Found this schematic while browsing. Apparently it was made by a jazz player named Mark Smart (http://www.marksmart.net/gearhack/fenderizer/fenderizer.htm).
He said err.. wrote that it's a Fender Stage 160 preamp in a pedal. No distortion. Just Fender clean sound.
Thought I'd just share it here. Any comments would be appreciated.

Note: I haven't build it yet. So please don't ask me how it sounds.

Having built low wattage amps (Ruby & Little Rebel) with some degree of success, I am now looking to build bigger watt amps. I've downloaded Marshall MG15 schematic and intend to build the power amp section. The problem is that I can't figure the needed transformer's rating.

So here are the noobish questions:
What is the proper transformer's rating for this amp?
LM1875 datasheet says P out is 25W at +/-25V. Is it ok to use +/-25V? Will this amp actually deliver 25W instead of 15W if I use +/-25V?
I have a transformer with "1A" mark on it. It has dual 12V, 15V, and 18V outputs. Can I use it?
What happens if transformer's rating is below needed voltage and amperage? What happends if it is over/beyond?
How to decide the proper amperage rating from a chip's datasheet? I'm guessing I should not exceed max supply voltage, but cannot determine the needed amperage.

Sorry for the annoyingly confusing questions. I don't speak English very well and I AM a newbie in electronics. Any help would be VERY APPRECIATED.

Note: In my country, transformers are not rated in VA. They only marked 1A, 2A, 3A, 4A, 5A, and so on.

My friend said Little Rebel's tone control is too subtle. Can anyone explain what topology it is and suggest modifications? I just can't figure it out with my limited knowledge. xP

Having read Temuuk's book (great job Temuuk!), I am trying to change the tone control to active FMV. I also use the remaining op-amp as active low pass filter to cut high freqs. This IS my first attempt in modifying / designing an amp. Please point out any mistakes as I tend to copy & paste schematic fragments and glue them altogether. :duh
Any comments and suggestions are welcome.

I came across with this guitar amp schematic: http://www.redcircuits.com/Page52.htm. I am interested in making a preamp based on it.
Obviously I don't know if I'm doing it wrong, so any correction would be VERY APPRECIATED.
Can I power it with a 9V battery?

I was building this preamp: http://www.redcircuits.com/Page120.htm. Nice result indeed with battery pack. I even got good result with 9V battery (instead of 18V which is recommended). <3)

The problem started when I used a cheap wallwart adaptor. I got annoying hum which also distorts my lower notes. So I decided to make some kind of voltage regulator using LM317.
BUT I couldn't get rid of the hum. Thinking that I got a defective part, I replaced the LM317. Still same result. xP

Here are the measurements with analog voltmeter (intended output was 9V):
With 18V input, the output was around 15-16V.
With 12V input, the output was around 10V.

I guess there is no regulation at all. :duh

Could anyone point me any mistake I made? My plan is to make an internal voltage regulator in the preamp. I made it switchable between 9V and 12V. The schematic was taken from the LM317 datasheet.

Hi there...

I'm a newbie both in this awesome forum and in electronics. I need your opinion about my homemade amp.
It is basically a Little Rebel with jfet input buffer for better "clean" sound (not "true" clean as there is always some amount of distortion).

A "demo" video: http://www.youtube.com/watch?v=3BO4j-4KXXs (sorry about the bad playing). 

Any comment or suggestion will be VERY appreciated.