• 4-Ohms: 37.5 Watts per channel continuous power, both channels driven into 4 Ohms from 20 to 20,000 Hertz, with less than 0.05% THD+N (Total Harmonic Distortion plus Noise). 
• 4-Ohms: 60 Watts per channel continuous power, both channels driven into 4 Ohms at 1000 Hertz, with less than 10% THD+N. 
• 2-Ohms: 60 Watts per channel continuous power, both channels driven into 2 Ohms from 20 to 20,000 Hertz with less than 0.10% THD+N. 
• Frequency response: 20 to 20,000 Hertz ± 1.0 dB Bandwidth: 15 to 100,000 Hertz ± 3 dB 
• Damping Factor: 

At circuit board: Over 200 (referred to 4 Ohms). 
At speaker lead: Over 50 (referred to 4 Ohms). 

• Signal to noise ratio: Over 80 dB, unweighted. 
• Slew factor: over 5 
• IM Distortion (IHF): Less than 0.05% 
• Input Gain: Variable from 40 dBV to 14 dBV. Factory pre-set at 28 dBV 
• (correct for most 500 millivolt-rated source units). 

Bass Boost: 0 to +18 dB Maximum at 45 Hertz. 

Treble Boost: 0 to +12 dB Maximum at 20,000 Hertz. 

The Punch 75 MOSFET is protected by two 5-Ampere speaker-line fuses and by a 15 Ampere battery fuse. A thermal switch shuts down the amplifier in case of overheating. Internal circuitry limits power in case of overload. 

DIMENSIONS: 

7.6" long by 8.6" wide by 2.2" high, exclusive of knobs and wiring. (193mm long by 218mm wide by 56mm high) NOTE: