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Starting the cabinet all at once. It works! And here's how...
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krick:
Peale,

If you're setting up your cabinet so you can swap in a JAMMA board easily, how are you handling the speaker issues?

I was thinking of something like this...



If you want, you can wire it using stereo plugs and jacks like this...



On the jack connecting to the JAMMA connector, just don't wire the "ring" connection to anything.

I'm pretty sure you can also wire the JAMMA mono signal to both left and right speakers (connect the signal to both tip and ring).  The only caveat is that some JAMMA board amplifiers might not be able to drive two speakers wired in parallel this way.

If you have other boards that have custom stereo output that bypasses the JAMMA connector, you just have to make an adapter cable with a 1/8 inch stereo jack.


Oh, and another speaker related thought.  If you want to avoid having to wire up a power source for the speaker amplifier, you can get a set of USB powered speakers like I'm using.  They tap 5V off of a PC USB port and automatically turn on and off with the computer.  No power brick needed.

http://www.arcadecontrols.org/yabbse/index.php?board=1;action=display;threadid=16381

Just look on ebay for "usb powered speakers".  I bought 10 pairs of Benwin SP691 speakers for $28.97 (shipping included).  I used one pair in my cabinet and sold 6 pairs on eBay.  I have 3 pairs left for future projects.

...
Krick
SirPeale:
Since the cab uses the original speakers, I didn't have to do anything; I just wired the speaker out jack to the speaker input on the J-PAC.
krick:

--- Quote from: Peale on June 15, 2004, 03:43:52 pm ---Since the cab uses the original speakers, I didn't have to do anything; I just wired the speaker out jack to the speaker input on the J-PAC.

--- End quote ---

I'm using the original cabinet speakers too.

There are two problems to handle....

1) sound coming from computer is stereo and un-amplified
2) JAMMA (J-PAC) expects mono and amplified

SirPeale:
Ah, now I see.  My soundcard has a built-in amp, so I didn't have to do anything.

What you could do is use the amp from a pair of powered speakers, and wire it in that way.  
krick:

--- Quote from: Peale on June 15, 2004, 03:52:02 pm ---Ah, now I see.  My soundcard has a built-in amp, so I didn't have to do anything.

What you could do is use the amp from a pair of powered speakers, and wire it in that way.  

--- End quote ---

That's what I'm doing.  My amp is USB powered as well so I don't have a power brick to worry about.

However I'm still curious about how you deal with the mono vs stereo issue.
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