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In Reply to: RE: That schematic doesn't make any sense to me, Davey ... posted by neolith on July 10, 2015 at 17:17:46
Awesome! If I'm bi-amping I' think I'd need:
LPF freq and slope
HPF freq and slope
And the freq/slope between the tweeter/mid to wire in passively.
Looking at your schematic the HPF looks very flat - perhaps that's what Wendall meant when he said it can't be bi-amped.
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Let us know how it goes. My guess is that the conductive tape is lighter, which should have some speed benefits, but has higher resistance and therefore lower current flow to the woofer. This could explain them having less bass (if that's true). If that were true, then I would expect bi-amping to bring less benefit than it does to older models.
I do not think the flat wire is lighter than the round one. In case of the 3.7, the flat wire has a larger cross section than the round wire of the 3.6 but there are other changes...
Ok, then my hypothesis would be wrong.
on prior models?
Yes, it is true that in most cases the flat and round wires have the same mass/cross section. This is not true for the mid of the 3.7 but for the rest I think it is. Fitting thinner wires will resultat in a drop of SPL.
I have been working on a model for biamping. The model will have the mid-tweeter and supertweeter still in a series configuration but paralleled to the woofer. If you can get me those impedances, I believe I can get a pretty good simulation which can then be converted to a AXLLO.
Impedance of the drivers? I'm sure I'll need more than my multimeter. Can you point me in right direction?Edit - unless you're looking for straight resistive values - that's easy enough.
Also I get 116.8 for the cap bank, but I also have 1.7i.
Edits: 07/10/15
Yes, the drivers have almost no reactance so the simple resistance is all that's needed. You may have to disconnect the connections at the drivers to get the correct values.
FWIW, the 1 mfd difference (115.8 v 116.8) is immaterial as the caps have a 5-10% tolerance and it is likely that the two sides (left and right) differ by more than 1 mfd anyway.
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