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Old 30th January 2008, 05:16 PM   #21
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Quote:
Originally posted by planet10
The Omnes sensitivity is probably optimistic... to get that high efficiency one would likely need an 8" or larger, which probably limits you to Fertin or Supravox. A new contender would probably be the 9" Feastrex, but it may not like an OB, you need seriously deep pockets, and it would probably be a waste restricting it to such a narrow band. As well it would be very challenging to find woofer & tweeter that would mate with it.

Relaxing things a bit further efficiency wize to bring the price down to what mere mortals can afford, the Visaton B200 with phase plugs is a good candidtae. A 5k XO is pretty low thou.

dave
I think I'd need a pair of those minimum for high output (120 db). If I do that the rising response won't be so bad and the treble won't matter much.
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Old 30th January 2008, 05:18 PM   #22
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"I was thinking that myself! The dust cap is "Zurette" what ever that means??? Maybe it's there to cause the peak for guitar? I think I'll carefully cut one out and see. "

I suspect it will help a lot. The dustcap looks huge on that driver for no good reason compared to the size of the voicecoil.
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Old 30th January 2008, 05:23 PM   #23
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Quote:
Originally posted by Caferacer
"I was thinking that myself! The dust cap is "Zurette" what ever that means??? Maybe it's there to cause the peak for guitar? I think I'll carefully cut one out and see. "

I suspect it will help a lot. The dustcap looks huge on that driver for no good reason compared to the size of the voicecoil.
Thanks, I think you are right, I love the midrange but the top end is a bit ragged, The answer to my Wide Range mid may already be here...

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Old 30th January 2008, 09:43 PM   #24
OzMikeH is offline OzMikeH  Australia
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AER's MK1 is 103dB/W it's an 8 incher.
Quite beamy up high which is the ONLY thing I don't like about it. in the right box it'll do 40Hz with ease. Bass you can feel with 1 watt, it's bizarre.
not sure how it's response is OB, but you have 3dB to throw away with a filter.
I'd run it up till it starts getting beamy then XO to something special with it's own amp. I think around 15k but it's been about a year since I listened to one. If you're in the right seat in the room at the right height they're magical. It's what got me back into audio again.
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Old 31st January 2008, 01:34 AM   #25
John L is offline John L  United States
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I know that this driver only has a 94db rating, but have you been following the B20 scene lately? Lots of neat little mods that turn this inexpensive 8" driver into a custom fireplug.
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Old 31st January 2008, 03:11 AM   #26
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Quote:
Originally posted by John L
I know that this driver only has a 94db rating, but have you been following the B20 scene lately? Lots of neat little mods that turn this inexpensive 8" driver into a custom fireplug.
IIRC it is actually closer to 90 in real life

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Old 31st January 2008, 04:30 AM   #27
navin is offline navin  India
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Quote:
Originally posted by Magnetar
So if you guys were to pick the best 'Wide Range' driver for use between 120 and 5K what would you use? It would be electronically high passed and used on open baffle...Hemp Cone
Quote:
Originally posted by Magnetar
high QTS (for use on a baffle) no rising response, 100 db sensitivity and can handle some power with little to no coloration,
Quote:
Originally posted by Magnetar
six to ten inch
In order of price
Omnes 8"
Hemp FR8
Visaton B200
Supravox 165/215 RTF (not bicone)
Supravox 215 Signature
Veravox 7x
Fertin 20D

but I would consider a freq. response of 60-10k (2 octaves wider than your specs) so that your bass and hf drivers can be easier integrated. Also consider a driver with a minimlar breakup as this will allow you to integrate the HF driver without using a LPF filter on the widerange.

BTW what bass and hf drivers do you have in mind.

Quote:
Originally posted by inrank
http://www.spectrumaudio.de/breit/om...esaudioL8.html
i used them on a relatively small baffle, about 18"
can that baffle be folded so say somethng like 12-15" wide with 3-4" wings on either side?

Quote:
Originally posted by planet10
The Omnes sensitivity is probably optimistic...
by how much? about 3db? that would bring it to the same level as the Fertin 20D.
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Old 31st January 2008, 07:38 AM   #28
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Quote:
Originally posted by navin
Omnes 8"... by how much? about 3db? that would bring it to the same level as the Fertin 20D.
I haven't measured mine, but holding it in your hand, it gives the impression that it should be relatively cheap, and i'd be surprised if efficiency is over 92 dB. But that is just seat of the pants.

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Old 31st January 2008, 11:37 AM   #29
sumacSK is offline sumacSK  Slovakia
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I think that most of those fullrange drivers will not be efficient enough for you (especially below 1KHz or so). This fostex looks rather nice: http://www.fostexinternational.com/d...pdf/ff225k.pdf but it has really small xmax.. maybe using 2 per side? From pro drivers this one seems interesting http://www.ciare.com/pdf/catalogo/PM250.pdf and really 100dB! There are some distortion measurements of this driver on german forum that looks very nice..
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Old 31st January 2008, 12:27 PM   #30
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Quote:
Originally posted by navin


but I would consider a freq. response of 60-10k (2 octaves wider than your specs) so that your bass and hf drivers can be easier integrated. Also consider a driver with a minimlar breakup as this will allow you to integrate the HF driver without using a LPF filter on the widerange.

BTW what bass and hf drivers do you have in mind.

can that baffle be folded so say somethng like 12-15" wide with 3-4" wings on either side?

by how much? about 3db? that would bring it to the same level as the Fertin 20D.
Thanks!

I don't like the idea of crossing the treble in that high or crossing the bass to mid that low for various reasons. Mostly I don't think there is a single driver that will have that efficiency and power handling over that range on an open baffle, and if it did I think I'd be compromising in IM distortion that I find clearly audible and irritating. I quad amp with horn loaded low bass.

The baffle can be any size, here is the bass section: five 16 ohm woofers in parallel -

Click the image to open in full size.

I have several HF drivers - ribbons AMT, compression drivers/tweeters - the best sounding is the B&C DH10 in a Transylvania slotted tube. It's best used above 3K and has plenty of sensitivity and wide dispersion.
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