Best cabinet design for ten thumbed lowther EX3 owner!? please - Page 2 - diyAudio
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Old 23rd November 2006, 12:18 AM   #11
KeithC is offline KeithC  United Kingdom
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Join Date: Sep 2005
Quote:
Originally posted by Bob Brines
A problem with adding a sub to the bottom of an OB: Your OB, Lowther or anything else, is rolling off at 6 dB/octave, and with EX4's, that roll off starts pretty high. You need to roll your sub off at a LOW rate to match the OB roll off. Better, you really need to high-pass the OB. A second problem is that the driver is going to be exceeding the 1mm Xmax long before the sub rolls in.

I've had good luck, at least with BR's and MLTL's using the receiver DSP to do the cross-over. I presume that using a digital cross-over would work equally well. I doubt that you will get it to work very well with a passive XO.

Bob
Each to his own - I really don't like too much bass, really only used a sub to add bottom end texture.

Trying to match a sub to Lowthers is a nightmare, I have a dual voice coil Volt unit with relatively low XMAX that might be worth a go though.

Supposedly, QMAX of the Lowthers is way too low for them to make good OB units, but I found they gave a wonderfully open soundstage. I suspect that the EX accoustic chambers actually help here.

Havn't tried OB with EX3 or EX4 - EX4's have better bottom end extension than the others though, they are really the first unit I have tried that I'd truly call 'full range'.

I never use XOs if I can possibly avoid it - I have collected passive, analogue active and digital active units trying to find one that I could live with.

I recently blew a voice coil & had to use the wife's Quad C22s until replacement units arrived - a horrible experience, like listening through a heap of blankets.

I deliberately bought Lowther drivers 4 years ago as a route to diy/modification rather than replacement, and I guess I got what I was after
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Old 23rd November 2006, 09:04 AM   #12
klykx is offline klykx  France
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Join Date: May 2006
Gents,

Thankyou for all the inputs. There is much food for thought in what you are saying.

I really don't think I'll get away with OBs (looked MJKs project) in my little flat (At least not without an expensive divorce!). I really don't feel comfortable voiding the warranty on the most expensive things I've bought this year so resonant cabinets are out for the moment.

Looks to me like the horns are going to be the way to go. The 206-esr cabinet certainly looks pretty but the 208-sigma looks easier to build. No Idea which one I should go for.

I looked at other threads and articles about horn expansion...neither of these seem to fit any of the conical, tractrix, exponential forms.

There must be something fundamental about these cabinets that I don't understand. Is ther any way of giving me an idea of how an EX3 would perform in them?

thanks again gents for all your help.


Peter
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Old 14th March 2013, 02:41 PM   #13
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Join Date: Apr 2011
Hello,

I wanted to revive this thread.

Any new thoughts/experience about best enclosures for Lowther EX3 drivers for low power SET amplifiers?

I have been researching and according to comments, best seems to be using an Aluminum coil, and the Teresound enclosure (which doesn't seem to be available as public info).

Best!
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Old 15th March 2013, 03:14 AM   #14
Bare is offline Bare  Canada
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Join Date: Dec 2001
Location: vancouver
Personal opinion/experiences??
Lowthers (from wasted years trying) are THE worst most overpriced Speakers available.
More Hype than reality perf wise. Worst part is they suck you into trying several complex difficult to build well 'enclosures in the vain attempt to get them to work 'satisfyingly' Never happens until you sell the contraptions on..
Harsh? You Bet! it was meant to be.. these things are Dangerous junk IMO. Avoid.
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Old 11th October 2013, 10:20 AM   #15
BenZene is offline BenZene  United States
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Join Date: Feb 2007
Location: California
Default Best Cabinet Design ...

Hi Charly,
I'm using a Big Fun Horn designed by Ketil Parow of Norway for my ex3's. These horns are quite huge for my 12' x 20' x 9' listening space. They sound awesome for me. I listen to different kinds of music from classics, jazz, rock etc. Per Ketil's specs, these horns go down to the low 30's. And I believe him! I got the design from the internet. You can also email Ketil for some advice if you want to build one or have one built for you. Me, I had someone build it for me!
These are my second lowthers. The first, dx3's i'll most likely upgrade to the ex4's once I have saved enough money.
Hope this helps.
BenZene
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