Audio - amplifiers

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Speaker Mic Circuit
Speaker Mic Circuit
June 5, 2013

This circuit takes an ordinary loudspeaker and allows it to be used in reverse, as a microphone. [more]

2 Watt Amplifier
2 Watt Amplifier
August 27, 2010

A 2 Watt audio amplifier made from discrete components. [more]

ECM Mic Preamplifier
ECM Mic Preamplifier
August 27, 2010

A microphone amplifier that may be used with either Electret Condenser Microphone (ECM) inserts or dynamic inserts, made with discrete components. [more]

TDA2030 8w Amplifier
TDA2030 8w Amplifier
August 27, 2010

An 8 watt amplifier made with the TDA2030 IC. Build two such units for a stereo amplifier [more]

Hi-Fi Preamplifier
Hi-Fi Preamplifier
August 25, 2010

Circuit has an exceptionally fast high frequency response,as demonstrated by applying an 100kHz squarewave to the input [more]

Quadraphonic Amplifier
Quadraphonic Amplifier
August 25, 2010

This is a four channel amplifier ideally suited for use with quadraphonic equipment such as a Sound Blaster Live card. There is no volume control,audio levels being directly controlled from the sound card itself. [more]

15 Watt Amplifier
15 Watt Amplifier
August 24, 2010

A 15 watt amplifier made using discrete components [more]

Amp with Tone Controls & Soft Switching
Amp with Tone Controls & Soft Switching
August 24, 2010

Built around an LM380, this amplifier includes tone controls and electronic "soft switching". The soft switching circuitry ensures power is built up gradually eliminating the dc thump. [more]

Dynamic Microphone Preamp
Dynamic Microphone Preamp
August 24, 2010

A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm output impedance. [more]

Headphone Amplifier
Headphone Amplifier
August 24, 2010

An amplifier to drive low to medium impedance headphones built using discrete components. [more]

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