posted
Lets say you have a sub that is 2 ohms. But when measured with a LinearX (LMS), The actual impedance is 4 ohms at 60hz, in the box. Would you use an amp that puts out its max. at 2 ohms (matched to the sub) or at 4 ohms, as measured with the L/X? Keep in mined this is for dbDrag, 1 note!!
Gary
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Posts: 318 | From: IL. US,of A | Registered: May 1999
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I would have to say, get the amplifier which will develop more power into your load. If your load IS 4 ohm at your note, then picking the amplifier that will supply the maximum amount of power (and thus current) at your note would give you the loudest sound, barring speaker limitations.
What does everybody else think?
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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posted
I remembre reading that Chris Lewis did that when he was building his SPL van (the pig). He originally had 2 DVCs wired for four ohms on a bridged Lanzar Opti2500. He measured it and it was over 10 ohms so he ran everything in parallel. That is what I would do, as long as you aren't going to play it at another note with less impedance. As long as the measurement is reliable I don't think you would have any problems. Most speakers have a large impedance rise near their resonance, and if I recall correctly when used in a ported box the impedance rise is even greater at the tuning frequency.
posted
You guys are right on the money. A competitor can definitely make big gains if they understand the impedance signature of their systems better. No use getting that big stinky 1 ohm Class D if your woofers are sitting at 4+ ohms at your note....
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And that's the bottom line, cuz: LORD DUKK SAYS SO!
The Big Show The Dukk says: Know your bass: PORT your damn box!! Have HoleSaw, Will Travel!
posted
Thanks a bunch. Now I can go out and buy the right amps. Humm! Makes you wonder how many systems out there aren't configured right because of the impedance rise at any given note, for dbDrag competitions. Thanks again. Gary
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Posts: 318 | From: IL. US,of A | Registered: May 1999
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