I moved my in-house system to the garage a few years back. 2001-2002 era Sony amplifier/receiver 100w with outputs for 4 channels. Had it driving 2 kenwood bookshelf 2 way speakers with 6.5” woofers, ported. Added a 12” sub on channel 3 for some extra crunch. So a 2.1 system. I mostly used an iPod with it, but also had a technics turntable (yeah, vinyl in the garage can be done if you’re careful with how you handle a record). Finally decided to move that system back inside where it belonged.
Looked for something inexpensive to replace it in the garage. Used a kicker car amp for a little while, but finally ended up experimenting with the “200w” 12v mini amps that can be had on eBay for $14 and up. Got a Lvpin LP-838. 2 channels with a “super bass” sub output that hooks up with a tiny molex plug. I figured it’d be garbage but reviews were decent on some audio forums. Ordered one for $19 with properly rated 12v wall wart, repurposed some pioneer 6.5” 3-ways and reused the wal—mart 12” sub I had added to the system before moving it back inside. So I still have a 2.1 system in the garage. Controls were a little fiddly as the pots are sensitive on the little amp, but sound quality was very good considering I put this system together with leftovers. Total cost probably $45. The Sony receiver I had been using cost $200+ when I bought it. We will see how long the little Chinese amp lasts, but I recommend it for shop systems. I’ve abused it so far, have yet to be disappointed with sound quality or volume capability. It doesn’t get hot as I’d expected and the new system takes up 1/4 the space of my “hi-fi” system I had out there before. Plus, home units aren’t built to operate in climate extremes. With this el cheapo amp, if I kill it next summer due to heat, I can replace it cheap.
Like most things, I enjoy seeing what I can reuse or get on the cheap and try to get some good results. You’re gonna be making a lot of noise in the shop, so crystal clarity and perfect imaging shouldn’t be your first thoughts. The lp-838 is as good as some higher priced shelf amps friends have costing $100 range, just have to spend a little time getting it dialed in just right. Find some efficient 2 ways and a sub to go with it and you’ll be pleasantly surprised.
I listen to mostly classic rock and metal, but I tried some very bass heavy stuff just to see how it would respond to rap and whatnot. Slight clipping happened, just had to turn the sub output down a little.