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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Which inductors?? posted by sootshe on May 4, 2012 at 22:17:15:
The 'best'?
Lower DCR is not always the answer, you must think of output balance.
Attached, find a link to a calculator. You can enter your parameters and get an output which'll make sense.
I urge you to 'juggle' the numbers to achieve the same number of layers as turns per layer....this will make a coil square in cross section. This is a theoretical 'best'.
I would also suggest, if you decide to 'roll your own' to consider using PVC as a core. Look up standard dimensions and choose one based on getting a 'square' coil out of it.
for my panels, which come with a 0.40 ohm DCR aircore, many people add to the bass output by going to very low dcr inductors. The panel already has such a bass peak for good reason.
You also may find that going to 10ga is sheer wacky. the coil is difficult to wind and if bought aftermarket, $$$$. Not to mention they can get pretty LARGE.
with just 30 seconds on such a calculator, i came up with the following::
Inner diameter 2"....height of coil of 1.05" and 163 turns of 12ga and nearly 13 layers of 13 turns each.....DCR? about 0.2 ohms which is pretty low.
You'll probably find the commercially made coils to come from a series of 'stock' size spidles and therefore NOT optimized.
ALSO such minute changes in DCR will produce only fractional DB changes in output.
Take the DCR of the driver, add it to the coil DCR and take a percentage. Say....a 4ohm coil and a 0.4 ohm inductor: Thats 1/11th the power being dissipated in the inductor. Not much, I'd say.
Too much is never enough
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Follow Ups
- RE: Which inductors?? - pictureguy 00:29:34 05/05/12 (2)
- RE: Which inductors?? - sootshe 00:50:00 05/05/12 (1)
- RE: Which inductors?? - pictureguy 12:52:30 05/05/12 (0)
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