For your consideration, a pair of crimson red Bob Carver 305M Black Beauty monoblocks with upgrades. Serviced two months ago and given a clean bill of health by Bob himself.
Tube compliment: (12) new Tung Sol KT120, (2) Gold Lion 12ax7, (2) Gold Lion 12at7 and (2) Mullard 6AL5 tubes.
Upgrades include:
(2) 0.33uF 600V Jupiter copper caps
(4) 0.22uF 600V Jupiter copper caps
(2) 2uF 250V V-cap OIMP
(2) 10R 5W Kiwame
(2) 5R Mills MRA-5
(8) 450uF 450V Nichicon KX
(2) 3.3K Shinkoh Tantalum
(2) 22K Mills MRA-12
(2) 100uF 100V Elan Silmic
(2) 47uF 100V Nichicon KZ
6 ft. Jupiter cotton/copper wire
(2) Goldpoint 250K volume controls.
https://www.theabsolutesound.com/articles/carver-black-beauty-305-power-amplifierBlack Beauty 305W Mono Block Amplifier Specifications
Number of Line Inputs 1
Input impedance 100 k ohms
Input Stage 12AX7 current sourced long tailed balanced pair
Pre-driver Stage 12AT7 current sourced long tailed balanced pair
Automatic DC Restoration 6AL5
Nominal Voltage Gain 30 dB (into 8 ohms)
Output Stage Configuration 3 complimentary sets of KT120s in a push pull configuration (6 total)
Regulated Screen Supply Voltage 390V
Output tube plate voltage 785V
Output tube Idle Power Less than 14W each
Bias Adjustment Rear panel pot, front panel meter, set and forget
Rated Power 305 watts into 8 ohms, 330 watts into four ohms, 290 watts into
two ohms
Noise Better than 110 dB A Weighted referenced into 305 watts
Hum -100dB
Frequency Response 2 Hz to 85 kHz. (-3dB)
Full Power Bandwidth 24 Hz to 28 kHz. Without filters
Feedback Control Switch 20dB for Classic Amplifier Sound
11 dB for Contemporary Amplifier Sound
Distortion Less than 0.5%
Output Transformer Interleaved windings, super wideband low leakage inductance design
Output Impedance 1.3 ohms
Speaker outputs 2, 4, and 8 ohm terminals
Built in Output Tube tester Yes
Construction Method Point-to-Point hand wired axial and radial leaded components
with star grounds and no circuit board traces or de-plugable
connectors.
Components High reliability wire wound and metal film resistors
Metal polyester capacitors in the audio signal paths
Dimensions 14” long by 12.5” wide by 7.2” tall
Weight 84 pounds (38 kg) for a stereo pair, 42 pounds (19 kg) each
Color Gloss black with Silver Trim
Country of Origin: United States of America
Warranty: Chassis - 7 Years, Tubes – 1 Year
Original boxes and manual. Cash or PP Friends & Family preferred. Buyer pays shipping fees.
