Nikko TRM-750

I just bought another amplifier project. This Nikko TRM-750 Solid State Stereo Amplifier.

Can’t wait to get to work on this one. Maybe i’ll do a recap, but definately i’ll be doing some cleaning, because the previusly owner was a smoker and the amplifier hasn’t been used for some years now.

Nikko was in general the “high-end” of the mid-end range in the 70’s. But High Fidelity after modern standards. This TRM-750 is no exception.

I have been able to find the schematics for the amplifier, but i can’t seem to find the service manual. If anyone has it or knows where to find it, please let me know.

Visual Walk-through:


Power output: 75 watts per channel into 4Ω (stereo)
Frequency response: 20Hz to 30kHz
Total harmonic distortion: 0.15%
Damping factor: 50
Input sensitivity: 2.5mV (mic), 2mV (MM), 180mV (line)
Signal to noise ratio: 72dB (MM), 95dB (line)
Output: 150mV (line), 30mV (DIN), 1.3V (Pre out)
Speaker load impedance: 4Ω (minimum)
Semiconductors: 4 x IC, 30 x transistors, 19 x diodes
Dimensions: 400 x 143 x 310mm
Weight: 10.5kg

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