Specs per Rockford Fosgate:
-4 Ohms - 22.5 watts per channel continuous power, both channels driven into 4 Ohms from 20-20,000Hz with less than 0.05% THD
-4 Ohms - 40 watts per channel continuous power, both channels driven into 4 Ohms at 1000Hz with less than 10% THD
-2 Ohms - 35 watts per channel continuous power, both channels driven into 2 Ohms from 20-20,000Hz with less than 0.1% THD
Frequency Response - 20-20,000 Hz +/- 1dB
Bandwidth - 15 - 100,000 Hz +/- 3dB
At Circuit Board - over 200 (at 4 Ohms)
At Speaker Lead - over 50 (at 4 Ohms)
Signal to Noise Ratio - Over 80dB unweighted
Bass Boost: 0 to +18dB maximum at 45Hz
Treble Boost: 0 to +12dB maximum at 20,000Hz
The Punch 45HD Mosfet is protected by two 3-Amp speaker inline fuses and by a 15-Amp battery fuse. A thermal switch shuts down the amplifier in case of overheating. Internal circuitry limits power in case of overload.
6.6" Long x 8.6" Wide x 2.2" High
Again, I've done a video overview of this amplifier. Just displaying the amp, connections and some facts about the amp. Also, I incorrectly mentioned the actual specs from the "birth sheet". It stated 91 watts/ch into 2 Ohms (not 92 as I mentioned) I'll do a sound test in an upcoming video, so stay tuned! I also have other tests including Punch 30, 75, 150, a few newer amps and a Hafler MSE88tn.
YouTube - Rockford Fosgate Punch 45HD - Old School Cheater Amp!