Picture of DIY cheap solid-state amplifier (from salvaged parts)
Living in a third-world country, amplifiers like marshall, fender, line6, peavey and others are just too expensive for poor guitar players like me, since most amps are toys for the rich boys. So with a mix of inspiration and imagination I came up with this design and idea. I always wanted to have an Amp head since they look way cooler than combo amps, so this gave me an inspiration for my new build an amp head, (this instructable can also be used for making a combo amp).

If you have any practice amps that you have not used or somehow not working anymore, then it is the best time to give it a make-over, I'll give you an inspiration on how to give your amp a new breathe of life.

In this instrcutable I will build an amplifier out of salvaged parts from existing guitar amp that I have and add other circuits to give new sound to the amp. One good thing about this is that it is cheap.

I salvaged a damaged 10watt practice amp and a 150watt PA amp that I have a long time ago, I made other circuits to give the old amp a new sound.

You have the option to build it in a combo type manner or a cool looking amp head.
lsakaguchii20 days ago
Sir. I made a LM386 but its just a 9v amp like for practicing for solo.. can you give me some advice and tips for building a good amp. And i dont understand the preamp to power amp to speaker
VAustin89 (author)  lsakaguchii20 days ago

making an amp from scratch is a pain in the ass, in our country some parts cant be bought. a typical amp design will have a preamp connected to the power amp then the speakers.. the preamp section is where we typically see the equalizers, tone, gain and other stuff.. The volume for the amp itself is controlled in the poweramp section, when you buy an amp rated 100w that means the poweramp is rated 100w. if you are hell bent on making your own search any 10 watt power amp on the interwebs or you could go to you local electronic shop and buy diy kit for building power amps. most of this diy kits i have seen here in Cebu, are in the 10-30 watt category. if you could build that your next problem would be making a power supply to supply your power amp.

I too make stuff from salvaged parts alot - often you find the TDA2030 in old surround sound amplifiers and other such consumer stuff, so if you want an amp with a bit more power go here I designed a quite powerful guitar amp using the TDA2030 on stripboard - there are soundsamples too!

it is quite simple and as per most of my designs I try to use parts I've salvaged, in this case most of the parts probably came from the same PCB as the TDA2030 - people were so impressed I had a few local players pay me to make them one - maybe you could make a bit of money doing the same!

VAustin89 (author)  Insonicbloom3 years ago
I have both a tda2030 and a tda2003 design. I am heading in that direction selling amps, I have sold a couple of LM386 designs. Any op-amp design that can somehow "get a tube sound"?
shredjv3 years ago
I like your amp build a lot. Great way how you integrated the guitar effect circuits into the head. If I understand , you plug your guitar cable into the effect channel you want?..by the way did you dig up parts for your circuits from from old radios and other electronics?..I have a hard time looking for the correct semi conductors for the effect circuits. Nevertheless, amazing build on a budget!!
VAustin89 (author)  shredjv3 years ago
Yes, that is basically the concept. Pretty much, I used parts from old projects that I had in college, some broken computer speakers and anything that most people will find as trash.
freeza363 years ago
What design is on the pickguard of the white "Strat-style" guitar? It looks very interesting.
VAustin89 (author)  freeza363 years ago
just an ordinary pick guard and did a "mosaic-art" using front cover of PSone games that were still with me.
vov353 years ago
Your clear plastic enclosure is just begging for the installation of an LED light organ, IMO.

I like your approach of cutting the boards apart, well done!
VAustin89 (author)  vov353 years ago
yah, I am still match making what LED color to use.
mrsocky3 years ago
It could probably be perspex/ plexiglass. they're usually clear plastics used as windows and i think it can be used as bulletproof windows
vov35 mrsocky3 years ago
remember that material acoustics matter too! That said, I've seen some plexi/lexan amplifier boxes and even speaker enclosures, so it may be reasonable.