Midranges, midranges, midranges

lovitz · 20th January 2007, 08:59 PM

I'm working on a design that includes the XT25 and the Morel HU9.1. I'd like to use the Vifa D75 midrange, but some other posts on here seem to cast a negative vibe about the D75. I'd like to use it because it's sensitivity is close to the XT25, but SQ wise, is it a good choice?

v-bro · 20th January 2007, 09:28 PM

I have two of them and they really sound like sh**, just any cone midrange would be much preferred....

Every singer suddenly sounds like having a cold with these things...

I have read about very good alternatives here on the forum (HiVi?)

lovitz · 20th January 2007, 09:34 PM

" Every singer suddenly sounds like having a cold with these things... "

Ouch.

That's enough info to start looking at a different options

Thanks

tinitus · 20th January 2007, 11:49 PM

Your Morel woofer is 89db, so you actually need a midrange with less sensitivity, unless you plan to use double woofers

Hezz · 21st January 2007, 12:38 AM

I would generally avoid a dome midrange for a three way system. These kinds of midrange drivers have their uses. They usually work best in a four way system where you need a crossover point somewhat lower than a tweeter can go with a first order filter. It is best to think of them as a low ranging tweeter. It might work OK if you have a crossover frequency to the woofer at around 700 Hz or higher. But this puts the filter right in the fundamentals and is best avoided as it required a very good and tweaked first order crossover not to mess up the fundamental tones.

The tonal quality of the sound in the lower fundamental frequncies of these units are poor. Better to use a 4 or 5 inch driver if you need small. The flange of the D75 is as big as a 4 inch or 5 inch cone driver anyway.

lovitz · 21st January 2007, 12:49 AM

Thanks for the input guys!

grantnsw · 21st January 2007, 10:54 AM

Hi Lovitz,
Just my beginner '2 cents' worth. I have an older version of the D75's - I never liked them - they never sounded good.
So after much deliberation and extremely useful advice from Sreten in this forum, I've decided to upgrade to the Seas MCA15RCY midrange, when I can afford them. Price is pretty good though ~$90 Au,
I'm just short of cash! SPL quoted at Seas is 89.5dB, so they might be a good match? The response looks great too. I hope this helps you. best wishes for your project, grant

tinitus · 21st January 2007, 11:04 AM

Anyone tried this one ?

http://www.tb-speaker.com/detail/1230_04/w4-1129c.htm

holdent · 21st January 2007, 03:15 PM

Why not look at the Dayton RS52? John Krutke (http://www.zaphaudio.com/smalltest/) and MarkK (http://www.markk.claub.net/Testing/M..._test_data.htm) both tested this midrange and really liked it. MarkK also liked the Seas MCA15 but its much more expensive.

lovitz · 21st January 2007, 08:44 PM

well I was browsing the Zaphaudio site and he seemed to no like the Morel, both tweeters and woofers....so I don't know if I'll have to reconsider those....blah....too many options!

20th January 2007, 08:59 PM	#1
lovitz diyAudio Member Join Date: Apr 2005 Location: Vancouver	Midranges, midranges, midranges I'm working on a design that includes the XT25 and the Morel HU9.1. I'd like to use the Vifa D75 midrange, but some other posts on here seem to cast a negative vibe about the D75. I'd like to use it because it's sensitivity is close to the XT25, but SQ wise, is it a good choice?

20th January 2007, 09:28 PM	#2
v-bro diyAudio Member Join Date: May 2006	I have two of them and they really sound like sh**, just any cone midrange would be much preferred.... Every singer suddenly sounds like having a cold with these things... I have read about very good alternatives here on the forum (HiVi?) __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

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20th January 2007, 09:34 PM	#3
lovitz diyAudio Member Join Date: Apr 2005 Location: Vancouver	" Every singer suddenly sounds like having a cold with these things... " Ouch. That's enough info to start looking at a different options Thanks

20th January 2007, 11:49 PM	#4
tinitus diyAudio Moderator Join Date: Nov 2005	Your Morel woofer is 89db, so you actually need a midrange with less sensitivity, unless you plan to use double woofers

21st January 2007, 12:38 AM	#5
Hezz diyAudio Member Join Date: Dec 2002 Location: Utah	I would generally avoid a dome midrange for a three way system. These kinds of midrange drivers have their uses. They usually work best in a four way system where you need a crossover point somewhat lower than a tweeter can go with a first order filter. It is best to think of them as a low ranging tweeter. It might work OK if you have a crossover frequency to the woofer at around 700 Hz or higher. But this puts the filter right in the fundamentals and is best avoided as it required a very good and tweaked first order crossover not to mess up the fundamental tones. The tonal quality of the sound in the lower fundamental frequncies of these units are poor. Better to use a 4 or 5 inch driver if you need small. The flange of the D75 is as big as a 4 inch or 5 inch cone driver anyway.

21st January 2007, 12:49 AM	#6
lovitz diyAudio Member Join Date: Apr 2005 Location: Vancouver	Thanks for the input guys!

21st January 2007, 10:54 AM	#7
grantnsw diyAudio Member Join Date: Aug 2006	Hi Lovitz, Just my beginner '2 cents' worth. I have an older version of the D75's - I never liked them - they never sounded good. So after much deliberation and extremely useful advice from Sreten in this forum, I've decided to upgrade to the Seas MCA15RCY midrange, when I can afford them. Price is pretty good though ~$90 Au, I'm just short of cash! SPL quoted at Seas is 89.5dB, so they might be a good match? The response looks great too. I hope this helps you. best wishes for your project, grant

21st January 2007, 11:04 AM	#8
tinitus diyAudio Moderator Join Date: Nov 2005	Anyone tried this one ? http://www.tb-speaker.com/detail/1230_04/w4-1129c.htm

21st January 2007, 03:15 PM	#9
holdent diyAudio Member Join Date: Nov 2005 Location: Ontario	Why not look at the Dayton RS52? John Krutke (http://www.zaphaudio.com/smalltest/) and MarkK (http://www.markk.claub.net/Testing/M..._test_data.htm) both tested this midrange and really liked it. MarkK also liked the Seas MCA15 but its much more expensive.

21st January 2007, 08:44 PM	#10
lovitz diyAudio Member Join Date: Apr 2005 Location: Vancouver	well I was browsing the Zaphaudio site and he seemed to no like the Morel, both tweeters and woofers....so I don't know if I'll have to reconsider those....blah....too many options!

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