There are 86 circuit schematics available in this category. Click here for all circuit diagrams. Last circuit added on Thursday, 30 July 2015.

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CircuitCategoryDate AddedOK?Votes 
LM380 2.5 watt audio amplifier circuitAmplifiers 3
Stereo audio amplifier based on TDA2822MAmplifiers 0
13.5 Watt Power Amplifier using a TL081 opamp and TIP125 / TIP120 power transistorsAmplifiers -1
Single supply op-amp audio amplifierAmplifiersJun 24, 20151
DPA 220 amplifier schematicAmplifiers 0
Low impedance microphone amplifierAmplifiers 0
DPA 440 amplifier schematicAmplifiers 0
100W audio amplifier including PCB layoutAmplifiersApr 14, 2011-1
Quadraphonic Amplifier based on pair of LM1877 devicesAmplifiers -1
DPA 880 amplifier schematicAmplifiers 0
Class-A/AB Amplifier delivering 100W into a 4 ohm loadAmplifiers -1
25 Watt MOSFET Audio Amplifier using IRF532 / IRF9532 hexfet transistors for output stageAmplifiers 0
Easy to build DIY 50W amplifier based on ICL8063Amplifiers 0
Audio VU Meter based on pair of LM324 quad opampsAmplifiers 1
20 Watt Audio Power Amplifier using TDA2005MAmplifiers 1
22 Watt Stereo Amplifier using TDA1554Amplifiers 0
Two Transistors Audio AmplifierAmplifiers 1
10 Watt Audio Amplifier circuit diagramAmplifiers 0
30-Khz Bandwidth High Linearity Opto-Isolated AmplifierAmplifiersJan 08, 20140
Compact 3W BTL Audio Power Amplifier TDA7056AmplifiersOct 03, 2013-1
Sound alarm based on LM741 opamp and LM386 amplifierAmplifiersFeb 09, 20100
Small audio amplifier based on LM386AmplifiersJan 31, 20100
Super mixer with microphone input / amplifier including a PCB layoutAmplifiersFeb 20, 20101
10-30 watt stereo audio amplifier circuitAmplifiersJul 03, 20110
2W / 4W audio amplifier using pair of LA4100, LA4101 or LA4102 modulesAmplifiersMay 25, 20121
Simple Class A Amplifier - 10W audio outputAmplifiersJan 22, 20101
Bridging Adapter For Audio Power AmplifiersAmplifiersJan 29, 20100
Power Amplifier Clipping Indicator Circuit DiagramAmplifiersJan 29, 20100
Soft-Start Circuit For Power AmpsAmplifiersMar 30, 20100
Variable Amplifier ImpedanceAmplifiersMar 30, 20100
CMoy pocket headphone amplifierAmplifiers 0
Regulatable audio amplifier using a 741opampAmplifiers 0
Bass EQ pre-amp correction for high impedance ceramic crystal pickupAmplifiers 0
12 watt audio amplifier with tone using TDA1020Amplifiers 0
5 watt audio amplifier using TDA1010Amplifiers 0
1 Watt audio amp using a TDA7052Amplifiers 0
Headphone amplifier based on 12AX7 tubesAmplifiers 0
Six-channel Mixer and AmplifierAmplifiersJan 31, 20031
Voltage controlled amplifierAmplifiersAug 12, 20010
30W ultra-low distortion audio power amplifierAmplifiersJan 22, 20100
Circuit diagram for 8 watt audio ampAmplifiersJan 26, 20011
22 Watt Audio Amplifier using TDA1554 two channel audio amp chipAmplifiersSep 01, 20090
50 Watt Amplifier circuit diagramAmplifiersSep 01, 20091
150W audio amplifier that's cheap to build using TIP142 / TIP147 Darlington power transistorsAmplifiers -1
Crest Audio LT Series LT100, LT1500 and LT2000 Schematic Set - class D amplifier (PDF)AmplifiersMar 17, 20100
Tube amplifierAmplifiersAug 14, 2002-1
H-Bridge Power Amp circuit diagram and SPICE simulation filesAmplifiersJan 17, 20110
Basic Audio Amplifier including a SPICE modelAmplifiersApr 11, 2011-1
100W RMS Amplifier circuit diagramAmplifiersJan 26, 20010
Super Simple 3 Watt Audio Power Amplifier based on TDA1015AmplifiersNov 13, 20100
Voice AmplifierAmplifiers 0
25W MOSFET audio amplifierAmplifiersFeb 21, 20050
50W audio amplifier using ICL8063AmplifiersFeb 21, 20050
Amplified ear for surveillanceAmplifiersFeb 21, 20050
Miniature audio amplifierAmplifiers 0
Audio amplifier output relay delayAmplifiersJan 26, 20010
Use amplifier phono input as line level inputAmplifiersJan 26, 20010
DC Fault Protection Circuit for Audio AmplifiersAmplifiersJan 29, 20100
110mW emitter follower audio power amplifierAmplifiersJan 22, 20100
NE555 drives a speakes: Pulse Width Modulation AmplifierAmplifiersMar 30, 20100
Spatial Distortion Reduction Headphone AmpAmplifiersJan 31, 20030
Actvie speaker based on a dual op-amp (LM833) and TDA2030 power ampAmplifiers -1
4 channel power amplifier with bi-amping and bridging optionsAmplifiers 1
Amplifier based on LM4780 including a thermal shutdown featureAmplifiers 0
HeadBanger Headphone AmpAmplifiersJan 26, 20010
Headphone monitor ampAmplifiersJun 08, 20020
50W audio power amplifier circuit diagramAmplifiersJun 20, 20040
High quality exponential VCAAmplifiersApr 17, 20040
Selection of Integrated Circuit Audio AmplifiersAmplifiers 0
Potpourri of Transistor Audio Amplifier CircuitsAmplifiers 0
16 Watt audio amplifier using pair of 8 watt LM383 audio amplifier chipsAmplifiersJan 26, 20010
8 watt amplifier circuit diagramAmplifiersJan 26, 20010
Magnetic cartridge amplifierAmplifiersJan 26, 20010
Speech Amplifier BoxAmplifiers 0
Mini-MosFet Audio AmplifierAmplifiersMar 05, 2009-1
Low power audio amplifier circuit based on LM386AmplifiersJan 29, 20100
Two 9v battery-powered amps based on the LM386. Schematic and PCB/perfboard layouts.Amplifiers 0
Ruby is an "enhanced" version of the Little Gem battery-powered amplifier (LM386 based design)AmplifiersSep 30, 20091
Low power audio amplifier using BC109C along with BD679 and BD680 Darlington pairsAmplifiers 0
10 watt audio power amplifier using discrete transistors (includes PCB layout)Amplifiers 0
Hammonator Organ to Guitar Amp Conversion (tube amplifier)AmplifiersSep 07, 20090
Five Tube Stereo AmplifierAmplifiersSep 13, 20060
2W Audio Amplifier using BD139 and BD140 transistorsAmplifiersJan 26, 20010
Peak reading audio level meter using CA3140 opampAmplifiersJan 26, 20010
TDA2030 8 Watt amplifierAmplifiersJan 26, 20011
Collection of eight audio amplifier circuit diagramsAmplifiersJul 05, 20150