active horn or dome? I cant decide

savage440 · 20th May 2011, 02:26 AM

Im starting To design a TM 2 way active speaker for 2 channel music and home theatre mains. The woofer will be a Aurum Cantus AC-250F1 10" Woofer. I cant decide what HF driver I should use. Either the Dayton Audio RS28F-4 silk dome or the Eminence PSD:2002S-8 Titanium Driver with a 90x 60 wave-guide. What would give me the best sound quality? thanks

planet10 · 20th May 2011, 04:27 AM

With a 10" woofer you are likely going to need to XO low. The waveguide, or a good mid-tweeter (with XO <400 Hz) is your best bet.

dave

mondogenerator · 20th May 2011, 04:45 AM

if the waveguide is anything lke the celestion one i have, which is 90°x60° ellipical, then the waveguide probably wont be much use at 400Hz either. If i misunderstood your description then ignore what i wrote!

planet10 · 20th May 2011, 04:54 AM

I'd expect a waveguide to be XOed at about 1000 Hz. The mid-tweeter approach would warrant an XO <400 Hz.

dave

AllenB · 20th May 2011, 05:04 AM

Running a 10" up to 1000Hz should be no trouble with the right driver, and running high like that (or even higher) would be favourable as far as the conventional waveguide approach is concerned.

mondogenerator · 05:16 AM

Quote:

Originally Posted by planet10

I'd expect a waveguide to be XOed at about 1000 Hz. The mid-tweeter approach would warrant an XO <400 Hz.

dave

Agreed. I thought id got the wrong idea then for a second....

Quote:

Originally Posted by AllenB

Running a 10" up to 1000Hz should be no trouble with the right driver, and running high like that (or even higher) would be favourable as far as the conventional waveguide approach is concerned.

Agreed again. even though the cut off for my waveguide/horn , is somewhat higher than 1k, i think its primarily for a compression driver, and states 3k F3. is the waveguide 60x90° or 60x90cm...confused....im not waveguide expert, but isnt 1k too low for this waveguide? EVEN if the compression drivers Fs is LOW. Id favour the midtweeter approach, although the waveguide is understandably a tempting idea.

savage440 · 20th May 2011, 05:17 AM

Quote:

Originally Posted by mondogenerator

Agreed. I thought id got the wrong idea then for a second....

Agreed again. even though the cut off for my waveguide/horn , is somewhat higher than 1k, i think its primarily for a compression driver, and states 3k F3. is the waveguide 60x90° or 60x90cm...confused....

The waveguide is 60x90°, the woofer is good to about 2k. I was thinking of crossing over at 1.6k(ish) the f3 in unibox is 29hz in a 70liter box.
what would the overall sound quality difference be between the two types?

picowallspeaker · 20th May 2011, 05:18 AM

No soft domes for WG . Pressure in the vicinity of the cone is not the same as in direct radiation .

savage440 · 20th May 2011, 05:20 AM

Quote:

Originally Posted by picowallspeaker

No soft domes for WG . Pressure in the vicinity of the cone is not the same as in direct radiation .

I meant either or. A waveguide with the Eminence PSD:2002S-8 OR the Dayton Audio RS28F silk dome with no waveguide.

picowallspeaker · 20th May 2011, 06:17 AM

What about something like the big Hi-vi planar tweeter with WG ,the RT2H - ?!?

20th May 2011, 02:26 AM	#1
savage440 diyAudio Member Join Date: Aug 2010	active horn or dome? I cant decide Im starting To design a TM 2 way active speaker for 2 channel music and home theatre mains. The woofer will be a Aurum Cantus AC-250F1 10" Woofer. I cant decide what HF driver I should use. Either the Dayton Audio RS28F-4 silk dome or the Eminence PSD:2002S-8 Titanium Driver with a 90x 60 wave-guide. What would give me the best sound quality? thanks

20th May 2011, 04:27 AM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	With a 10" woofer you are likely going to need to XO low. The waveguide, or a good mid-tweeter (with XO <400 Hz) is your best bet. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

20th May 2011, 04:45 AM	#3
mondogenerator diyAudio Member Join Date: Sep 2009 Location: England	if the waveguide is anything lke the celestion one i have, which is 90°x60° ellipical, then the waveguide probably wont be much use at 400Hz either. If i misunderstood your description then ignore what i wrote! __________________ Im the guy that speaks in haste, and makes ill conceived theories, thinks math is a necessary evil, but i know something.Sometimes it bugs me, then i then i realise that theres 10 more just the same.So i guess Mulder was right. We are not alone.

20th May 2011, 04:54 AM	#4
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	I'd expect a waveguide to be XOed at about 1000 Hz. The mid-tweeter approach would warrant an XO <400 Hz. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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20th May 2011, 05:04 AM	#5
AllenB diyAudio Member Join Date: Oct 2008	Running a 10" up to 1000Hz should be no trouble with the right driver, and running high like that (or even higher) would be favourable as far as the conventional waveguide approach is concerned.

20th May 2011, 05:18 AM	#8
picowallspeaker diyAudio Member Join Date: Apr 2007	No soft domes for WG . Pressure in the vicinity of the cone is not the same as in direct radiation .

20th May 2011, 06:17 AM	#10
picowallspeaker diyAudio Member Join Date: Apr 2007	What about something like the big Hi-vi planar tweeter with WG ,the RT2H - ?!?

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