And Now For Something REALLY BIG

[Cal Weldon]

Hi James,

I was away and didn't catch up on your ear damage until now. So sorry for you. I hope the others are right and that patience will pull you through until it repairs itself. I can't believe you are even thinking about audio right now, unless of course it is a type of relief from the other things.

Also sad that things didn't work out right away on the horn front. It did seem awfully ambitious so I hope you aren't letting it bother you too much. I don't think I would have been brave enough to try that. I am having a hard enough time with foam board and a hot glue gun making Cornu copies.

[JRKO]

Thanks Cal. I cant quite muster the £50 I need to get a laser gut guide for the final paper horn - especially if I cant make the general basic working model

There's always this type of tractrix to try. It looks a tad simpler....
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.....famous last words

[JRKO]

BTW have you seen this little setup?

multicell heaven click on the images to enlarge

I love the multicells as stand alone speakers in their own little cabinets.

[Cal Weldon]

Dream indeed. I think that's a great way of serving up a multicell. I also can't help but notice the similarity of the bass horn with a Cornu. I wonder if he has incorporated some Fibonacci in there.

I'm going to put that link in the Cornu thread, thanks.

[JRKO]

here are a couple of pic ideas for the bass cabs. Its called Shou sugi ban. Heres 2x little video linky:

Shou Sugi Ban being in Japan
http://www.youtube.com/watch?v=L4CeJIaI5Vg

You can brush and wash it to smooth it out as well if you prefer a smoother look

What do you think as a facia cladding for the bass cab?

[JRKO]

10 cell (5x2) multicells are on their way

starts looking at minidsp..............

[AStroop]

Hi JRKO,
I tried starting a new thread, but for some reason I have had no takers, so I thought I would just ask you!
I am wanting to do something very similar and was wondering what configuration for the Bass cabinets are you looking at now? Last I saw was that you were going to use faitalpro. But as a bass reflex or onken or something else? Maybe I missed something. If so sorry!
Cheers
A

[Rob41]

Originally Posted by ingvar ahlberg

I also like large drivers and still believe that You cant beat qubic inches.

But, i don´t like x-overs, especially if they´re used in the fundamental voice region, say 300-3kHz.

This means i have to use LF drivers that are very good in the voice area, 10-12" is, in my opinion, the best choice for this.
We still want the fantastic low level dynamics that large drivers deliver, what to do?

First try, turned out really ok, was this:



A tiny litle speaker that actually is allmost a 2-way design, the larger of the round parts is a Beyma 21L50, this ,unfortunately out of production, 21" driver is lowpassed at about 85Hz, the smaller round thing is a Beyma 10G40, only lowpassed at about 3k, firing backwards in what could be regarded as a TQWT but with exponential expansion.

The square thing is a Beyma TPL150, AMT driver, system sensitivity at around 100dB and fantastic low-level dynamics.

It moved furniture at pretty modest levels so the 21" was perhaps a bit too large for our livingroom.

What to do then?

Ingvar

Your speakers are beautiful Ingvar! It's ironic that I saw them because I've been conceptualizing something very similar in appearance. I plan to build a similar set but quite a bit more modest with a tiny 15" woofer, 8" mid and a planar tweeter. Although mine will be a bit smaller, I'll separate the speakers into top and bottom cabinets.

Thanks for posting the pics; it's great to see what I'm shooting for.

[JRKO]

Originally Posted by AStroop

I am wanting to do something very similar and was wondering what configuration for the Bass cabinets are you looking at now? Last I saw was that you were going to use faitalpro. But as a bass reflex or onken or something else? Maybe I missed something. If so sorry!

I'm aiming to go FaitalPRO | LF Loudspeakers | 15FH500 (because they are £50 cheaper than the 510 each at the moment and still look very good) in a ported 75l cabinet tuned to 45hz that gives me a -3db at 50hz and -9db at 38hz. All info taken from WinISD.

[AStroop]

Excellent! Thanks for that!
Cheers!