles/audio-research-reference-250-se-amplifier
A. A new Reference tube amplifier from venerable manufacturer Audio Research is always a big deal. Incorporating significant upgrades from its Reference 250 predecessor, the Reference 250 SE mono amplifier features Tung-Sol’s latest high-current output tube, the KT150 as well as new active and passive parts. Reference 250 owners can have their unit upgraded to …
Audio Research – High-end audio equipment
https://audioresearch.com/
At the heart of our Power Amplifiers is decades of proven Audio Research vacuum tube technology, a legacy unrivaled by any other manufacturer of tube electronics. Developed through hundreds of hours of critical listening, the carefully selected components comprising our Power Amplifiers combine to provide an array of amplifiers which transcends ...
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