PIONEER M-75 / SPEC 4 Stereo Power Amplifier Vintage 1977 300Watts RMS Good Look

PIONEER M-75 / SPEC 4 Stereo Power Amplifier Vintage 1977 300Watts RMS Good

Look

Article manufactured for the Japanese market, it originally worked at 100 volts but was revised and modified by our specialized technical service to work in Europe at 220/240 volts, it is completely revised and works perfectly. All the main components are original.

Pioneer M 75 / (Japanese Versión of Spec-4)

Stereo Power Amplifier (1977-80)

Description

The M-75 employs DC construction which excludes capacitors from the NFB circuits and uses a dual transistor differential amplifier with a current mirror circuit in the 1st stage.

This provides a stable operation and also high gain over a wide frequency range.

The pre-driver stage is a class A circuit with a regulated current circuit for the load.

This makes for high gain amplification with superior linearity.

Furthermore, there is an overdrive limiter and power limiter circuit which is designed to protect the power transistors and make for added reliability.

Specifications

Power output: 150 watts per channel into 8Ω (stereo)

Frequency response: 5Hz to 100kHz

Total harmonic distortion: 0.01%

Damping factor: 100

Input sensitivity: 1V

Signal to noise ratio: 115dB

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 2 x IC, 61 x transistors, 62 x diodes

Dimensions: 480 x 187 x 445mm

Weight: 24.5kg