Capcom I/O low volume

OldFoo · Post by **OldFoo** » Mon Dec 03, 2007 10:49 pm

I've got my Capcom I/O working but the audio seems very, very quiet. I rewired the speakers in the cab with decent quality audio cable and gold plated phono connectors. I'm using the audio connections on the front of the I/O, not the Jamma harness. I have the I/O turned up to full volume and it's really not very loud at all.

Is there potentially a problem with the audio side of the Capcom I/O? Everything else is working fine with it.

Edit - Is it possible that there's not enough voltage going to the I/O? Could this affect the performance of the amp? Could a stronger 5v line maybe fix the problem?

OldFoo · Post by **OldFoo** » Tue Dec 04, 2007 12:04 am

I think your problem, if I'm understanding you correctly, is that the RCA jacks on the front of the I/O output line out audio, like QSound on CPS2 (straight through). Only the sound from the edge connector is amplified dude.

If you want to use the RCA jacks for your audio, you'll need to amplify the sound seperately from the I/ O -

OldFoo · Post by **OldFoo** » Tue Dec 04, 2007 12:22 am

Thanks very much for the answer. The volume control on the I/O does actually affect the volume: it goes from nothing to not very much over nothing!

I didn't realise that the audio jacks on the front only output line level. Why the hell did Capcom do that? I assume that there's no jumpers inside the I/O to change this?

If I do have to take the audio from the Jamma harness, is there anyway to get stereo; can I use the MVS pinout for stereo or am I stuck with Jamma spec mono?

OldFoo · Post by **OldFoo** » Tue Dec 04, 2007 12:51 am

You're pretty much stuck with mono on the jamma output. Putting a small amplifier for the stereo RCA is not a difficult task if planned properly. Practically any amp will do.

OldFoo · Post by **OldFoo** » Tue Dec 04, 2007 7:17 pm

What about this amp from Maplins? I'm looking for something with a small form factor. I should be able to run this off the ATX PSU that I have powering the Naomi.

OldFoo · Post by **OldFoo** » Tue Dec 04, 2007 11:54 pm

That would work, but you would have to solder a set of RCA connections in there somewhere.