Circuit diagram 50W-70W Power Amplifier with 2N3055 MJ2955
Power Supply Power Amplifier 2n3055 MJ2955 wiring and pcb layout design
Could you read specification thus as below.
- Output Power 50 watts into 8Ω 70 watts into 4Ω
- Music Power 77 watts into 8Ω ;105 watts into 4Ω
- Frequency response -1dB at 14Hz and 70kHz (at 1W- see Fig.1)
- Input sensitivity 0.875V for 50Ω into 8Ω
- Harmonic distortion <.05% from 20Hz to 20kHz; typically <.003%
- Signal-to-Noise Ratio -114dB unweighted (22Hz to 22kHz); -119dB A-weighted, both with respect to 50W into 8Ω
- Damping factor >140dB at 100Hz & 1kHz, with respect to 8Ω and without PTC thermistor
- Protection fuses plus “Polyswitch” PTC thermistor .