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Old 3rd October 2012, 07:08 PM   #301
zman01 is offline zman01  Bangladesh
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I know this is FH Mk3 flat pak thread - just going a bit OT here. Playing a pair of EL-70 in a P10 mMar-Kel70 cab http://www.frugal-phile.com/boxlib/P...map-231009.pdf - with a Hypex UcD 180HG amp - BT's Le Nocturne De Lumiere sounds surprisingly good. No dearth of top end, and bottom end plenty solid for a 4" driver in a small cab. It's early morning here and listening levels are moderate.

No wonder Dave and Chris like this driver so much.

Edit: The Hypex also deserves praise - very good Class D amp.

Last edited by zman01; 3rd October 2012 at 07:14 PM.
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Old 3rd October 2012, 07:15 PM   #302
Adam0 is offline Adam0  Belgium
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Hi I am interested in your self powered sub... can you give me some details? size, type, amp, phasing and how you connect it - is it from your pre-amp out etc?
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Old 4th October 2012, 06:09 AM   #303
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Quote:
Originally Posted by planet10 View Post
Stock EL70s are available out of the master pack until i run out of already pre-treated EL70 to process. They are $90/pr. Matched & treated drivers, i my opionion and others ar ebetter value at $160/pr.
dave
Hi Dave, could you tell me more about the "modded" EL70's you offer please?
What does the treatment do to the response? In what way does it improve the driver?

Thanks
Willem
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Old 4th October 2012, 07:08 AM   #304
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Quote:
Originally Posted by valvesound View Post
Hi Dave, could you tell me more about the "modded" EL70's you offer please?
What does the treatment do to the response? In what way does it improve the driver?
Click the image to open in full size.

Drivers are 1sr run in for at least a couple hundred hours. Then T/S measured to weed out any defects before treatment.

1/ drivers are pre-treated. a thin coat of PVA seals and ties together the paper fibres on the surface of the cone. This reduces cone self-noise, and smooths response

2/ drivers are EnABLed. This includes a conformal coating after the spots. No-one really knows how or why this works, but it does. The net benefit is increased DDR (downward dynamic range). Think of it akin to removing low level haze (or noise) allowing the driver to reproduce more of the subtle details that flesh out a voice or instrument and more of the complex phase & detail that allows a pair of speakers to provide the illusion of space.

3/ Drivers are measured again, and using a metric based on the T/S must match within 3%, and be efficiency matched within a 1/4 dB. Mark Audio drivers come much better matched than any others i've tested, the spread across a quantitiy of drivers is typically 12-13% with efficiency deltas of near 1 dB.

4/ the major discontinity where the basket joins the magnet is filled with ductseal, streamlining the backside somewhat. A side effect is some damping.

The pretreatment & the conformal coating additionally:

a/ make the cone more opaque to sound coming back thru the cone from inside the box.
b/ the surround is attached to the front of the cone. This creates a small ridge at the join. Both these coatings go up other the attachment area of the surround. This both creates a "ramp" where there was a ridge, and a continuous uniform layer all the way to the moving portion of the surround.

None of this would matter if it did not transform the performance of the driver.

It does not significantly change the "tone" of the driver. If that is what you are concentrating on when doing a comparison you will hear little difference.

If on the other hand you focus on the imaging, on a well done track, the wall behind the speakers will dissapear as you switch and the image will become less attached to the speaker.

If you just listen to the music, the increase in available information lets your brain relax more and you gain a greater emotional connection to the music.

Now hopefully some EL70eN owners will chime in, and make the last bit seem less like marketing bluster.

And in addition, treated drivers include the p10-hifi paid planset for that driver (a $25 value). For the EL70 that document runs 36 pages.

dave
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Old 4th October 2012, 07:34 AM   #305
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very cool Dave!
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Old 4th October 2012, 08:48 AM   #306
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Dave

Because I have no experience with fullrange speakers I have one last concern. I am now very keen on your modded EL70 but the driver response curve shows a roll-off from 10khz to 20khz of almost 10dB. Does this driver perform well enough at these frequency's that a tweeter would not be required as Toppsy mentioned the CHP-70.1 required this?

Willem
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Old 4th October 2012, 05:54 PM   #307
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I do not notice any serious loss of top end, and i don't know of any customers using helper tweeters.

If you want some insurance i'll add a pair of ERT26 (the tweeter Colin uses) to the package for an additional $15.

dave
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Old 5th October 2012, 06:13 AM   #308
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Hi Dave, are these mounted inside the frugal horn or a separate small enclosure? In any of these options where do I find the design?

Willem
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Old 5th October 2012, 06:18 AM   #309
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You could do it either way, i'd ted towards how toppsy implemented them:

Tweeter #3 (CSS ERT26) makes a great Supertweeter

dave
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Old 5th October 2012, 07:37 AM   #310
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yes it looks better that way. the original FH MK3 enclosure is kept in tact and the option of adding or removing the tweet is there.

How do I go about buying the EL70eN (modded) + CSS ERT26 offer from you?
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