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Audio amplifier circuit diagrams
August 5, 2010
This amplifier can be directly connected to CD players, tuners and tape recorders. It is tested with several headphone models of different impedance: 32, 100, 245, 300, 600 & 2000 Ohm. Schematic shows left channel... [more]
circuit from:http://www.extremecircuits.net/2009/08/portable-headphone-amplifier-circuit.html
August 5, 2010
The mentioned shunt-feedback configuration also allows the easy addition of frequency dependent networks in order to obtain an useful, unobtrusive, switchable Tilt control (optional). When SW1 is set in the first position a gentle, shelving... [more]
circuit from:http://www.extremecircuits.net/2009/12/pure-class-headphone-amplifier.html
August 5, 2010
Apart from the obvious usage as a headphone amplifier, the circuit can be used for a range of applications where a wide bandwidth low power amplifier is needed. The circuit is based on an opamp,... [more]
circuit from:http://www.extremecircuits.net/2009/09/stereo-headphone-amplifier-circuit.html
August 5, 2010
Here's a top-class headphone amplifier that can drive high or low impedance 'phones to full power levels, with very low noise and distortion. For best performance, it can be teamed with the Stereo Preamplifier described... [more]
August 5, 2010
This low-cost, general-purpose electronic hearing aid works off 3V DC (2x1.5V battery). The circuit can be easily assembled on a veroboard. For easy assembling and maintenance, use an 8-pin DIP IC socket for TDA2822M. [more]
circuit from:http://www.extremecircuits.net/2009/07/low-cost-hearing-aid.html
August 5, 2010
This circuit, connected to 32 Ohm impedance mini-earphones, can detect very remote sounds. Useful for theatre, cinema and lecture goers: every word will be clearly heard. You can also listen to your television set at... [more]
circuit from:http://www.extremecircuits.net/2009/06/amplified-ear_28.html
August 5, 2010
Commercially available hearing aids are quite costly. Here is an inexpensive hearing aid circuit that uses just four transistors and a few passive components. [more]
circuit from:http://www.extremecircuits.net/2009/07/hearing-aid.html
June 23, 2010
This add-on board is designed to provide a pair of balanced audio outputs for the High-Quality Stereo DAC (Digital to Analog Converter). Two 3-pin male XLR connectors are used for the new outputs and they... [more]
circuit from:http://www.extremecircuits.net/2010/03/balanced-output-board-for-stereo-dac.html
June 22, 2010
Tendency of catering: 15V Force of expense: 4,2Wrms in the 4W Minimal signal of entry: 94mVp-p with preamplifier, 0,65Vp-p without the preamplifier. [more]
June 22, 2010
Amplifier 2x30W with STK465. Small number of components. [more]
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