Hey guys, just installed a new set of mtx 4000 10" subs, which run at 200W RMS in my tC, in a sealed 3 pack enclosure. I'm currrently runnng a stock HU with a line leveler spliced into the two rear speakers with a fusion amp rated at 250 RMS when bridged at 4 ohms, my current set-up. The subs were originally wired so that the two outer subs ran on the same power line, one negative leading to the other positive. The central sub was wired independantly, and I'm assuming this would mean that the amp was putting out it's power at 2 ohms, unless I've completely forgotten my physics course from last year. Anyways, I rewired the subs last night so each one was individually powered to the pos and neg terminals, but on the short drive to class this morning I could not get the subs to exceed a certain power level before the amp cut out. My question is, is the amp putting out too much power, are the subs drawing too much power from my battery, or is the amp now not pushing enough power? Any insight is appreciated, and yes I already searched and couldn't find anything similar to my situation

 

probably exceeding the ohm range that the amp can handle. Look for some wiring diagrams on the net.

 

+1 on that, what Ohm level is the amp rated for?

 

it's rated for both 2 and 4 ohms, 90W x2 at 4 and 130Wx2 at 2, with 250W bridged at 4 ohms.

 

now you need to find out what ohms your subs are at (2/4 ohm single or 2/4 ohms dual voice coil.)

 

I'm about 90% sure they're single voice coils, unless i can just look at them and tell the difference. at the least they're 4 ohms, at the most 12 depending on the model. gonna go pull one out and see if i can find a model number.

 

they either gonna have one hookup connection or two.
thats how you can tell the difference or the model# may have a ''D'' in it meaning dual

 

haha yeah figured that out after helping a buddy of mine resolder the wires on one of his JL subs today. anyway, the subs are at 4 ohms resistance, putting out 200W RMS. So i can only assume that when i had all 3 subs wired independently, i was attempting to pull too much power from my little amp hah. anyone care to tell me what it all means?

 

you need a bigger amp?

 

not really what i meant. more specifically, as in what causes the amp to cut out when the 3 subs are all wired separately when it doesn't if the two outside subs are wired together. I'm aware i'll probably be needing a more powerful amp, but my current lack of a job means i have very little loose spending cash, and it took most of the money from my christmas gifts in order to get these subs. Anything i can do without dropping 200 dollars on a more powerful amp is preferable.

 

go here.
http://www.the12volt.com/caraudio/wo...igurations.asp

 

You were putting the amp in <2 ohms. It is not stable nor rated to handle that. Your amp goes into protect mode at this point and shuts off before it self destructs. x2 on www.the12volt.com

Add a third amp and make life easy so you can tune it to tighter frequencies at 4 ohms to get that hard punch you miss out on with two subs at 2 ohms tuned for deep carrying bass.

Good luck!

 

thanks guys, one more question, probly an idiotic one. If I'm going to purchase a Mono amp rated for 1 ohm resistance, does the RMS need to be at 600W if they're all going to be wired in parallel? you know, 200 x 3?

 

It will only push that much power (max rating) if you crank the gain all the way up. Find someone (maybe yourself) with a tuned ear that can listen for distortion while you tune whatever setup you end up with. It's very important to know the limits of your system and its components. If you aren't satisfied, don't turn it past it's limit, just buy nicer stuff! Three 10's should be a nice sound though.