Slate/stone speaker cabinets.

My aim with this next cabinet design, is to remove the cabinet 'sound' from the equation as much as possible.

Despite my attempts at damping the current cabs, the ol' knuckle rap test shows there's still significant resonance in the lower part of the enclosure where the panels are bigger, and unfortunately, this is of course where the critical mid-bass driver sits.

At least I'm lucky enough to be totally happy with the aesthetics of the cabs otherwise:

http://i682.photobucket.com/albums/v...s/P1010202.jpg

which means I can concentrate on getting the construction right this time.

I will be adding two bracing 'hoops' horizontally within the section below the mid-bass, which will stiffen front, back and side panels.

The other thing I will do is to borrow an accelerometer and oscilloscope from an engineer friend and do more scientific testing alongside listening tests.

Anyone remember these concrete jobbies?

http://www.avance-audio.net/en/about.asp

http://www.avance-audio.net/en/products_show.asp?id=375


:)

Quote:

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Originally Posted by Mike Homar

Anyone remember these concrete jobbies?

http://www.avance-audio.net/en/about.asp

http://www.avance-audio.net/en/products_show.asp?id=375


:)

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Yes my local branch of Radio rentals did these along with Luxman, Target, A&R Cambridge and a few other brands I can't remember...that was about 20 years ago.

The links are not working for me :confused:


Regards D S D L

I seem to remember a truncated pyramid floorstander with a concrete cabinet - are they the ones?

Talking of removing the effect of the cabinet, I always wanted to have a listen to the Mordaunt Short System 442's but never got the chance.

I used to have table made of Corian (Solid Tech) really good inert stuff

Quote:

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Originally Posted by The Grand Wazoo

I seem to remember a truncated pyramid floorstander with a concrete cabinet - are they the ones?

---

Yup... but they got a bit 'posher' later on I think.

Links working now....Nice speakers shame about the electronics. What on earth...no style no brand identity. Marantz, Denon, Harmon Kardon clones....identity kit copies from China by the looks of it IMHO.

Jamo screwed up trying this a few years ago IMHO...plasmas and all in one dvd home cinema kit...disaster. They went from having a lovely self efficient factory (been there, very nice) to not, and being bought by a foreign company.


Regards D S D L

Right, well things are progressing well.....

I've found a small company who were more than happy to producing the cabs in 19mm Corian, in fact they were quite enthusiastic because it was a 'different and interesting project' It not cheap though as the two cabs will need a full 760x3680mm sheet which costs £500 for the materials alone....

Finish and quality should be awesome though and accoustically 'dead' compaired with anything apart from stone.

I'm also awaiting a quote from another company who are equally confident about producing them in Cumbrian slate, which would also be fantastic, assuming I can find a team of Sherpas to help me move them.... Nice touch was that he knows someone who can produce a rolled-edge bass port in stainless steel.

Not sure what will kill me first, my other half, my bank manager or my back...

Not sure if this has been mentioned yet, but I have found this site..

http://www.concretespeakers.co.uk/?g...FQxBkgodYhgqdA

steve,
I called up to see john at the slate place a couple of days ago and got a quote for the turntable plinth i am thinking of doing. He seems a nice bloke and definately knows what he is doing. Im going to see him next week to finalise things and order the plinth. Good price too.
Clive