what gives???

[04silverz 10+ year member]

ive now had two different amps on teh same sub/box setup. the first was a nine.1 at 2 ohms, yeah i know underpowered, on two 12 d2 idmax's. this had significantly less thump and overall loudness as compared to one max running at 1 ohm. same with my orion 2500d. the box is about 4 cubes, ported and tuned to 32 hz.

what am i doing wrong. ive wired the subs different ways and always checked the final ohm load with a dmm before hooking up to the amp. why is one sub so much louder and more "present" than when i hook up both?

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[Immacomputer 10+ year member]

Check the phase of the speakers by putting a 9v battery to the + and - leads of the wires (attach them to the + and - leads on the battery). See if both speakers push out. If one goes out and the other in, then you have them wired out of phase and you need to reverse the polarity on one of them so that they both either move out or in with the same signal. It sounds like they're wired out of phase and if you have always had this problem, I feel very sorry for you.

If that isn't the issue, you must have some issues with the enclosure.

 

[Kold_Killa 10+ year member]

Do what immacomputer said, but just a disclaimer... do not hold the 9 volt battery on them for more than just a second or so...

 

[04silverz 10+ year member]

^^^each sub is ran separately to the amp.

 

[Immacomputer 10+ year member]

Irrelevant. Did you try the 9v battery test?

 

[04silverz 10+ year member]

yeah they are out of phase

i dont get how though

i double checked all the wiring before mounting the subs. ive even pulled them out and went from wiring them together and running together to one output on the amp to wiring them separately and using both outputs onthe amp.

if i check my wiring again and both subs are wired the same and all positives are ran to positives and same with the neg's what will fix this?

 

[04silverz 10+ year member]

checked my sub wiring again. they are both wired the same way so im not sure why theyre out of phase. anyway, one sub sucks in, the other pushes out. i took the pos an dneg ofthe one that sucks in and reversed them so match the other one that pushes out.

im assuming thats the way that you fix that as ive never had this problem before.

 

[Immacomputer 10+ year member]

That's how you do it. If they're on separate amps, it could be a phase switch on the amp (0-180*) or it could be a mislabeled voice coil (doubtful).

Double checking wiring is not a good way to check phase; either just flip one set and see if it gets louder or just use the 9v battery. You should notice a HUGE increase in output now with them wired correctly.

 

[04silverz 10+ year member]

If they're on separate amps, it could be a phase switch on the amp (0-180*) or it could be a mislabeled voice coil (doubtful).
Double checking wiring is not a good way to check phase; .

wired to same amp. why is double checking wiring not a good way to check phase. or more importantly, if my wiring is correct, why is the phase out? btw i did the battery and thats how i found that one was ******* and one was pushing. so i switched them to where they both push out. significant output difference.

i just dont get how wiring them correctly can still make tehm out of phase. are these two things not directly correlated?