quick question, does TDA2003 or TDA2005 need a regulated powersupply?

quick question, does TDA2003 or TDA2005 need a regulated powersupply?

thanks again for the suggestions. a little bit of humming is fine i think, due to sometimes in a lot of places, earth ground zero-ohm is hard to achieve, so there should be something like 0.44ohm is the best thing you can get.

Now, i have read somehwere on the net, split supply for the DC source might help to overcome hum and noise problem, is this true? haven't tried it, maybe i will try it just for proof 

I only built half of your circuit, which mean only using 1xTDA2003 on a 4ohm speaker, not too loud but enough. For the preamp, i took a schematic of MicroAMP circuit, i have tested them, works well. But before that, i did try to make a bridge configuration from the datasheet schematic, not successful, everytime i plugged in the power, noise coming out of the speaker, couldnt figure out why.

anyway, TDA2003 is very simple amp to build...!! thanks! now i am building my seffect (distortion-compressor-reverb) in one box.

I have read this somewhere that the DC ground supposed to be separated from the amp and tonemender, which mean using a different supply.

and yup, i supply the amp and tonemender and fx using a single powersupply.

hey, thanks again, i found the datasheet and i will try to bridge my 2xTDA2003 amp. Regarding to the tonemender i builted, maybe using TL072 was the problem, should change to a better low noise dual opamp.

Basically, I only need a preamp with tone control.

I have use a single side pcb and solder everything i need to ground over that one piece of pcb, this type of technique i also use to build RF circuits, sometimes its called dead-bug style. there is a similar technique called manhattan technique, which use several small cutted pcb to make island as a soldering pad.

everytime i put the overdrive circuit in place, between the preamp and amp, humming noise comes out from my amp, does anybody knows why?

by the way, can I bridge the output from two TDA2003 into one 4ohm speaker?

without the tonemender no noise coming out from the amp. when i plug my guitar a short hummm is normal. without the guitar attached to the pre-amp (tonemender) noise is coming out from the amp. my intention was to build a tonestack before the guitar. and yes, the guitar input was grounded when no jack is plugged.

I guess i just build a simple 3knobs tonestack with a transistor pre-amp, maybe this would solve my problem.

thank you all for the help, lets see how it goes.

I succesfully build the amp, also the preamp using the tonemender. I try to plug my guitar directly to the amp, it produce great clean sound, but when i try to hook up the tone mender before the amp, withouth plugging in my guitar it produce noise sound and humming.

Is pre amp design prone to low frequency signal? like RF signal sometime giving oscilation or something?

i dont really understand electronics, but from what i see, the front stage was with a FET pre-amp, can i eliminate this, and use other pre-amp? or the FET stage is critical?

I have built the tda2003 stage, and put an 8ohm speaker on each output, plug it to my electric-acoustic guitar, it already made a loud sound.

the pre-amp that i was thinking is the Tonemender from runoffgroove.com

thanks.