Scan 3 way

Beau · 9th July 2005, 12:06 AM

Ok, so I gots me some 25w/8565-01 SS drivers for bass (2 per side) The mid is where im coming unstuck.
I have on hand a pair of 18w8531 mids, speced at 87db sens, but by my calculations my woofers when run in parallel will yeild 88db (allowing for 6db of loss into 4pi space)
Should I stick with the SS mid (and its poor dispersion above 2 khz) or move to a Seas w18ex?
TIA Beau.

FourDegrees11 · 9th July 2005, 12:53 AM

Given the quality of the woofers your using, I'm guessing you have a tweeter capable of crossing at, or below, 2 khz. If not, I would consider a 5 1/4" mid.

David Gatti · 9th July 2005, 07:29 AM

I strongle recommend you use a dedicated 4 - 6.5" midrange driver (better detail & dispersion) rather than the 7" bass/mid which isn't at it's best above 1kHz.

www.gattiweb.com

hermanv · 25th July 2005, 11:30 PM

My partner and I used the Scan Speak 25W-8565-01 in our three way design. We have had good results with the Audio Technologies modular units for our midrange both the 4"' and the 5" have great promise.

We used a revelator for our tweeter so all three drivers can trace their roots back to Mr. Skaaning or son!

On the 8565, beware that peak at 2500 Hz, it sounds awful, we notched it out (it needed to be down about 25dB before it became inaudible) and ended up with very good bass, extended lows, detailed and reasonably fast (the advantage of a 10" over some of the large diameter woofers you might otherwise use to get true 20-22Hz extension).

9th July 2005, 12:06 AM	#1
Beau diyAudio Member Join Date: Jul 2003 Location: Sunshine Coast	Scan 3 way Ok, so I gots me some 25w/8565-01 SS drivers for bass (2 per side) The mid is where im coming unstuck. I have on hand a pair of 18w8531 mids, speced at 87db sens, but by my calculations my woofers when run in parallel will yeild 88db (allowing for 6db of loss into 4pi space) Should I stick with the SS mid (and its poor dispersion above 2 khz) or move to a Seas w18ex? TIA Beau.

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9th July 2005, 12:53 AM	#2
FourDegrees11 diyAudio Member Join Date: Jun 2005 Location: Missouri	Given the quality of the woofers your using, I'm guessing you have a tweeter capable of crossing at, or below, 2 khz. If not, I would consider a 5 1/4" mid.

9th July 2005, 07:29 AM	#3
David Gatti diyAudio Member Join Date: Mar 2004 Location: Melbourne, Australia	I strongle recommend you use a dedicated 4 - 6.5" midrange driver (better detail & dispersion) rather than the 7" bass/mid which isn't at it's best above 1kHz. www.gattiweb.com

25th July 2005, 11:30 PM	#4
hermanv diyAudio Member Join Date: Apr 2004 Location: Northern California	My partner and I used the Scan Speak 25W-8565-01 in our three way design. We have had good results with the Audio Technologies modular units for our midrange both the 4"' and the 5" have great promise. We used a revelator for our tweeter so all three drivers can trace their roots back to Mr. Skaaning or son! On the 8565, beware that peak at 2500 Hz, it sounds awful, we notched it out (it needed to be down about 25dB before it became inaudible) and ended up with very good bass, extended lows, detailed and reasonably fast (the advantage of a 10" over some of the large diameter woofers you might otherwise use to get true 20-22Hz extension).

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