VTA305M

About the VTA305M

The Bob Carver VTA305M Black Beauty is a monoblock vacuum tube amplifier designed for audiophiles seeking high power and nuanced sound. It features a single line input with 100k ohm impedance, a 12AX7 current sourced long-tailed balanced pair input stage, and a 12AT7 pre-driver stage. The output stage uses three complementary sets of KT120 tubes in push-pull configuration (6 tubes total), delivering 305 watts into 8 ohms, 330 watts into 4 ohms, and 290 watts into 2 ohms. It includes an automatic DC restoration circuit (6AL5), a rear panel bias adjustment pot with front panel meter for "set and forget" biasing, and a feedback control switch offering 20dB for classic amplifier sound or 11dB for contemporary sound. The amplifier has a frequency response of 2 Hz to 85 kHz (-3dB), full power bandwidth of 24 Hz to 28 kHz without filters, distortion less than 0.5%, and noise better than 110 dB A-weighted referenced into rated power. The output transformer features interleaved windings with super wideband low leakage inductance design. Construction is point-to-point hand wired with high reliability wire wound and metal film resistors and metal polyester capacitors in the audio signal path. The amplifier weighs 42 pounds per chassis and measures approximately 12.5" wide x 7.2" tall x 14" deep. It is finished in gloss black with silver trim and made in the USA. Warranty is 7 years on the chassis and 1 year on tubes. The VTA305M was originally