9W Power Amplifier by TDA1010
The TDA1010 is a monolithic integrated class-B audio amplifier circuit in a 9-lead single in-line (SIL) plastic package. The device is primarily developed as a 6 W car radio amplifier for use with 4 Wand 2 Wload impedances. The wide supply voltage range and the flexibility of the IC make it an attractive proposition for record players and tape recorders with output powers up to 10 W.
Read More Source:http://www.elektroda.net/audio/uklady/tda.html
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10-14W Class A amplifier by TIP3055
I have built this amplifier and it does sound good. It requires a preamp as it hasn’t got much gain. It requires big heat sinks and a large transformer and a great power supply and careful wiring, but in the end it is extremely simple and it sounds very good. The zener diode rejects any ripple coming from the power supply, But you still only want a ripple of 10mV max. The ripple reaching the input is amplified, so the zener gets rid of that, but whatever ripple there is will still reach the power stage.
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Read More Source:
http://mrcshobbies.blogspot.com/
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3W HI-FI Stereo Amplifier by 2N1613
Tr1 and Tr2 transistors funcitons as direct coupled voltage amplifiers. R6 resistor, D1 and D2 diodes determine the standby current of complement driver stage (Tr3/Tr4) and output stage (Tr5/Tr6). C3, C5, C6 and R3 help keeping stability. Amplifier’s input sensitivity is 400mA at 4 ohm load and 12V supply and 600mV at 8 ohm load and 17V supply.
Gain can be increased by decreasing R4 value but it is not recommenden bacause of increasing distortion.
Read more source:http://www.circuit-projects.com/3-watt-hi-fi-stereo-amplifier.html
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Categories: Power Amplifier Tags: Low watt amplifier, OTL-AMP, stereo amplifier
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