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[joecool85]

Well, my brother wanted a small bass amp, so I figured a TDA2003 circuit would work well...well, no.  It sucks actually lol.  Virtually no useable clean headroom, I would dare say the lm386 is better.  Its no looker either lol.





**edit**
I should say that it worked pretty well with guitar.  However, I like the lm386 better even though its not as loud.

[RDV]

Have you tried it with a strong(1 amp or better) supply? That'll get you more headroom.

RDV

[joecool85]

Yeah.  I tried it with a 10AH 12v battery, then 18v AA, neither one made a huge difference, although the 18volts was louder.

[mrk1]

I am also working on a tda2003 based amps i found that if you change the 2.2 ohm resistance for a 68 ohm and the 220 for 1k you get a clean sound. There is still some work to be done but really can play clean bass ,may need some type of freq cut off because at max volume it distorts a little when you play the big string. I use it to drive a speaker with amp sim pedal and fx .please post if you know how to fix big string issuse .

[J M Fahey]

Dear JoeCool. I think thay your BIG problem was not so much with the amp chip itself, but with the speaker. Guitars work anywhere, bass guitars donŽt. Please try it again (powered by the 12V battery) with two 6 or 8 inch woofers, 4 ohms each, in parallel (yes, the optimum load is 2 ohms), in a closed box at least 10" deep (WxH depends on speakers used).  YouŽll see that the result is more than usable. (No, not with a drummer ) Please try it and post the results . MP3s and pictures would be most welcome.