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Low Power Auto Amp

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Gene

New Member
I am looking for a schematic for a small amp (20 watt to 4-8 ohm) that I can add to a loudspeaker in my car. The ideal circuit will be co-mounted with the speaker, accept the radio output (originally going to the speaker) as the input, operate from 12 volts, and output designed to drive a speaker. In other words, I want to cut the wire that now goes to the speaker and insert this little amp.

I did a search and found an ideal unit but the IC (TDA1554) is no longer available.

Any ideas? Please don't suggest a 600 watt thing with some #8 wires hooked to the car battery - I just want a little boost.
 

Gene

New Member
For some reason I am having trouble finding the Amp-on-a chip parts such as the TDAA1554 & TDA2005. I tried Jameco and Digikey with no results. Any suggestions?
 

john1

Active Member
You could try putting an extra speaker
in parallel.
 

Gene

New Member
Thanks to all. The ESP version looks simple and I have found the LM1875 ICs at Jameco. I will need to search for a power supply circuit that will use my car's 12 VDC and produce the +25, -25 volts required by the circuit but I'm ready to get going.

The plan is to beef-up the car's radio - but not with 1000 watts and giant speakers. Instead, I will be building a poor man's version of the current Bose car audio system. They are using single amps co-located with the speakers for some of their car audio - and they sound great.
 
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