Picture of Little Gem Guitar Amp
Here's my take on the famous Little Gem mini guitar amp.
All details on the electronics can be found at
The case came from Jameco p/n 11886.
The speaker bezel is the rim of a tin can that was epoxied to the case.
The disk in the rear serves as a cord reel.
irishjim685 months ago

I absolutely LOVE the look of this. Those 386 based amps really ROCK as well.

garagemonkeysan (author) 1 year ago
Thanks! : )
jrace21 year ago
Hi, this looks great, makes me want to get back into this sort of thing when I get my soldering iron situation sorted! :)

evolution mastering
NunoMorna2 years ago
Hi. I've been studying the schematics and the pictures you posted and since I'm a beginner I'm frustrated because I don't understand a few things.

For instance, where do I put the speakers, dc-in, dc-out, the on-off switch, the 5K vol pot? That's not represented in the schematics, is it?

I apreciate the help you can give.
garagemonkeysan (author)  NunoMorna2 years ago
Hi NunoMorna -
Sorry, the dc-in and dc-out are special to this build and not necessary.
Your other questions can be found at this great Instructable.
Good luck! : )
myakka4 years ago
someone gave me a mini guitar amp that you can buy online for $20. they said it was broken but i took it apart and found that it was just a disconnected wire that runs to the male input/output jack. it runs on a 9 volt and it doesn't require a cable to connect to a guitar. so i stripped it down and went to LOWS and bought a slab of pine wood for $3. i cut the wood into 4"x3" pieces and made a box, added all the components and designed it to look like a Marshall half stack. so now i have a mini Marshall half stack for $3! thanks for the inspiration - myakka
garagemonkeysan (author)  myakka4 years ago
Great! You should post the build! : )
curator4 years ago
can u post the schematic for the circuit i like your instructables!
garagemonkeysan (author)  curator4 years ago
There's a schematic on the link to the Runoffgroove site. Thanks for the comment!
jm564 years ago
What speaker are you using?
garagemonkeysan (author)  jm564 years ago
Sorry, the speaker I had in my junk box and I forgot where I got it. There's no name or number on it either. Any 4 or 8 ohm speaker should work.
jeffrey_om5 years ago
this is very cool   how much is the price to make this?

sorry for my bad enlish
garagemonkeysan (author)  jeffrey_om5 years ago
 Thanks! Sorry but I didn't keep track of the cost of this build. Most parts were spares or left overs. The most expensive part was the box itself. About $9.00 US at Jameco. : )
jameco iz da best!
sweet, how's the sound?
garagemonkeysan (author)  corey_caffeine5 years ago
Thanks. It sounds similar to the famous Smokey Amp.
nomuse5 years ago
Oh, my, that's purdy. I like the cord reel, too -- great idea.
garagemonkeysan (author)  nomuse5 years ago
Thank you! : )
Hooorah a fellow hhgttg fan
 Thhhaaaaaannnnks! : )
junits155 years ago
you sir, should should be employed n making computer cases.  I like the case more than whats inside.

very nice job!
garagemonkeysan (author)  junits155 years ago
Thank you! Stay tuned, I'm working on a case for some powered speakers. : )
I will!
That thing is gorgeous, very nicely done.  How does it sound?
 Thank you. Sound is okay for a practice amp. : )
 does this work on a bass
garagemonkeysan (author)  emedina945 years ago
 If you go to the runoffgroove site there's a note on the drawing about playing with the value of the 220uF cap. However, I am not sure if that will turn it into a bass amp. As I mentioned below I've got almost zero experience with amps. : )
I tried mine without modification with a bass, and it sounds like the beginning note of Tom Sawyer. Also managed to cram the thing into the original speaker box.
Very nice!
garagemonkeysan (author)  JamesRPatrick5 years ago
Thank you! : )
220VAC5 years ago
VERY cool looking!  Q - what's with the two small square holes toward the back and bottom of the box?
garagemonkeysan (author)  220VAC5 years ago
Thank you! Very observant! The holes are for a transformer in/out cords. The enclosure also houses the transformer. I didn't get in the photo though.
lowercase5 years ago
 very nice, really well done.
garagemonkeysan (author)  lowercase5 years ago
 Thank you! : )