I was thinking about hooking up 2 XA1000 Amps @ 4 ohms. I would hook up each mono block to a diffrent voice coil on my 12" eclipse sub. Good idea or bad idea?
In general, you should only try to dual amp a speaker if the following are true: 1) The RMS output of each amplifier does not exceed the single voice coil power rating; 2) The amps are exactly the same type and the gain is exactly matched; 3) The amplifiers receive the exact same input signal. If these things are true, go for it. It is far easier, however, to use a larger single amplifier.
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Support the12volt.comThe amps are going to be exactly the same and their 325 rms a piece and the sub can handel 750 so i ought to be good, I know its stupid but the reason why im doing 2 amps for the sub is so their all eclipse matching amps =/
make sure your gains are matched.... i belive if they're not perfect, each voice coil could move differently and your sub will be a big paper weight
In the interest of dispelling myths: the reason you need the amplifier gains set exactly the same and the input signals to be exactly the same is to avoid magnetic field cancellations in the voice coil assembly that can reduce your output. The woofer will not be physically damaged by opposing forces generated by different signals (unless the power input exceeds the ability of the voice coils to dissipate the heat.) The opposing forces will simply cause loss of voice coil motion. Two equal signals 180 degrees apart will simply cause the voice coil to stop moving. If you are at or near the power limit of the coils, this loss of motion can cause them to burn up much faster than normally since it is the motion that cools them (as well as what generates the sound waves.)
So, bottom line is the woofer will not be "torn apart" or any other catastrophic disaster like I've read before here and elsewhere, but it can cause poor performance and faster death by heat.
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Support the12volt.comthanks for clarifying that... maybe that catastrophic disaster occurs when each voice coil gets sent different amounts of poewr.... i'm not sure though.
but either way, its probably not a great idea
darthness wrote:
thanks for clarifying that... maybe that catastrophic disaster occurs when each voice coil gets sent different amounts of poewr.... i'm not sure though.
but either way, its probably not a great idea
Actually the only "catastrophic disaster" that can occur is if the coils burn up. That's all that can happen. Different amounts of power mean nothing. It's different phase that causes loss of output and excess heat.
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