What is most important when choosing driver? - Page 3

ScottG · 10:33 PM

Quote:

Originally Posted by Starre

And for tweeter: Seas 27TFF

For a "2-way" I'd use the Scan Speak Discovery 10F/4424G00 (or its 8 ohm version) for a "tweeter"..

http://www.zaphaudio.com/temp/Scan-S...4424G00-FR.gif
http://www.zaphaudio.com/temp/Scan-S...5-30-45-60.gif
http://www.zaphaudio.com/temp/Scan-S...424G00-CSD.gif
http://www.zaphaudio.com/temp/Scan-S...4424G00-HD.gif

..and then design around that.

Starre · 22nd June 2012, 10:45 PM

Too expensive! Thanks for the suggestion.

Starre · 22nd June 2012, 11:03 PM

Well, it costs approx. 80 Euro.

ScottG · 22nd June 2012, 11:06 PM

Quote:

Originally Posted by Starre

Well, it costs approx. 80 Euro.

Yes.. but it can save you more in crossover parts cost (..a LOT more).

(..and make for an easier design as well as the option for a MUCH lower freq. response - depending on the woofer.)

Starre · 22nd June 2012, 11:07 PM

Yes I see your point ScottG. I will consider your suggestion.

Inductor · 12:15 AM

Good point to considerer. Better to spend 40.00+ of driver parts than of better caps or extra components. Valid consideration, Starre if you think it will sound better.
Working with a 4" Midrange as a tweeter certainly will not be the standard. But who knows what can be done.
Is your listening room narrow or large?

Inductor · 12:47 AM

Quote:

Originally Posted by Starre

Interesting PeteMcK, I think the same, good value and easy to work with. Not decided if using sealed or BR box though...

To use sealed enclosure make sure to use an adequate driver... (who knows?).
Sealed or Ported Enclosure Calculator
Driver good for BR (SEAS CA18RLY nice in 32 L to 42 L) and quarter wave.

PeteMcK · 23rd June 2012, 06:36 AM

re: 'sealed or BR box' - BR, ~ 40L tuned to the low 40s....

(probably good in TL or MLTL too...)

Starre · 10:14 AM

Inductor: I used that calculator for CA18RLY and it said it was fine either way. Do you think the crossover for CA18RLY and 27TFF need to be complicated/expensive?

fatmarley · 23rd June 2012, 11:07 AM

Going by an online calculator, the CA18RLY will work well in a 25ltr box (QTC = 0.7) with an f3 of 63Hz.

Someone over a the PE forum said that their old AR18 has an f3 of 62Hz but because of the high'ish Q design (QTC = 1 IIRC), they had a steep roll-off. I owned some AR18s a while back and thought the bass was really good, so the CA18RLY in a 25ltr box should be better (more accurate and go a bit deeper) but have less authority being a smaller driver.

IIRC the Seas 27TFF (or was it the 25TFF?) was used in the Proac Studio 100. I used to own those speakers and I thought they had a nice, crisp and clean treble.

With the crossover done right, I think that could make a nice combination.

22nd June 2012, 11:53 PM	#26
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	Good point to considerer. Better to spend 40.00+ of driver parts than of better caps or extra components. Valid consideration, Starre if you think it will sound better. Working with a 4" Midrange as a tweeter certainly will not be the standard. But who knows what can be done. Is your listening room narrow or large? __________________ NEXT-proaudio Portugal Estoril Jazz 2013 Last edited by Inductor; 23rd June 2012 at 12:15 AM.

23rd June 2012, 06:36 AM	#28
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Western Sydney	re: 'sealed or BR box' - BR, ~ 40L tuned to the low 40s.... (probably good in TL or MLTL too...) __________________ Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency

23rd June 2012, 10:06 AM	#29
Starre diyAudio Member Join Date: Aug 2011 Location: Stockholm	Inductor: I used that calculator for CA18RLY and it said it was fine either way. Do you think the crossover for CA18RLY and 27TFF need to be complicated/expensive? Last edited by Starre; 23rd June 2012 at 10:14 AM.

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22nd June 2012, 10:45 PM	#22
Starre diyAudio Member Join Date: Aug 2011 Location: Stockholm	Too expensive! Thanks for the suggestion.

22nd June 2012, 11:03 PM	#23
Starre diyAudio Member Join Date: Aug 2011 Location: Stockholm	Well, it costs approx. 80 Euro.

22nd June 2012, 11:07 PM	#25
Starre diyAudio Member Join Date: Aug 2011 Location: Stockholm	Yes I see your point ScottG. I will consider your suggestion.

23rd June 2012, 11:07 AM	#30
fatmarley diyAudio Member Join Date: Aug 2003 Location: Cheltenham	Going by an online calculator, the CA18RLY will work well in a 25ltr box (QTC = 0.7) with an f3 of 63Hz. Someone over a the PE forum said that their old AR18 has an f3 of 62Hz but because of the high'ish Q design (QTC = 1 IIRC), they had a steep roll-off. I owned some AR18s a while back and thought the bass was really good, so the CA18RLY in a 25ltr box should be better (more accurate and go a bit deeper) but have less authority being a smaller driver. IIRC the Seas 27TFF (or was it the 25TFF?) was used in the Proac Studio 100. I used to own those speakers and I thought they had a nice, crisp and clean treble. With the crossover done right, I think that could make a nice combination.

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