fr125s + Woofer or Tweeter?

andrewmc · 18th June 2007, 05:13 PM

Hi Everyone,

I built a pair of the 7L br enclosures for the fr125s. I'm happy with the sound on simple material (voices sound fantastic!), but I'm not happy with the sound on more complex material (fast paced, multiple instruments).

I was considering crossing the fr to a small tweeter like the 1" aura titanium around 3500hz.

Would I be further ahead to cross to a woofer like the DA175 or RS180 somewhere below 1000hz? It seems to me that I could keep the crossover frequency out of the midrange by doing this.

Any advice would be appreciated!

Scottmoose · 18th June 2007, 05:33 PM

I'd do the woofer first actually as taking the LF strain from the 125 will improve dynamics no end. I'd look to using a bigger driver if possible though. A 10in unit would be good.

As and when you decide to add a tweeter, I'd suggest not crossing over so low~3500Hz is slap-bang in a fairly critical musical region. 10 - 11KHz would be my choice; well out of the most important musical zones.

Godzilla · 18th June 2007, 06:00 PM

I recently added a 12" powered sub to my 165k BIBs to good effect... but i also have a super tweeter.

Godzilla

Scottmoose · 18th June 2007, 07:03 PM

Ye Gods Jeff, I take it you like bass then? Best to add another one to even the room LF SPLs out then...

tinitus · 18th June 2007, 10:21 PM

Scott, you said it... a woofer would do the trick, but a 10" that match the sensitivity of FR125 is not known to me

I reckon this 8" TB sub would match nicely

http://www.partsexpress.com/pe/showd...number=264-854

Cal Weldon · 18th June 2007, 10:35 PM

That TB woofer is good value at that price. In fact it's so cheap you might want to consider a plate amp for better control and perhaps cross the fr at 100 Hz 2nd order?

tinitus · 19th June 2007, 03:44 AM

Some plateamps go to 200-250hz

gmilitano · 19th June 2007, 03:49 AM

Hi Andrew,

As others have suggested, I would try the low end first. The lower you cross over, the better. Less than 150Hz. 75-100Hz would be better. As for the tweeter, 10k or so.

Cheers,
Gio.

Scottmoose · 19th June 2007, 07:56 AM

I wouldn't worry if the woofer is more sensitive than the CSS -better to have too much than too little -you can always loose some if needed.

tinitus · 19th June 2007, 09:56 AM

Sure, a plateamp will mean more freedom in selecting a woofer than with a passive filter

But how about BSC ?

18th June 2007, 05:13 PM	#1
andrewmc diyAudio Member Join Date: Jan 2006 Location: Winnipeg, MB	fr125s + Woofer or Tweeter? Hi Everyone, I built a pair of the 7L br enclosures for the fr125s. I'm happy with the sound on simple material (voices sound fantastic!), but I'm not happy with the sound on more complex material (fast paced, multiple instruments). I was considering crossing the fr to a small tweeter like the 1" aura titanium around 3500hz. Would I be further ahead to cross to a woofer like the DA175 or RS180 somewhere below 1000hz? It seems to me that I could keep the crossover frequency out of the midrange by doing this. Any advice would be appreciated!

18th June 2007, 06:00 PM	#3
Godzilla diyAudio Member Join Date: Nov 2005 Location: New York	I recently added a 12" powered sub to my 165k BIBs to good effect... but i also have a super tweeter. Godzilla __________________ www.zillaaudio.com/bib/bib.asp www.ZillaAudio.com

18th June 2007, 10:35 PM	#6
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	That TB woofer is good value at that price. In fact it's so cheap you might want to consider a plate amp for better control and perhaps cross the fr at 100 Hz 2nd order? __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

19th June 2007, 03:49 AM	#8
gmilitano diyAudio Member Join Date: Apr 2004 Location: Winnipeg, Manitoba	Hi Andrew, As others have suggested, I would try the low end first. The lower you cross over, the better. Less than 150Hz. 75-100Hz would be better. As for the tweeter, 10k or so. Cheers, Gio. __________________ DIY Audio Projects [ 10" DIY Subwoofer \| FE127E Sealed Bipole \| [ LM3886 Chip Amp / Gainclone \| K-12M Tube Amp Kit ]

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18th June 2007, 05:33 PM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	I'd do the woofer first actually as taking the LF strain from the 125 will improve dynamics no end. I'd look to using a bigger driver if possible though. A 10in unit would be good. As and when you decide to add a tweeter, I'd suggest not crossing over so low~3500Hz is slap-bang in a fairly critical musical region. 10 - 11KHz would be my choice; well out of the most important musical zones.

18th June 2007, 07:03 PM	#4
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Ye Gods Jeff, I take it you like bass then? Best to add another one to even the room LF SPLs out then...

18th June 2007, 10:21 PM	#5
tinitus diyAudio Moderator Join Date: Nov 2005	Scott, you said it... a woofer would do the trick, but a 10" that match the sensitivity of FR125 is not known to me I reckon this 8" TB sub would match nicely http://www.partsexpress.com/pe/showd...number=264-854

19th June 2007, 03:44 AM	#7
tinitus diyAudio Moderator Join Date: Nov 2005	Some plateamps go to 200-250hz

19th June 2007, 07:56 AM	#9
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	I wouldn't worry if the woofer is more sensitive than the CSS -better to have too much than too little -you can always loose some if needed.

19th June 2007, 09:56 AM	#10
tinitus diyAudio Moderator Join Date: Nov 2005	Sure, a plateamp will mean more freedom in selecting a woofer than with a passive filter But how about BSC ?

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