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Followup To
Question -
I am installing a MTX TC4002 400 Watt RMS two channel car amplifier and connecting to a dual 4 ohm MTX Thunder 8000 12" sub-woofer (Model T81244A). The amp is set up to run 4 ohms or 2 ohms, the sub has two connection on it indicating 4 ohms. I believe we should get more poer if connected using the 2 ohm system. Can you please explain the best way to connect this system. Thanks Mark
Answer -
In reality you will get about the same power with either; the 2 ohm setting drains down the current and voltage of the amp more and the actual output power to the speakers will turn out to be around the same as if you set it for 4 and wire the voice coils up for the higher impedance. I like to run amps at higher impedances to get the greatest efficiency and cooling.
Let me know how it goes.
Cleggsan
So with the dual coil sub what is the wiring requirement to get the highest impedance? The amp outputs show two +/- connections with one for the left and one for the right at 2 ohms each. The bridged connection is from the negative on the left to the positive on the right. The sub speaker has two connections but I am still not clear on the best wiring diagram. Could you spell it out for a non-expert. Thanks Mark
AnswerAmp is in bride mode? Then speaker/sub is connected to the + and - terminals. The + wire goes to the + terminal on the subwoofer and the - to the - terminal on the speaker.
Speaker:
MTX measures all the dual voice coil speakers with the coils in parallel. Look here:
http://www.mtx.com/caraudio/products/manualsQuickInstall/subs/T81244A.pdf
And, so if you are putting it in a box of their designs, you should put the coils in parallel. The two + terminals get connected together and the two - terminals get connected.
This will give the impedance of 2 ohms to the amplifier; which is okey.
If you put the coils in series (- of number 1 to + of number 2) then the impedance will be 8 ohms. This will be good for the amplifier but you will not get so much power out. I think it may even sound better, but if you want gut shaking bass, better connect in parallel and hope the amp will take it like it says it will.
Hope this helps, but ask if you need clarification.
Cleggsan
