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Multi-Way Conventional loudspeakers with crossovers

Dunlavy SC IV schematics ?
Dunlavy SC IV schematics ?
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Old 23rd May 2020, 04:41 AM   #71
LineSource is offline LineSource  United States
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Originally Posted by darkmatter View Post
I have been tempted with a very large build for some time, have been influenced by the Duntech Sovereign and latterly Dunlavy SC VI
GESTALT: The whole speaker is greater than the sum of the parts... An entire speaker using Dunlavey philosopy and engineering sounded musical ... Back-in-the-Day!

PBN Audio in the USA evolved the Dunlavey Audio ideas, and gradually moved forward with Linkwitz-Riley crossovers, reduced edge diffraction cabinets, and... even acceptance of advances in controlled directivity horns like their M2!5.

M2!5 Loudspeaker – PBN Audio

YEAR 2020 GESTALT SPEAKERS = coaxial compression driver like the B&C DCX464 (2020 speaker of the year) behind a SEOS24 horn, with a 15" midrange, and two 15" counter-force subwoofers.

2020 GESTALT = copy off of the NEW Smart Kids!
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Old 23rd May 2020, 05:21 AM   #72
xrk971 is offline xrk971  United States
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Dunlavy SC IV schematics ?
Quote:
...moved forward with Linkwitz-Riley crossovers...
Is it really forward, considering the phase wraps over and over now?

1st order crossover is flat phase, Harsch has a 55deg bump, and LR has inverted polarity tweeters in order not to have cancellation dip.

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Old 23rd May 2020, 09:46 AM   #73
wesayso is offline wesayso  Netherlands
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Dunlavy would have hated that idea of "moving forward".
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Old 23rd May 2020, 01:52 PM   #74
Brent71 is offline Brent71
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Originally Posted by wesayso View Post
Dunlavy would have hated that idea of "moving forward".
He would have been 100% against 2nd-order or higher crossovers and ported enclosures for sure.
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Old 23rd May 2020, 04:32 PM   #75
Scottmoose is offline Scottmoose  United Kingdom
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Very true -he would. But from an operational & listening POV it ultimately comes down to how much you care about whether it's nominally a linear phase speaker or not. Some do, some don't. For e.g., I can take it or leave it -I simply can't hear the huge advantages that are sometimes claimed. Clearly others can; fair enough. It's just not a universal guide to quality. For some it might even be the opposite in certain situations -say, if power-handling & dynamic range is their focus, since linear-phase designs by nature tend to be more demanding on the tweeter's low end distortion performance, which may (may) place them at a disadvantage compared to an alternative. YMMV as always.
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Old 23rd May 2020, 05:47 PM   #76
xrk971 is offline xrk971  United States
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Dunlavy SC IV schematics ?
True, I have heard the common failure in SC-IV’s is a blown tweeter. Fortunately, it’s a standard Vifa dome that is not too expensive and replaceable.
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Old 23rd May 2020, 06:27 PM   #77
mark100 is online now mark100  United States
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Dunlavy SC IV schematics ?
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Originally Posted by Scottmoose View Post
..........

For some it might even be the opposite in certain situations -say, if power-handling & dynamic range is their focus, since linear-phase designs by nature tend to be more demanding on the tweeter's low end distortion performance, which may (may) place them at a disadvantage compared to an alternative. YMMV as always.
Yep for sure, if the linear phase design is passive or IIR active.

High SPL and dynamic range work very well with steep linear phase xovers, ime.
But of course, only available via FIR. Always the tradeoffs, huh....
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Old 23rd May 2020, 07:01 PM   #78
Scottmoose is offline Scottmoose  United Kingdom
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'ain't that the truth. Although if I see one more company marketing spiel including the phrase 'designed without compromise'...
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Old Yesterday, 12:57 AM   #79
AllenB is offline AllenB  Australia
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Dunlavy SC IV schematics ?
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Originally Posted by mark100 View Post
steep linear phase xovers, ime.
But of course, only available via FIR.
Is this because the steepness can result in significant group delay?
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Old Yesterday, 02:22 AM   #80
plasnu is online now plasnu  United States
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Not all the linear phase speakers sound the same, IME. Every time I had a chance to hear Dunlavey, my impression was "soft (natural) transient". I have never had the same impression with FIR crossed horns, but there would be some other reasons than phase.
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