Bob Carver LLC

 

Black Magic 20

The Black Magic 20 stereo amplifier is the perfect blend of form and function and the ideal choice for serious music listeners. It is conservatively rated at 20 watts per channel in stereo mode and 40 watts in monoblock mode.

This stereo amplifier offers outstanding performance that is difficult to believe, with a high impedance input, an automatic DC restorer and bias circuit for each channel. Output tube idle current is very low, which greatly increases tube life. It has ultra-wide bandwidth output transformers with interleaved windings capable of the most nuanced voice as well as huge peak output capacity.

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, pinpoint 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.

SPECIFICATIONS

Number of Line Inputs: 1
Input impedance: 100 k ohms
Input Stage: 12AX7B current sourced low noise valve
Automatic DC Restoration: YES
Nominal Voltage Gain: 26 dB (into 8 ohms)
Output Stage Configuration: 1 complementary set of EL84M’s per channel
Regulated Screen Supply Voltage: 340V
Output tube plate voltage: 408V
Output Tube Idle Power: 10.6W
Rated Power: 20 watts per channel in stereo or 40 watts in mono
Noise: Better than 100dB A weighted referenced into 20 watts
Hum: -100 dB
Frequency Response: 8 Hz to 40 kHz (-3dB)
Full Power Bandwidth: 26 Hz to 43 kHz without filters
Distortion: Less than 0.5%
Output Transformer: Interleaved windings, super wideband low leakage inductance design
Output Impedance: 1.5 ohms
Speaker outputs: 4-16 ohms each channel
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
Weight: 19 lbs
Dimensions: 13” wide x 9” deep x 7” high,
Color: Black with silver fleck and brushed silver trim
Country of Origin: United States of America
Warranty: Amps 7 Years, Tubes 1 Year

 

 

CHERRY 180 ( VTA180MM)

 


180 Watt Mono Block Amplifiers - $7,400 pair

The Cherry 180 Mono Block Amplifier is the little brother of the Black Beauty 305 and provides the same sonic performance at a more affordable price point. This amplifier was designed to drive the most demanding speakers and 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. It has 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.

PRODUCT DOCUMENTATION

 

Recommended Preamplifier - Reference Linestage or Statement Linestage by Purity Audio Design

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 KT88s in a push-pull configuration (6 total)
Regulated Screen Supply Voltage: 360V
Output tube plate voltage: 725V
Output tube Idle Power: Less than 10W each
Bias Adjustment: Rear panel pot, front panel meter, set and forget
Rated Power: 200 watts into 8 ohms, 230 watts into four ohms, 215 watts into two ohms
Noise: Better than 110 dB A Weighted referenced into 180 watts
Frequency Response: 2 Hz to 85 kHz. Without filters
Full Power Bandwidth: 24 Hz to 28 kHz. Without filters
Feedback Control Switch: 20dB for Vintage 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: Check!
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
Weight: 84 pounds for a stereo pair, 42 pounds each
Dimensions: 12.5" width x 7.75" height x 17" depth
Color: Cherry Red with Champagne Trim
Country of Origin: United States of America
Warranty: Chassis - 7 Years, Tubes - 1 Year


 

BLACK BEAUTY 305 ( VTA305M )

 

305 Watt Mono Block Amplifier - $12,900 pair

The Black Beauty 305 Mono Block Amplifier is the perfect blend of form and function and the ideal choice for serious music listeners. This amplifier was designed to drive the most demanding speakers and 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. It has 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.

The Black Beauty 305 mono bloc amplifiers are available for audition at our affiliated partner, Jam'n Audio.  Please contact Joe Jurzec for details or to schedule an audition.

PRODUCT DOCUMENTATION

 

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 180 watts
Frequency Response: 2 Hz to 85 kHz. Without filters
Full Power Bandwidth: 24 Hz to 28 kHz. Without filters
Feedback Control Switch: 20dB for Vintage 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: Check!
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
Weight: 42 pounds
Dimensions: 12.5" width x 7.75" height x 17" depth
Color: Gloss black with Silver Trim
Country of Origin: United States of America
Warranty: Chassis - 7 Years, Tubes - 1 Year