Audio power amplifier schematics

• 100W Amplifier
  
• 18W Audio amplifier
  
• 25W MOSFET amplifier
  
• Headphone amplifier
  
• Portable headphone amplifier
  
• 2W amplifier
  
• 4W amplifier
  
• 8 watt audio amp
  
• 20W Amplifier
  
• 50W Amplifier
  
• Amplified ear
  
• Two transistor audio amplifier
  
• Personal stereo audio amp
  
• Headphone amplifier
  
• 1.5W Audio amplifier
  
• Low-level audio amp
  
• 10W amplifier
  
• 80W amplifier
  
• LM383 12V Amplifier
  
• 100W Audio amplifier
  
• 100W RMS Amplifier
  
• 2-Channel Power Amplifier
  
• Push-Pull Class A Amp using type 5687 dual triodes
  
• Push-Pull Class A 2A3 Stereo Amp
  
• Single Ended Class A2 SV811-10 Stereo Amp
  
• JLH Headphone Amplifiers
  
• Audio amplifier output relay delay
  
• Spatial Distortion Reduction Headphone Amp
  
• HeadBanger Headphone Amp
  
• 2W Amplifier
  
• TDA2030 8 Watt amplifier
  
• Headphone distribution amp
  
• Headphone monitor amp
  
• Bi-Directional 2.4 GHz One Watt Amplifier
  
• Bi-Directional 900Mhz One Watt Amplifier
  
• 20 Watt GaAaFET Power on 2.3 GHz
  
• 1 Watt 2.3 GHz RF Amplifier Using a MRF2001
  
• 2.3 GHz Power Amplifiers
  
• 2304 and 3456 MHz Power Amplifiers
  
• 16 Watt amplifier
  
• 8 Watt amplifier
  
• Power amp schematic (PDF)
  
• 20 Watt Class-A Power Amplifier
  
• El-Cheapo - A Really Simple Power Amplifier
  
• Single Chip 50 Watt / 8 Ohm Power Amplifier
  
• Hi-Fi Headphone Amplifier
  
• 100W Guitar Amplifier
  
• Death of Zen (DoZ) - A New Class-A Power Amp
  
• Soft-Start Circuit For Power Amps
  
• Thermo-Fan To Keep Your Amp Cool
  
• Audio Amp Output Power Limiter
  
• 55W (Originally 75W) Power Amplifier
  
• 300W Subwoofer Power Amplifier
  
• 20 Watt / Channel Stereo Power Amplifier

Source : http://www.district87.org/staff/waltonm/CircuitAnalysis/Electronic%20circuit%20schematics.htm
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HA1377 Bridge Amp BCL 17W

Circuit HA1377 Bridge Amp BCL 17W

PCB HA1377 Bridge Amp BCL 17W

TDA2005 Amplifier Car audio BCL 20W

The Circuit TDA2005 Amplifier for Car audio BCL (ฺBride Amplifier) 20W.
Volt supply 11V to 14V, Power output 10W+10W#, for Speaker 2-8 ohm.

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TDA2005 Amplifier Car audio BCL 20W

TDA2004 Amplifier Car audio stereo OTL 10W+10W

The Circuit TDA2004 Amplifier Car audio stereo OTL 10W+10W.
Volt supply 11V to 14V, Power output 10W+10W#, for Speaker 2-8 ohm.

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TDA2004 Amplifier Car audio stereo OTL 10W+10W

TDA2003 Amplifier BCL (Low cost) 18W for CAR

The Circuit TDA2003 Amplifier BCL (bridge amplifier) 18W for CAR CAR RADIO AUDIO.
Volt supply 10V-14V, Power output 18W, for Speaker 2-8 ohm.

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TDA2003 Amplifier BCL (low cost) 18W for CAR

TDA2003 Amplifier Car Audio OTL 10W

The Circuit TDA2003 Amplifier BCL 10W CAR RADIO AUDIO.
Volt supply 10V-14V, Power output 8W, for Speaker 2-8 ohm.

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TDA2003 Amplifier Car Audio OTL 10W

TDA2003 Amplifier Car Audio OTL 10W

The Circuit TDA2003 Amplifier OTL 10W CAR RADIO AUDIO.
Volt supply 10V-14V, Power output 8W, for Speaker 2-8 ohm.

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TDA2003 Amplifier Car Audio OTL 10W

TDA2002 Amplifier 8W CAR RADIO AUDIO

The Circuit TDA2002 Amplifier 8W CAR RADIO AUDIO.
Volt supply 10V-14V, Power output 8W, for Speaker 2-8 ohm.

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TDA2002 Amplifier 8W CAR RADIO AUDIO

TDA1910 Amplifier OTL 10W - with muting

The circuit TDA1910 Amplifier OTL 10W - without muting.
Volt supply 10V-14V, Power output 10W, for Speaker 2-8 ohm.

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TDA1910 Amplifier OTL 10W - with muting

TDA1910 Amplifier OTL 10W - without muting

The circuit TDA1910 Amplifier OTL 10W - without muting.
Volt supply 10V-14V, Power output 5W, for Speaker 2-8 ohm.

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circuit TDA1908 Amplifier CAR AUDIO OTL 8W

The circuit TDA1908 Amplifier CAR AUDIO OTL 8W.
Volt supply 10V-14V, Power output 5W, for Speaker 2-8 ohm.

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TDA1908 Amplifier CAR AUDIO OTL 8W

TDA1905 Amplifier CAR Audio OTL 5W

The circuit TDA1905 Amplifier CAR Audio OTL 5W.
Volt supply 7-14V, Power output 5W, for Speaker 2-8 ohm.

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TDA1905 Amplifier CAR Audio OTL 5W

TDA2005 Mono Power Amp 20W BCL

This circuit use IC TDA2005 ,Car amplifier 10W BCL circuit.
For supply volt 12V battery car.

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PCB - TDA2005 Mono Power Amp 20W

20 Watt Power Amplifier

This IC chip was designed specifically for use in power boosting applications in automobiles. It is self protecting against short circuits and thermal problems. In the bridge configuration shown it will deliver 20 watts of power into a 2 ohm speaker operating at 14.4 volts.

From :: http://home.maine.rr.com/randylinscott/may98.htm