Saturday, September 17, 2011

Bob Carver releases a new line of Vacuum Tube Amplifiers





The new series of mono block amplifiers are the perfect blend of form and function and the ideal choice for serious music listeners. The Cherry 180 is conservatively rated at 180 Watts rms into 8 ohms, the Black Beauty 305 Watts rms.


Both were designed to drive the most demanding speakers. These two models offer extreme performance that is difficult to believe, and each amplifier features a high impedance input, an automatic DC restorer circuit, a “set and forget” bias adjustment, and low idle current which greatly increases output tube life. 
They have an ultra-wide bandwidth output transformers with interleaved windings capable of the most nuanced voice as well as huge peak output capacity. Selectable feedback control allows the user to change the sound of the amplifier from vintage classical to modern contemporary.


From a listening perspective these amplifiers provide a warm, rich sound with a sumptuous and enveloping sound stage, a great front to back depth of field, and very tight, pin-point imaging within that larger acoustic. A special current feedback circuit allows the amplifier to “listen to the room” via feedback from the speakers acting as microphones (using the law of reciprocity). The room-speaker-amplifier interaction provides a sense of believable ambience and acoustic space that is thoroughly realistic and quite enjoyable. Additionally, the transformer output impedance allows the signal to follow the impedance curve of the speaker system, allowing more voltage to be delivered to the loudspeaker at very low frequencies – providing an exceptional and satisfying low end response.


The VTA180M lists for $3,700, the VTA305M for $6,450 and will ship in October.


Cherry 180 (VTA 180M) Specifications:
Rated Power 200 watts into 8 ohms, 250 watts into four or two ohms
Gain 30 dB
Input impedance 100 kΩ
Frequency response 2 Hz - 85 kHz without filters
Power Bandwidth 24 Hz - 28 kHz
Distortion Less than 0.5%
A weighted noise -110 dB below rated output
Speaker outputs Two, four and eight ohms


Black Beauty (VTA 305M) Specifications:
Rated Power 305 watts into 8 ohms, 420 watts into four ohms, 450 watts into one or two ohms
Gain 30 dB
Input impedance 100 kΩ
Frequency response 2 Hz - 85 kHz without filters
Power Bandwidth 24 Hz - 28 kHz
Distortion Less than 0.5%
A weighted noise -110 dB below rated output
Speaker outputs One, two, four and eight ohms


Bob Carver

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