STEG QM75.4 Amplifier

4 Channel Class AB Amplifier, 420 Watts

When factory stereo isn?t quite loud enough, adding an amp is the solution. At 75 watts x 4 @ 4 ohms, the QM75.4 offers more than enough power to wake up factory speakers. It has built-in crossovers to protect those speakers from playing frequencies that they can?t handle. If the system has aftermarket speakers, even better. The QM75.4 can handle them too, and when required has even more available power, making 105 watts x 4 @ 2 ohms.



Power RMS:

  • 4 ohms: 75 watts x 4

  • 2 ohms: 105 watts x 4

  • 4 ohms: 210 watts x 2 BTL

Frequency Response:

S/N Ratio: >95dB

Distortion (THD): <0.1

Input Sensitivity: 500mV-8V

Fuse: 60A Internal

Crossover: Hi-Pass and Low-Pass

Slope: 12dB/octave


  • Hi-Pass 35Hz-3.5kHz

  • Low-Pass 15Hz-3.5kHz

Bass Boost: 0-12dB @ 45Hz

Dimensions: 13.1×7.2×2.2 inches

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