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Marantz 1150

Stereo Console Amplifier (1976-77)

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Marantz 1150


Power output: 75 watts per channel into 8Ω (stereo)

Frequency response: 15Hz to 50kHz

Total harmonic distortion: 0.1%

Input sensitivity: 1.8mV (mic), 1.8mV (MM), 180mV (line)

Signal to noise ratio: 78dB (MM), 88dB (line)

Output: 0.775mV (line)

Speaker load impedance: 8Ω (minimum)

Dimensions: 376 x 144 x 301mm

Weight: 14.8kg


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Marantz 1150


I'm working on my old marantz 1150 amplifier with sometimes i have some "bangs" on the X9 preamp. I'll try to find the problem, but from now, i think i have to rework the mechanics.

Thanks for the schematics with exploded view. With these elements, i'll dismount everything, remove the rust, change screws with new ones without the work to made a photo at each step.

The second work will be to "re solder" all the boards and change components if they are under their working capacities. Maybe for the electrolitics capacitors with 125°c range and under voltage about 50%, Changing by COG... Not thinking changing tantalium as by experience these ones are good ones.

For the adjustable resistors and "F2 ultra" I'm in doubt????? maybe i'll change for ceramics support.

Thanks again

Jean Cil

re: 1150

Thank you rery much .

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