Audio Research VT200 Tube Stereo Amplifier

Description: For sell is Audio Research VT200 Tube Stereo Amplifier,The VT200 vacuum tube stereo power amplifier is the most powerful of the three VT-series models. Rated at 200 watts per channel into a wide range of speaker loads, the VT200 encompasses a "dual mono" circuit layout reaching back to the massive single power transformer. Eight matched pair of 6650C output tubes and 674 joules of distributed energy storage give the VT200 unwavering control over the most difficult speaker loads, without sacrificing dynamic freedom or musical nuance.Separate left and right input and output circuit boards, with distributed power supplies, keep signal path lengths at a minimum for quicker transient attack and explosive musical dynamics. As with other VT models, constant-current sources in the input stage help maintain stable drive characteristics and differential balance of the output stage under the rapidly changing demands of actual music reproduction. Ultralinear output transformers with partial cathode coupling to the output terminals give the VT200 higher efficiency and lower output impedance than conventional vacuum-tube amplifiers. This results in better control of the loudspeaker throughout its frequency and impedance spectrum.Both single-ended (100K ohms) and balanced (200K ohms) inputs are included to allow use with any high-quality stereo preamplifier. Custom-machined, gold-over-brass five-way output terminals allow a secure, high-contact connection to a variety of speaker impedances: 1, 2, 4, 8 or 16 ohms.Internally, the VT200 presents a very open architecture within a spacious, rugged chassis. A single cooling fan operable at three different speeds provides unobstrusive cooling of interior components, including the vacuum tubes mounted along the chassis sidewalls.Biasing of the output tubes is easily accomplished via two trim pots for each channel, accessible through holes located along each sidewall of the chassis.POWER OUTPUT200 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 200 watts, below .01% at 1 watt. Approximate actual power available at "clipping": 210 watts (1kHz) (Note that the actual RMS power output is dependent upon both line voltage and "condition" ie: 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) 12Hz to 120kHzFREQUENCY RESPONSE(-3dB points at 1 watt) 0.5Hz to 200 kHzINPUT SENSITIVITY2.5V RMS (Bal or SE) for rated output. (27 dB gain into 16 ohms)INPUT IMPEDANCE200K ohms Balanced, 100K ohms Single-endedOUTPUT TAPS1, 2, 4, 8, 16 ohmsOUTPUT REGULATIONApproximately 0.8dB 16 ohm load to open circuitOVERALL NEGATIVE FEEDBACK10 dBDAMPING FACTORApproximately 11DISTORTION1kHz total harmonic distortion typically 1% at 200 watts, below .01% at 1 watt.SLEW RATE25 Volts/µsRISE TIME1.5 µsHUM & NOISELess than 0.2mV RMS - 109dB below rated output (IHF weighted, input shorted, 16 ohm output)POWER SUPPLY ENERGY STORAGEApproximately 674 joulesPOWER REQUIREMENTS105-125VAC 60Hz (210-250VAC 50Hz) 990 watts at rated output, 1200 watts maximum, 680 watts at "idle"TUBE COMPLEMENTVT200: (8 matched pairs) 6550C power output, (6) 6922 driver, (4) 6922 input. VT200 MKII: (8 matched pairs) 6550C power output, (6) 6H30 driverDIMENSIONS19" (48.3 cm) W x 10½" (26.7 cm) H x 23.6" (60.0 cm) D. Handles extend 1½" (3.8 cm) forwardWEIGHT118 lbs. (46.5 kg) Net; 148 lbs. (58.3 kg) Shipping.

Price: 3290 USD

Location: Portland, Oregon

End Time: 2023-12-14T22:10:50.000Z

Shipping Cost: N/A USD