I know this is an old thread, but
I just bought a lot of 3 sound boards off eBay
One is a 11581(space station)
The second is a rev A (arch rivals based on model number, but also works in system 11 (B?)
The third is a revision C( model is 4002, couldn't find which arcade game Smash TV or high impact? Also used in system 11 (C?)