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Old 9th December 2007, 10:20 AM   #11
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...So your saying its alright? no issues?
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Old 9th December 2007, 10:30 AM   #12
AndrewT is offline AndrewT  Scotland
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Just take care to ensure the drive signals can never be accidentally reversed. A pair of Speakons would be ideal.
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Old 9th December 2007, 10:35 AM   #13
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do you mean, putting one amp out of phase with the other? like turning the phase swivel to 180 while the other is 0, because thats all I got out of that sorry
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Old 9th December 2007, 10:38 AM   #14
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Yes that is correct. You must make sure that the 2 signals added together actually amount to something proportional to the input power. Otherwise (such as with the example of having one VC wired out of phase) you have little or no movement of the cone and alot of heat that has nowhere to go.
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Old 9th December 2007, 11:41 AM   #15
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ah thats good to hear but what do you mean by "You must make sure that the 2 signals added together actually amount to something proportional to the input power"

now that were getting some where, what would happen if say one amp was set to say -30 and the other was set to -40, I cant see how that is bad?
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Old 9th December 2007, 12:31 PM   #16
Dan2 is offline Dan2  South Africa
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I have never worked with DVC subs before, so i might be wrong here, but this is how i see it:

If you hook up a stereo amp, left channel to 1 voice coil and right channel to the other voice coil, and set the balance to full left, its not like your amp's gonna blow up - right?? 'cos im sure thats 1 of the configurations you use with a DVC sub.

So i doubt having different gains on your amps will damage anything - my only question is why would u have different gains if your amps will be the same??
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Old 9th December 2007, 01:10 PM   #17
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Oh that was just a question to ask, Im just making sure all is safe because I know I wont be able to set them exactly the same, but within a db will fine
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Old 9th December 2007, 02:38 PM   #18
judtoff is offline judtoff  Canada
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IMO you'll be fine. Even if you reverse one. Its not like the coil can be destroyed from it.

Most subs are about 1% efficient. 99% of the energy becomes heat.

If you wire it backwards they become 0% efficient, and 100% of the energy becomes heat.

The coils magnetic fields cancel and there will be no force on the VC at all.

Thermally it'll heat up a little quicker since its not moving.

The amp will be fine if its any good. It's done quite often in car audio(I'm a little more into that than home audio but still). And no I'm not talking about stapping amps.

You'll be fine with 1 amp per coil.

You could even do 2 per coil, but you'd need stappable amps .

And I really doubt the amps will see each other through the inductance of the coil. Maybe a little, but its a VC not a transformer
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Old 9th December 2007, 03:16 PM   #19
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To make it simple. Your biggest concern is to hook them up in phase. Just as you would any two speakers.

Hooking them up out of phase will result in very low output. You will absolutely be disappointed in the output if out of phase.
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Old 9th December 2007, 03:44 PM   #20
tinitus is offline tinitus  Europe
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It was discussed some time ago in another thread, which was about shorting one coil with a resistor and the issue with using 2 amps on each coil of dvc driver was discussed too, I believe DanWiggins himself was there too
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