Special thanks to Yo-DUH_87, http://www.offbeathosting.com & http://www.hackaday.com/ for providing temporary hosting because of my bandwidth overages. So, the original plan was to replace the speakers in my sony studio headphones because one of the ears broke. Later I lost the backing to one of the ears, making it impossible to attach both speakers onto the headphone’s headband thing. I tried making my own headband, but it really wasn’t successful. So, months later I decided to resume the project and just put everything in a package that I could tote around in my backpack. This is the original boombox. I know that there are no speakers in there. I forgot to take a before picture, so this is the best I could do. It was a pretty good unit, but it was also no longer needed, so I thought I’d make use of it in one way or another. disassembly into 3 main units – the battery storage area (took 6 D type batteries totaling 9v.). The good thing about this unit is that I can also plug my backpack into a wall outlet if my battery ever runs out. Also there was the cd tray, which I will not be using because I’m going to be plugging external audio sources into the amp. some of the screws were really deep in there, so I had to make my own tool (a torx bit, extended) next, I poked the speaker’s grill’s out. One of them didn’t want to come out, and I kinda injured myself doing this. Since I know you guys love injury pictures, here it is. – anyways…. moving on, here is all the insides of what was in the boombox (besides the cd player and tape player). I could always add those on later if I had some need for them, but it would take a lot more space. some pictures I took when sizing up the headphones. In almost the same space I was able to fit 3 inch speaker where 1.25 inch ones had previously been. These also gave some tremendous bass for headphones at a really low power. back on track, I cut one of the grills with a giant scissor (tin snips?). Next, I turned the speaker over and hammered around the edges so that the grill was kind of mashed onto the speaker (but making sure that the cone cleared even when all the bass was on.) Both grills on, I cleaned them up a little bit later to be a little rounder remember this picture? Well, the amp in the middle, was hard wired to the main board thingy. I did the long task of manually checking which wires needed to be connected, and which ones didn’t. Out of the 2 groups of 4 wires, I found out that one of them needed to be shorted for the power to work (because the pow on was on the main pcb.) On the second wire I found out which one was the negative, left and right channel, but for some reason I couldn’t figure out the right way to get stereo off of the female plug thing that I desoldered from the main board. I decided to run the setup off of mono, because quality really didn’t matter – just that it was loud (I’m gong to fix it later anyways). Theres the amp with all the wires connected together I decided to run this off of an airsoft battery (9.6v – will this kill the amp?), and also is a picture of the female headphone jack. I didn’t solder it together yet because one of my friends has my solder. Next I plan on building boxes for my amp and speakers in my backpack.