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Manufacturers Specifications

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Yamaha MX-1
Power output: 200 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.008%

Damping factor: 250

Input sensitivity: 1.46V

Signal to noise ratio: 125dB

Dimensions: 438 x 116 x 486mm

Weight: 24kg

Year: 1993
That’s a BEAST!
 
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Yamaha M-2
Specifications
Power output: 240 watts per channel into 8Ω (stereo)

Frequency response: 1Hz to 100kHz

Total harmonic distortion: 0.004%

Input sensitivity: 1.62V

Dimensions: 435 x 183 x 362mm

Weight: 20.9kg

Year: 1979

I have one of those! Excellent amp.



Since we're playing Yamaha now here's my B-2x

Power output: 170 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 100kHz
Total harmonic distortion: 0.002%
Damping factor: 200
Input sensitivity: 1.3V
Signal to noise ratio: 124dB
Speaker load impedance: 4Ω to 8Ω
Dimensions: 435 x 164 x 422mm
Weight: 28kg
Year: 1985

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I have one of those! Excellent amp.



Since we're playing Yamaha now here's my B-2x

Power output: 170 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 100kHz
Total harmonic distortion: 0.002%
Damping factor: 200
Input sensitivity: 1.3V
Signal to noise ratio: 124dB
Speaker load impedance: 4Ω to 8Ω
Dimensions: 435 x 164 x 422mm
Weight: 28kg
Year: 1985

View attachment 1336643
Seems like all the BIG BOYS are coming out to play tonight. Nice!
 
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Yamaha M-80
Specifications
Power output: 250 watts per channel into 8Ω (stereo) (Actually 297wpc--;) )

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.003%

Damping factor: 250

Input sensitivity: 1.55V

Signal to noise ratio: 127dB

Dimensions: 435 x 165 x 425mm

Weight: 23kg
 
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Soundcraftsmen A5002

Specifications

Power output: 250 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.09%

Damping factor: 100

Input sensitivity: 1.2V

Signal to noise ratio: 110dB

Speaker load impedance: 2Ω (minimum)

Dimensions: 19 x 7 x 15 inches
 
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Yamaha M-80
Specifications
Power output: 250 watts per channel into 8Ω (stereo) (Actually 297wpc--;) )

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.003%

Damping factor: 250

Input sensitivity: 1.55V

Signal to noise ratio: 127dB

Dimensions: 435 x 165 x 425mm

Weight: 23kg
Another heavyweight world champion!!!
 
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Carver "Cube" M400

Power output: 201 watts per channel into 8Ω (stereo), 500W into 8Ω (mono)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.05%

Damping factor: 150

Input sensitivity: 1.5V

Signal to noise ratio: 100dB

Weight: 12lbs

Finish: black anodized

Year: 1980
 
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Carver "Cube" M400

Power output: 201 watts per channel into 8Ω (stereo), 500W into 8Ω (mono)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.05%

Damping factor: 150

Input sensitivity: 1.5V

Signal to noise ratio: 100dB

Weight: 12lbs

Finish: black anodized

Year: 1980
and in this corner, featherweight champion of the world, “Cube”!
That only weighs 12 lbs and puts out 500 watts mono?
 
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