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In Reply to: RE: Passive high impedive filtering posted by pix on July 22, 2015 at 00:54:40
It took a while for this to click. There is an inmate called Tre' who has almost the exact same set up as yours, but he puts the cap at the input of the tweeter amp, and not after it. You should try it. It's more like an active crossover. I say second order it if you are able.Edit: The proper classification being; the cap before the amp is a low-level xover, and the cap after the amp is a high-level xover.
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Big speakers and little amps blew my mind!
Edits: 07/29/15Follow Ups:
Well, Now I have tryed miniDSP for low-level filtering in various x-over points and slopes, and none of those came close to the pressence I get with the high-level 1st order hi-pass filtering (bass falling of natuatelly)
I am not sure if itīs the miniDSP in itself killing the lifefullness of the music, or its higher order slopes. But the single cap filter is light years ahead in my ears.
The difference is most clear listening to high impact instruments (like piano) witch makes me think the key lay in less phase shifts.
I am fuly aware that lower high pass x-over point call for stepper filtering. But the best x-over point is also determand by the bass response, not the mid/tweeter horn alone. And I think the lowest possible hi-pass x-over point isīnt always the best, since this calls for higher order filtering, and thus more phase shifts.
Oh I can understand the attraction of a one cap crossover. Can't get any more minimal than that. When done right, yes I'm sure it sounds great. I don't use my miniDSP for daily listening.
I understand your points about low order crossovers. The one bit of friendly advice I'd give is that acoustic horns / compression drivers almost always need more than a first order slope. Not always, but almost always. Second order usually does the trick. I'm no fan of letting the rolloff of the horn/comp driver form the majority of the high-pass acoustic crossover. Direct radiators are different. YMMV.
Like I said before, you have years to play around with it, and I know you will. :)
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Big speakers and little amps blew my mind!
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