Amazon sells a Dual car Stereo XHD 6425 for just under $100. No other car stereo can match the spec to price ratio. I put this in a big tool box. There is no Jobsite (Milwaukee) Radio or Boombox (Sony) that can match these spec. You can build one even better, than this one, by buying more expensive components
The toolbox is a Contico about $40 from Walmart online. This toolbox is heavy duty, you can step and sit on it. Toolboxes for around $20 will do, but it limits the size of speakers. The side speaker in this picture is a 8' woofer ($15) with a 6' grill over it. Facing rearward is a pair of 6' car stereo speakers from Walmart for $35
Step 1: Specification and Features
There is no Unit for sale that could match these specs:
Dual car Stereo XHD 6425 $100
AM/FM Stereo w/ HD radio
USB and MP3/WMA CD player
Loudness control (More bass)
4 speaker output @ 50 watts per channel
Remote Control Preset buttons Clock
It displays MP3 Song names and Station Call letters & Titles
Has ID Tag support for CD and USB Flash drives
Aux Plug in for Ipod, etc.
HD reception was poor with a standard rod antenna. An antenna wire that was made longer, had exceptional reception
Step 2: Here Is the Guts Inside
Here is the car Stereo hooked up to 2 6" car speakers and 2 8" woofers. My wife say this unit is much too loud. The only limits to this project is your pocketbook.
A tool tray fits over the top to carry other items.
Step 3: Power Supply
I am using a 12v power brick from a dead computer monitor. This is the back side showing a pair of 6" speakers
Step 4: Batteries
This 10 cell pack will play the unit for just a couple of hours,
I sometimes use this 12v fan to keep it cool when I play it loud and long.
Step 5: Here Is Its Baby Brother-Smaller Box = Smaller Speakers
It sounds pretty good too. It has 4" speakers in the front and 4" X 6" speakers on the rear.
With a cheap stereo and speakers it can be done for just over $100. Get the most expensive in everything, the price can be over a $1000.