Oh man!
Maybe it´s an idiot question...

But I didn´t understand that 22uf capacitor in R1.

Quote(You are most welcome- sorry I didn't get back sooner, been out of town!)

No problem!

QuoteIn the power supply, I'd use 2 4700 uF capacitors in parallel rather than one 6800 uF capacitor on each side of the bipolar supply.

Well, I was thinking to use an old computer power supply. It have 2 4700uf capacitors but I found 2 more capacitors on another power supply with the same value.
Question: More capacitance = no need for voltage regulators? Just 4700uf aren´t enough? Because 4 caps occupy lot of space.

The PC supply have 235W and normally it gives +12v 8A and -12v 0.8A. But if I change some components maybe I can have +15v with 2A. I don´t know if it´s limit is 12v. The -15v needs to be 2A too? Do I need a voltage regulator or isn´t necessary?

Do you suggest that I add your "High Impedance In Booster" schematic in this amp?

Do you recommend an "aux input" right before the VR2?

Sorry for so much questions!

Thanks for both.

Thanks man!

I just started studying electronic, but this amp is so simple and so good that I decided to build it.

This will be the first amp that I´ll build (hope that nothing explodes).

I have one question. Do I need to use heatsinks with the lm1785? Because it will work with only 15v.

Thanks again.