I have 4 mtx 9500 12in subs 2 of them is on a mtx 92001 and the other is on a mtx 4001d . would it be better to run all four on the mtx 4001d. for more power and a better sound or how should i run this set up

You seem to have everything in spec. check your crossover points and your speaker wiring. subs may be playing out of phase.
A huge factor is subwoofer enclosure ...if the enclosure is not in spec with sub requirements the subs will not peform great.

Hi Mason.
Are the positions colour coded in any way?
Red = Positive
Black = Negative
I've looked at some photo's from the website and at a guess I would say that yours are the push on crimp types, so no colour markings.
Have a look at the pdf wiring diagram they supply here as it may shed some light on things:
MTX Thunder US-XT12-44
I've looked over loads of forums but none seem to mention the wiring of these subs.
Understandably you want to get this right as they are a very nice set of subs when they're up and running.
If all else fails try looking at the MTX contact list and ringing one of their supported dealers for more info.
Regards
Mike

The more amp you are pushing the better. Better too much amp then not enough. How many watts per speaker? less then the amp I hope. When you need decibles the more air you push the louder it will be. Enclose in a MDFB enclosure or plexiglass and feed towards each other and port the box to the sides. This will cause some annoyance. We ran 2 rockforts @1000 watts and abtained 137dc before the back windshield blow out,,lol

THE AMPLIFIER NEEDS A 1 OHM LOAD AND YOU HAVE THE RIGHT SPEAKER TO PROVIDE THIS LOAD. THE AMPLIFIERS TERMINAL STRIP PROVIDES YOU WITH 2 POSITIVES AND 2 NEGATIVES, BUT THEY ARE ONLY FOR CONVENIENCE WHEN WIRING 2 DRIVERS. ACTUALLY THE 2 POSITIVES ARE THE SAME CONNECTION INTERNALLY ON THE BOARD, AS WELL AS THE 2 NEGATIVES. THAT BEING SAID, THE SIMPLEST WAY TO CONNECT YOUR SPEAKER IS TO PARALLEL THE VOICECOILS IN THE BOX BY CONNECTING THE 2 POS. TOGETHER AND THE 2 NEG. TOGETHER THEN RUN THAT POS. AND NEG. OUT OF THE BOX AND SIMPLY CHOOSE EITHER OF THE 2 POS AND NEG. OF YOUR CHOICE AT THE AMP. IF YOU EVER HAVE TO ADD A SUB, THEN YOU WILL HAVE 2 MORE TERMINAL LEFT OVER ON THE AMP. TO CONNECT IT TO AT THAT TIME. BY ALL MEANS, IF YOU WOULD LIKE TO RUN EACH COIL SEPARATELY OUT OF THE BOX AND CONNECT THEM TO ALL 4 TERMINALS, THEN THIS IS FINE TOO, AS EITHER WAY, THERE WILL BE NO DIFFERENCE WHATSOEVER. LET ME KNOW IF I CAN BE OF FURTHER ASSISTANCE....V

They probally would, but i just found that sub for 51.00 im sure it would cost that and more to have.it fixed

Im kind of confused with what exactly your asking. Are you trying to run 3 subs off of an amp? If so, the RCA's should go to the front of the amp, and if your plugging 3 subs in to it, you need to have a 3+ channel amp. There is a way to hook it up differently though. I have 4 12" Hifonics subs running off a 2400 watt Nitro-BMW-486 amp. I just have two subs running to each of the two channels.

Did some research and it sounds like a wicked lil amp with clean clean sound-its hard to say what subs to tell you to run because everyone has different taste- and without knowing what your setup is going to be theres no real way to actually say-the amp is made to run 3 channels -so focusing on the sub channel only i personally say get a pair of 10s or a good 12-your not throwing a ton of power so you dont have to go balls out on the subs- i personally like MTX subs and xtant is made by MTX so that wouldnt be far from home -good luck with that

Hello aj_vidal22,

Here's the link to MTX's sub page where you can view or download the information you need to properly wire the subs to your amp.

http://www.mtx.com/caraudio/products/manualsQuickInstall/subs.cfm

For maximum power, you'll need to wire the subs so that they present a 2 ohm load to the sub outputs on your amp. That will give you the full 420 watts RMS the amp is rated for. Likewise, you,ll want the run the front 4-channels at 2 ohms. Run separately, they produce 85 Watts times 4 channels, or if bridged, 130 watts times 2-channels. But if you run fronts at 4 ohms, they only produce 70 watts times 4 channels and your sub output at 4 ohms drops to 210 watts.

Hope this helps.

HI DUDE .. U CAN ONLY SINGLE PC OF JL SUB BY BRIDGE MODE ... COZ UR MTX AMP HAVE 300WATTS RMS ....

I had same problem with a TC6001 and get solution from MTX, not send to MTX instead MTX kindly sent a quotation for parts to be replaced, I can tell you what parts need to be replaced if you still need a solution.