Audio Research VT100 High Definition Tube Amplifier - New Tubes

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100W Tube amplifier proudly handmade in the USA - using the highest quality components and attention to detail.

In beautiful cosmetic condition with only the slightest signs of use.

Identical to the MKII minus the noisy fan and the removable power cord. 

Tested in our lab where it produced 100 clean watts without any noise or drama.  We installed a brand new set of matched output tubes so you can experience this amp as if it were new.

RCA and XLR inputs available in the back, but it's currently configured for XLR.  Let us know if you would rather use the RCA's and we can switch it back for you.

Click here to download a copy of the manual

The VT100 is a new all-tube, balanced stereo power amplifier that draws upon the advanced technology of the flagship Reference Series models. Rated at 100 watts continuous output per channel, the VT100 is a Class AB, differential circuit design using two matched pair of 6550 output tubes in each channel, along with four 6922 twin triodes per channel for input and driver stages. A fully regulated, 540-joule power supply is distributed between two separate, isolated output circuit boards for short signal paths and true "dual mono" operation back to the massive main power transformer. Constant-current sources in the input stage help maintain stable drive characteristics and differential balance under the dynamic conditions of music reproduction.

Ultralinear output transformers and partial cathode coupling to the output terminals give the VT100 higher efficiency and lower output impedance than conventional designs for better drive into a wide variety of loudspeaker loads. Inputs include both single ended and balanced. Output terminals are custom-machined, heavy duty, gold-over-brass posts. A spacious chassis and single cooling fan help maintain conservative operating temperatures.

Description: Stereo tubed power amplifier with balanced inputs and 4, 8, and 16 ohm output transformer taps. Tube complement: 4 matched pairs of 6550C output tubes, 4 6H30 driver tubes. Maximum output power: 110Wpc continuous, 20Hz–20kHz at 1kHz with THD typically 0.3% at 110W, <0.03% at 1W; 120W at clipping (20.8dBW). Frequency response: 0.6Hz–90kHz, –3dB. Input sensitivity: 1.8V RMS balanced for rated output (24dB balanced gain into 8 ohms). Input impedance: 300k ohms balanced. Output polarity: non-inverting. Damping factor: approximately 12. Hum & noise: <0.2mV RMS, 106dB below rated output (IHF weighted, input shorted). Power requirements: 105–125VAC, 60Hz (210–250VAC, 50Hz), 630W at rated output, 800W maximum, 410W at "idle."

Dimensions: 19" (483mm) W by 8.75" (222mm) H by 19.5" (495mm) D. Handles extend 1.5" (38mm) forward. Weight: 67.4 lbs (30.7kg) net, 83 lbs (37.8kg) shipping.

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.