UPDATE 26/05.2008 - Sketchup diagrams and circuit diagram. I am going to buy a retro 1980's boombox (see my Big Bass Boomer Thread in General) and it has caused a whirlwind of inspiration for my to build a tribute media centre. Essentially, what I hope to end up with is a retro styled, over the shoulder, bass pumping, Fresh-Princing, music station. Idea 1 I could do what they did here: http://metku.net/index.html?path=mods/ghettoblaster/index_eng6 Except of course, mine wouldn't be so minimalist. Lots of controls and buttons and retro styling would be my priority naturally. However, I would need to power this off a 12V DC battery, and the amplifiers to power the speakers require: 12V DC. A pretty convenient match I know, but this leaves me completely handicapped as with regards to other things to add to it... I would just have a large, elaborate pair of speakers. If I were to run a CD player or a radio off this, it would detract from the power available for the speakers, and if I turned the speakers up slightly, I assume the other devices would cut out. The only choice would be a 35mm stereo jack to run an mp3 player off... I could make it such that either an MP3 player was charging or the speakers were pumping out tunes. The advantage is that this would make for the most powerful audio set up, with the least work. The disadvantage being that I wouldn't be able to run anything else off the battery. Costs: Audio amp: £25 Battery: £15 Speaker Drivers: £20-25 Chassis and bits and pieces: £20-25 Idea 2 Alternatively, I could use the same battery to power a pair of computer/ home-entertainment speakers: and one of these: Its a slim HDD media player, which holds a 2.5" drive, and plays the media from it. It runs off roughly 6V, I could happily use 5W speakers off the same battery pack, giving me a completely portable, 160GB media centre which I could share with my friends, which also plays DIVX video if you connect it to a TV, and stores my files if I want it to as well. The disadvantage is that it isn't as much of a 'big bass boomer' as the last one (still loud), which can't run as big drivers, and would be a more compact beast. The advantage is the functionality: I could have a bit of power on tap to run other devices, and even an MP3 player dock. The deep speaker box I make could be adapted for much deeper bass. Costs: Speakers: £15 Media Centre: £15-20 Battery: £15 Chassis and bits and pieces: £20-25 I would be very grateful if anyone could give me an opinion on which they think would make a better system; which would be a nicer one to own and live with?