MAC Audio MAC 620 Mode D'emploi page 58

Power ratings
Power Output: 4 x 40 Watts max
Signal to Noise Ratio: 70dBA below reference (Reference: 1 Watt, 4-Ohms)
Frequency Response: 20 Hz - 20 kHz, -3dB. (Aux Input used as reference input)
Reference Supply Voltage: 14.4VDC
*Specifications subject to change without notice.
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