Quoted from MightyGrave:Thats a cool idea - can you explain how it works ? And have you trouble if all games running at the same time?
Here's the device that converts the woofer outputs to a low level, isolated signal for a mixer. Plenty of other similar devices, but these are inexpensive and work fine. I installed insulated alligator clips to make it easy to hook up to the internal woofer (on non-AP pins). Output is RCA, which I simply run under the pin's woofer (protected so it doesn't get crushed) to the bottom of the cabinet.
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I originally had a 4 channel mixer, but moved to a 6 channel later on. The mixer's output then goes to the active subs. I just used a RCA 'Y' splitter to get the 2 outputs for the subs.
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You really don't need much for a sub to make a big difference, and a couple of 8" subs sound great. With 6 pins in that row, I did feel I needed two subs otherwise the bass seems distant. I originally tried my 12" sub from my AV setup, but it was a bit much.
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To clean up the cable mess, I installed a cheap, plastic 'cable run' right above the baseboard to hide the wires that end in Keystone RCA jacks, then short cables to go from the Keystone jacks to the mixer. I also have RCA plugs on the cable run so I can disconnect a pin if needed. Very clean install. Prior, all the wires on the floor behind the pins drove me nuts.
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People have asked me about having all six pins being played at once. Can't answer that since it's really just me and the spouse playing - so only one pin is being played at a time. But there should't be an issue tho, other than maybe adjusting the levels so you don't overdrive the sub's amp. In my case, I could have had a sub for 3 pins, but I prefer to have two subs going since it really fills up the room with nice bass. We've had company over where 2 or 3 were being played at once, really didn't notice any issues.