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Multi-Way Conventional loudspeakers with crossovers

250Hz-2kHz horn for B&C 8PE21
250Hz-2kHz horn for B&C 8PE21
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Old 15th March 2019, 05:56 PM   #11
apolinary is offline apolinary  Poland
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Hello arcgotic,
Thanks for the ideas. However, I tried to play DE250 down to 1200Hz and it was good unless you didn't play loud. I think my ears are very sensitive regarding drivers' distorsion and I experienced some harshness I would like to avoid. I think that 1500Hz is the lowest point for me. From the other hand these DE250 drivers are quite new, maybe they just need some brake-in...
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Old 15th March 2019, 06:07 PM   #12
arcgotic is offline arcgotic  Romania
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I listen in a 22mp room and not heard distortion, crossed at 1100 LR4.

Maybe you can change the CD, borrow one 1.4", to see when crossed at 850-1k, how you like the 'scene'.
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Old 15th March 2019, 07:34 PM   #13
apolinary is offline apolinary  Poland
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arcgotic,
I was thinking about FaitalPro HP140 to go lower but DE250 sound so good that I it would be a shame not to try to put them into some suitable system and listen to for some time...
I am happy with the open baffle low end as well. What I'm missing is the good in-between.
I tried open baffle midrange, something like Linkwitz' LX521 but it didn't sound well to my ears...
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Old 15th March 2019, 11:29 PM   #14
AllenB is offline AllenB  Australia
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Quote:
Originally Posted by apolinary View Post
DE250 down to 1200Hz and it was good unless you didn't play loud. I think my ears are very sensitive regarding drivers' distorsion and I experienced some harshness
Maybe this is horn distortion or room contributions.
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Old 16th March 2019, 04:03 AM   #15
frangus is offline frangus  Australia
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Quote:
Originally Posted by apolinary View Post
Hello arcgotic,
Thanks for the ideas. However, I tried to play DE250 down to 1200Hz and it was good unless you didn't play loud. I think my ears are very sensitive regarding drivers' distorsion and I experienced some harshness I would like to avoid. I think that 1500Hz is the lowest point for me. From the other hand these DE250 drivers are quite new, maybe they just need some brake-in...
DE250 does sound harsh at higher volume compared to radian and peerless CD’s

I keep saying that but nobody listens

Ps check this out for reference. It’s a well designed midhorn for the excellent 8pe21 driver 135 hz Mid Bass Horn - The Paper Horn by Inlow Sound

Last edited by frangus; 16th March 2019 at 04:06 AM.
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Old 16th March 2019, 04:10 AM   #16
freddi is offline freddi  United States
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250Hz-2kHz horn for B&C 8PE21
@arcgotic - regarding the Visaton FRS8M tractrix horn combo - what approximately is its one watt one meter sensitivity ? I've got an exponential horn around that size - longer
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Old 16th March 2019, 08:17 AM   #17
arcgotic is offline arcgotic  Romania
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@Freddi - I don't know, sorry.
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Old 16th March 2019, 07:07 PM   #18
ErnieM is online now ErnieM  United States
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Quote:
Originally Posted by frangus View Post
DE250 does sound harsh at higher volume compared to radian and peerless CDs

I keep saying that but nobody listens

[/url]
Agreed.
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Old 16th March 2019, 07:41 PM   #19
apolinary is offline apolinary  Poland
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Hi frangus,
Thanks for the inlowsound link, I read that some time ago. The problem is that my experience with horn designs is next to none so, for the very first build I would prefer something already designed and checked. Or at least something proposed by a experienced person. For example a horn similar in construction to E. Forker 300Hz tractrix horn but modified to work with the given driver and expected frequency band. Of course, I'm aware that giving precise values (like throat, mouth dimensions, lenght of the horn etc.) maybe by far more complicated but I still belive that some rough dimension can be quite easy calculated by a person who built a horn or two...
Once again, I'm not sticked to the 8PE21, maybe other drivers are more suitable for the given fq band.
Click the image to open in full size.
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Old 16th March 2019, 09:12 PM   #20
Audiodidakt is offline Audiodidakt  Norway
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Inlow’s 135hz horn is designed for 8pe21, is an easy build and has rave reviews.
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