sub Q

ok, well i have a RF 400S amp..200x2 and it's bridged to two 12" MA audio D6 subs in a sealed box, i wired them in series parallel, so that my amp doesnt get the 2ohm or 1.6 ohm it is gonna get, cause the amp cant take it in bridge mode, all the gain levels are set the EXACT same how i know this because they're maxed out...but when the subs are being played the right sub is pushing out a lil more than the left one..can't seem to figure out why its doing this..PLEASE HELP!!!

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xTimx

Well, the MA Audio 120D6's are 6ohm DVC rated 400RMS 800Peak. If you have them wired in Series/Parallel then you running at 6ohms, but how are you wired to the amp? I think you have it bridged at 6ohms, which means you're getting less than 200watts per sub. Poor amp choice IMO. With those subs you want an amp that is 1ohm stable (since wiring them in parallel will produce a 1.5 ohm load) and rated at least 800 x 1 @ 1ohm. The JBL BP1200.1 would do you nicely, and you wouldn't have to have the gains cranked either.

Why are your gains maxed out? That isn't a power booster. The gains adjustment is ment to adjust the amplifier's input to match the headunit's pre-out voltage for a cleaner signal.

As far as 1 side pushing harder then the other, could be the subs themselves, or the amp may not be "internally" identical for both channels. Switch your subs (but keep the wiring the same way) and see if the other sub pushes out farther then. If it does, then it's probably something with the amp. If it doesn't, and the original one still pushes farther, then the problem is probably one of the subs.

Do you have the subs in a custom or store bought enclosure? Are both chambers identical in size, or is it 1 big chamber?

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Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
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ok well this is how i got them wired up to the amp https://www.maaudio.com/sub/techsupport/boxparameters/WiringSubwoofers.html#combo (it's the second one) as for the amp it's ment for 2ohm minimum at 2 channels and 4ohm minimum at 1(bridged) i can't go any lower than what that is, cause i'll damage the amp..i can't afford another amp cause i'm low on budget, especially JBL cause they don't seel that brand where i'm from, and i only have like only 100$ in the account...:( as for the box i built it myself...and siliconed the inside and out of the box and it is one big chamber 2.5cu3, please help again...thanx

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xTimx

You're wired like I thought then, at a 6ohm bridge. You could also wire each sub to it's own channel in parallel using the 1st diagram for a 3ohm load on each channel, and you may get a little more power then your current 6ohm load.

Try that and see if you still get one sub that pushes farther then the other.



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Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com

Also you want the subs to be in there own cambers. put a divider in the center.

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ok r u certain i will get more power this way!? cause i am going to check how much DB's my stereo is tomorrow (well today anyways) and plus i don't want my amp to frying on me...:P

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xTimx

oh ya one more thing...my amp does the following...
4ohm per channel - 100 x 2
2ohm per channel - 200 x 2
4ohm per channel - 400 x 1

wouldn't that wiring job produce less than 200watts per channel if it's 3ohm....since a 2ohm load will do 200watts per channel

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xTimx

The 4ohm bridge is still doing 200 watts per sub (since its 400 watts at 1 channel being divided by 2 subs). You should get about the same wattage with each sub on it's own channel as you would with a bridge.

The main reason I mentioned it was to test the subs while they weren't connected to each other (individual channels instead of the combined bridge). It's easier to switch them back and forth to see if it's an amp problem or a sub problem that way.

FYI, RF rates on a 14.4v electrical system, so you wouldn't be getting exactly 200 watts at 2ohms anyway.

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Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com