Ghetto Blaster

Status: Loud, heavy, and freakin' ghetto!

Updates

July 28, 2009

I'll put up a schematic and some pictures soon. I think I may also add a high-pass filter for reduced power consumption.

June 3, 2009

Hey! So the original amp got broken at some point and was replaced with a cheap TDA7377. It's all put together now and kickin' some serious ass. At some point I broke one of the speakers and distortion now seems to come and go with it. I just glued the broken part and hopefully it will help a bit. Additionally, a gentle low pass filter seems to have helped. It is currently capable of getting almost 24Vp-p off the 12V source while still maintaining a fairly even frequency response. Pictures to come when I can find my camera.

April 27, 2009

I may be an idiot. I still can't figure out the supreme distortion problem with the amplifier. I'll do more when my next exam is over. This is getting out of hand. I don't know much about BTL amplifiers so I've just been figuring I'm screwing up somewhere. I just vaguely remember this working at some point and have therefore been simply trying to debug this configuration. Having an obscure part with a null datasheet is frustrating.

April 26, 2009

There is a frame and it can be jumped on. Speakers are mounted, but there's some debugging to be done in the electronics.

A solid ghetto blaster has been a dream of mine for a while. Most with any power are no longer sold and those that are have lost the design feature pertaining to shoulder mounting. Additionally, D-cell batteries cost a lot. My ghetto blaster is based on the TA8210 monolithic stereo amplifier with 20W/channel powered by a motorcycle battery driving a set of car speakers in a welded rebar frame. The basic premise for a ghetto blaster implies an assumption that all within 50m share your taste in music. This, in reality, is rarely the case and thus it must be indestructible.

I have a lot of dsPICs lying around and as soon as it's all together, I'll add a classy spectrum analyzer to it. It will also soon feature a duct taped walkman as soon as I can find one suitably priced. Plan B: Make a crappy tape player from scratch.

Parts List:

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