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Audio circuit diagrams
August 5, 2010
Designs for audio amplifiers with DC coupling to the load are not often encountered these days, even though they offer definite advantages. [more]
circuit from:http://www.extremecircuits.net/2010/05/dc-coupled-audio-amplifier.html
August 5, 2010
This circuit is intended to be placed in the same box containing the loudspeaker, forming a compact microphone amplifier primarily intended for speech reinforcement. A device of this kind is particularly suited to teachers, lecturers,... [more]
circuit from:http://www.extremecircuits.net/2009/07/speach-amplifier.html
August 5, 2010
The LME49830 EF125WT1 amplifier PCB module showcases National Semiconductor’s LME ultra-high fidelity power amplifier input stage ICs (drivers). The LME49830 is a fully complementary bipolar 200V input stage IC with 56mA (typical) of output current... [more]
circuit from:http://www.extremecircuits.net/2010/05/ultra-high-fidelity-high-power.html
August 5, 2010
Some lovers of High Fidelity headphone listening prefer the use of battery powered headphone amplifiers, not only for portable units but also for home "table" applications. This design is intended to fulfill their needs. An... [more]
circuit from:http://www.extremecircuits.net/2009/12/hiqh-quality-headphone-amplifier.html
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
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