Small fullrange for waveguide loading

Defo · 23rd May 2010, 06:53 PM

Cant seem to decide which of these small fullrange drivers to use in a waveguide/horn from 500hz and up. Which would be most dynamic and with the least fatigue?

FE126En
FF125K
TB W4-1320SJ

Cheers

planet10 · 23rd May 2010, 09:43 PM

FE126En is largely an unknown. The older FE126e needs work to minimize the fatiguing 7 k peak.

FF125K has, what i find annoying, a resonance associated with the aluminum dustcap (i have not been able to completely kill that)

TB, an unknown to me.

Add to your list, Alpair 7. One gives up efficiency for control. CHR-70 or CSS EL70 if you are on a budget.

I'm sure there are more as well.

dave

j.michael droke · 24th May 2010, 02:36 AM

Hi there DEFO: I've been operating TB W4-1320sd in several OB configurations for 2 years without problems and generally like the performance, although I have used some HF cut. I've been crossing over biamped at around 100hz+-, so you should not have a problem at 500hz crossover. I am contimplating experimenting with a wave guide, if I can figure out the dimensions for a large WG for 460hz xover. ...regards, Michael

Defo · 24th May 2010, 03:52 PM

Thanks for the reply. Looks like I'm stuck between the TB and the FE126En. I imagine the Fostex has better "snap" and dynamics to it given a notch filter at 7 khz. What I really wonder is if the waveguide/horn loaded TB will achieve the dynamics I crave...

Scottmoose · 24th May 2010, 04:45 PM

If that's what you crave, you might be better off looking at some wide-band compression drivers.

planet10 · 24th May 2010, 07:46 PM

Quote:

Originally Posted by Defo

I imagine the Fostex has better "snap" and dynamics to it given a notch filter at 7 khz.

I have FE126En on the way. We'll see if it needs, or we can figure out, similar tricks as used on the FE126e to ameriolate the 7 k resonance at the source.

En has a different cone material, it will be interesting.

dave

ultrakaz · 25th May 2010, 08:14 AM

Have you considered the Lowther DX55? I use it in a 200Hz-ish, 60 x 90 conical horn with about a 4" throat. Since horns are essentially bandpass, the top is attenuated just enough and works very very dynamically with vivid sound. Sounds similar to a compression driver horn combo, but plays lower, even with first order and without strain. You may need to attenuate it though as I do even with loaded Altec 15"s.

Fostex vis-a vis Lowther are more opaquish, and are better used "full range" in rear horn loaded or bass reflex with correction circuitry.

23rd May 2010, 06:53 PM	#1
Defo diyAudio Member Join Date: Nov 2008	Small fullrange for waveguide loading Cant seem to decide which of these small fullrange drivers to use in a waveguide/horn from 500hz and up. Which would be most dynamic and with the least fatigue? FE126En FF125K TB W4-1320SJ Cheers

23rd May 2010, 09:43 PM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	FE126En is largely an unknown. The older FE126e needs work to minimize the fatiguing 7 k peak. FF125K has, what i find annoying, a resonance associated with the aluminum dustcap (i have not been able to completely kill that) TB, an unknown to me. Add to your list, Alpair 7. One gives up efficiency for control. CHR-70 or CSS EL70 if you are on a budget. I'm sure there are more as well. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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24th May 2010, 02:36 AM	#3
j.michael droke diyAudio Member Join Date: Jan 2009	Hi there DEFO: I've been operating TB W4-1320sd in several OB configurations for 2 years without problems and generally like the performance, although I have used some HF cut. I've been crossing over biamped at around 100hz+-, so you should not have a problem at 500hz crossover. I am contimplating experimenting with a wave guide, if I can figure out the dimensions for a large WG for 460hz xover. ...regards, Michael

24th May 2010, 03:52 PM	#4
Defo diyAudio Member Join Date: Nov 2008	Thanks for the reply. Looks like I'm stuck between the TB and the FE126En. I imagine the Fostex has better "snap" and dynamics to it given a notch filter at 7 khz. What I really wonder is if the waveguide/horn loaded TB will achieve the dynamics I crave...

24th May 2010, 04:45 PM	#5
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	If that's what you crave, you might be better off looking at some wide-band compression drivers.

25th May 2010, 08:14 AM	#7
ultrakaz diyAudio Member Join Date: Oct 2004	Have you considered the Lowther DX55? I use it in a 200Hz-ish, 60 x 90 conical horn with about a 4" throat. Since horns are essentially bandpass, the top is attenuated just enough and works very very dynamically with vivid sound. Sounds similar to a compression driver horn combo, but plays lower, even with first order and without strain. You may need to attenuate it though as I do even with loaded Altec 15"s. Fostex vis-a vis Lowther are more opaquish, and are better used "full range" in rear horn loaded or bass reflex with correction circuitry.

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