So now that I've decided to spend a bit more time and money on this cabinet than originally planned on this little cabinet, I found that the idea of hacking up a pair of cheap computer speakers was kind of bothering me. They didn't sound very good, at all. They were OK for the classic games but I put a movie on XBMC and they sounded like absolute crap, almost unlistenable.
Did a quick bit of shopping and found this set on sale for $40. Edifier Aurora MP300 plus. The speakers are a bit larger than a golf ball and the Subwoofer tube is 10" long. So I guess I've got a bit in common with Aurora speaker designers (ha ha)
It kind of sucks now because I'm on days off and have some time to work on completing the cab but I have to wait to see how I'm going to integrate these things. The volume control and sleep buttons (push both volume buttons) are on the top of one speaker, so I hope I dont' have to wake them on power up or thats going to make things tricky. Anyways cabinet is pretty much on hold till I figure that out.
From this:


To This:

So update on this:
The speakers were kind of an impulse purchase. I've been stuck on the idea of a set of speakers with a volume knob that I could disassemble and use on the exterior of the cab.
After reading on the Edifiers (after buying, of course) I found that the volume was controlled by two tiny buttons on top of one speaker:

And even worse yet, they had to be woken up after every power out by pushing both VOL+ and VOL- at the same time. I didn't like the idea of having to open the cab every time I powered up and then again if I wanted to adjust the volume so I decided on going with the original design and re-selling the Edifiers.
That was until I powered them up at home here. If you gave normal desktop speakers a 10/100 and $100 logitech set a 100/100, these would probably score around 85. They sound amazing for the size. Not a whole pile of bass or volume but a really nice full clear sound, perfect for a tiny arcade machine.
I decided to risk wrecking them to open up the speaker with the switches to see if they could be rewired:

Jumpered Red to Grey: Volume +
Jumpered Red to Green: Volume -
I can use arcade buttons to adjust the volume. Pretty excited about that! Going above the screen.
