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In Reply to: RE: Praise posted by Belgarchi on May 12, 2012 at 14:33:30
Seems like a nice choice of drivers. That makes me curious. What kind of crossover network did you use?
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I modified a crossover published on 'MurphyBlaster', ~12 db/octave.
The Hiquphon OW-1 3/4" tweeter can go exceptionally low, and the Seas CA15RLY exceptionally high. They are easy to match.
I would like to try one day a true (acoustic) first order crossover.
The same Seas midbass could be matched to a 1.1" low Fs tweeter from Scan Speak.
Yves
I have had some success with first order series crossovers using reasonably similar drivers -- Seas CA22RNX and 27TBFC/G. I have no experience with the Hiquiphon tweeter but from what I have read, it is sufficiently robust to handle a first order crossover with your woofer.
Send a note, if you wish, when and if you are interested in exploring first order.Depending upon the music you prefer and your listening habits, you may find it worthwhile.
Reference 3A speakers use no crossovers (most models?). Is that what you mean by "acoustic crossover"?
No, what I meant is a true 6db/octave slope, not an electrical 6 db/octave slope.
I would also like to try one day to create a loudspeaker with no crossover on the mid-bass. It will probably require a polypropylen cone.
By the way, I am more and more disppointed by metal cones. Even with steep crossovers slopes, plus a 'trap' to reduce the high-frequency resonance, they don't sound very good.
Could it be due to reflexions of acoustic waves coming from the tweeter?
Good luck. I spent more than two frustrating years pursuing the idea of a midbass without a crossover. I finally concluded that a shunt capacitor across a woofer can be a good thing, and that a shunt inductor across a tweeter may be preferable to a series capacitor: first order series. My version is minimalist, which I consider necessary to realize the potential benefits of this design.
I agree with your observation on metal cones and apply it to kevlar as well. I think you will find that poly cones in general have energy storage problems. To me, paper is still best in simple, low slope systems.
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