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Audio Research Reference 75 power amplifier …
https://www.stereophile.com/content/audio-research-reference-75-power-amplifier-measurements
The front-panel meters indicated an output of 1W when the measured power output was 1W into 8 ohms from the 4 ohm tap. Audio Research specifies the Reference 75's maximum power as 75Wpc (18.75dBW into 8 ohms) at typically 0.6% THD. Figs. 5, 6, and 7 show how the THD+noise percentage increases with power into 8, 4, and 2 ohms at 1kHz from the 4 ohm output …
Dunlavy 4 or 8 ohms for Audio Research VT-100 amp?
https://forum.audiogon.com/discussions/dunlavy-4-or-8-ohms-for-audio-research-vt-100-amp
I recall reading somewhere, probably a thread here, that for Audio Research amps the 4 ohm taps sound the best so use them if they are close to your speakers impedance. Of course you should try both to see which sounds best, but you won't do any damage using either 4 or 8 ohm taps. jwin 101 posts 01-15-2007 6:45pm
I/50 Integrated – Audio Research
https://audioresearch.com/i50/
Input Impedance: 100K ohms Balanced, 48K ohms Single Ended. Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268) Output Taps: 8 ohms, 4 ohms. Power Requirements: 105-130VAC 60Hz (210-250VAC 50Hz) 252 watts at rated output. Tubes Required: 2 matched pair 6550WE; 3-6922 (1 input, 2 driver). Dimensions: Width 16.5” (42 cm) Height 7.25” (18 cm)
SoundStage! Measurements - Audio Research Reference 110 ...
https://www.soundstagenetwork.com/measurements/amplifiers/arc_reference_110/
4-ohm load at 10% THD: 135W General The Audio Research Reference 110 is a medium-power stereo push-pull tube-based power amplifier utilizing two pairs of 6550 output tubes per channel. This unit is most unusual in vacuum-tube power-amplifier design in that it has no phase
Audio Research D-76a | Tube | Beverly Hills, California ...
https://www.audiogon.com/listings/lisafba6-audio-research-d-76a-tube
Audio Research D-76a used SPECIFICATIONS: POWER OUTPUT 75 Watts per channel minimum RMS (both channels operating) into a 4, 8 or 16 ohm load from 20 Hz to 15 kHz with less than 1% total harmonic distortion INPUT SENSIT... 2500.00. Home. Marketplace.
Audio Research D-76a | Tube | Beverly Hills, California ...
https://www.audiogon.com/listings/lisafbib-audio-research-d-76a-tube
2 days ago · Audio Research D-76a for sale. SPECIFICATIONS: POWER OUTPUT 75 Watts per channel minimum RMS (both channels operating) into a 4, 8 or 16 ohm load from 20 Hz to 15 kHz with less than 1% total harmonic distortion INPUT SENSITIVITY...
Audio Research I/50 Integrated Amplifier | Audio Advisors
https://audioadvisors.com/audio-research-i-50-integrated-amplifier/
Input Impedance: 100K ohms Balanced, 48K ohms Single Ended Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268) Output Taps: 8 ohms, 4 ohms Power Requirements: 105-130VAC 60Hz (210-250VAC 50Hz) 252 watts at rated output. Tubes Required: 2 matched pair 6550WE; 3-6922 (1 input, 2 driver). Dimensions: Width 16.5” (42 cm)
Audio Research – High-end audio equipment
https://audioresearch.com/
Audio Research continues its dedication to unparalleled musical expression and crafting components of the highest quality and lasting value for its customers. Our long-term dedication to service is peerless in this industry (Audio Research, with few exceptions, can repair anything ever produced during its entire history).
Audio Research VT100 power amplifier Measurements ...
https://www.stereophile.com/content/audio-research-vt100-power-amplifier-measurements
Fig.6 Audio Research VT100, 8 ohm tap, spectrum of 50Hz sinewave, DC–1kHz, at 67W into 4 ohms (linear frequency scale). Fig.7 shows the output spectrum with a combined 19+20kHz signal—it shows the intermodulation products resulting from an equal combination of these two frequencies—at 47.7W into 4 ohms (visible clipping is present above this output with …
Audio Research reveals all-new I/50 integrated valve ...
https://www.whathifi.com/us/news/audio-research-reveals-all-new-i50-integrated-valve-amplifier
The stereo amplifier features two matched pairs of 6550WE vacuum tubes, along with three 6922 tubes. With a high current and 50 Watts per channel, the I/50 is intended to be compatible with a wide variety of stereo speakers.The amplifier includes both 4 Ohm and 8 Ohm speaker taps and there's also a headphone jack for private listening.
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