I posted this in the "alt bike" thread before seeing a section for electronics. I figured this would be better suited for a thread here, as y'all seem like a bunch of geeks who would get a kick out of this.
I was recently at our annual Harvest Moon Ride and there were a couple people out there with Soulcycle setups from Rockthebike. In case you don't know who they are, they custom make stereo setups that attach to xtra-cycles and use car audio gear, which they sell for several thousand dollars a pop. Got me thinking about building something similar, but as I'm broke right now this is what $8 in components from Radio Shack and Zingers (diy store), a trip to my works' deprovisioning bin, some spare Axiom pannier mounting hardware, a UPS battery and an evenings' worth of cutting, drilling and soldering work got me:
Here's the completed stereo with the battery and mp3 player:
Here's a rear view of the thing as it would sit on the bike:
A shot of the mounting hardware I use to attach it to my rack:
And here it is mounted to the bike:
I gutted and re-wired all the internals of the amp/subwoofer so that it runs on straight 12v DC, re-did the subwoofer power switch so it now acts as a cut-off for the battery (so I can just turn the whole unit off), attached the sattellite speakers to the sides of the subwoofer box, re-routed the speaker cables inside the box and then just soldered everything back together and it actually worked!
I'm calling it FRANKENSTEREO 1000!!! and I'm sure the next one (2000!!!) will be even nicer and more importantly, LOUDER! The music-making portion is a 44w output amp (22 for sub, 11 ea for the satellite speakers) and some computer speakers so it's not super loud but it only eats about 1.4amps under HEAVY load (aka. Reign in Blood on full blast) so on these 12V DC 12Ah UPS batteries I should be able to run it for 4 hours without even draining the battery half-way. Now I just have to come up with some good spooky music for this weeks rides (full moon cruise, critical mass, frankenbike pub crawl). As much as I love the metal, I know not everyone is a big fan of the genre...