Sonus Faber's ported midranges

Mos Fetish · 30th January 2004, 10:39 PM

Both the SF Cremona & Amati have ported midranges.

Anyone know why SF would use this alignment for the 6.5/7"" Scanspeak mid?

I think they use 1st order for their xo. Could this be a reason or is there something about the SS drivers that would benefit from this porting?

Mos

Mos Fetish · 30th January 2004, 10:44 PM

Cremona:

Mos Fetish · 30th January 2004, 10:45 PM

Amati:

CeramicMan · 31st January 2004, 07:52 AM

There could be any number of reasons. One that comes to mind is that SF can achieve a 5th-order high-pass filter with just a capacitor and the mechanical filtering of the ported enclosure (1st order + 4th order). Otherwise they would either have to put up with 3rd or 2nd-order filtering in a sealed box, or use a much more complex crossover circuit. I would personally stay with a sealed midrange and avoid the mechanical and functional nuisance of a port. I'd rather build a more complicated passive crossover, or even better: an active crossover.

CM

30th January 2004, 10:39 PM	#1
Mos Fetish diyAudio Member Join Date: Feb 2003 Location: New Zealand	Sonus Faber's ported midranges Both the SF Cremona & Amati have ported midranges. Anyone know why SF would use this alignment for the 6.5/7"" Scanspeak mid? I think they use 1st order for their xo. Could this be a reason or is there something about the SS drivers that would benefit from this porting? Mos

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31st January 2004, 07:52 AM	#4
CeramicMan diyAudio Member Join Date: Nov 2003 Location: Brisbane, QLD	There could be any number of reasons. One that comes to mind is that SF can achieve a 5th-order high-pass filter with just a capacitor and the mechanical filtering of the ported enclosure (1st order + 4th order). Otherwise they would either have to put up with 3rd or 2nd-order filtering in a sealed box, or use a much more complex crossover circuit. I would personally stay with a sealed midrange and avoid the mechanical and functional nuisance of a port. I'd rather build a more complicated passive crossover, or even better: an active crossover. CM

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