Concrete Audio Speakers...Speaker Enclosures made out of Concrete ?..

Wow,guys here are talking about Bose 901s here...what do they have to do with these speakers  ,other than a different idea.

Why wouldnt concrete enclosures be excellent? 

Because they are not thick enough and they are too resonant. You want something that doesn't ring when you tap it. 

I am not talking about these speakers specifically but rather concrete enclosures in general. Are you suggesting that any thickness of concrete will ring? Hard for me to think of a better, relatively inexpensive material to use in a speaker. I will await your solution and response. 

If it was so good most companies would do it. Those companies that have done it haven’t been successful.

A concrete wall could be used but not a box.

Kenjit

Read what they say about these Betonart Arrivato Concrete speakers
https://translate.google.com/translate?hl=en&sl=de&u=https://www.lowbeats.de/test-betonart-arrivato-standbox-mit-perfektem-gehaeuse/

Match these speakers with the $20K Audio Note 300B Meishu Tonmeister amp and your be in Audio Heaven.......

hdcls
Regarding horns: the room matters. I have had Altec 604Cs for ... 43 years now. They DID sound a little horny (tsk tsk) at first (and I have stayed with these speakers because at my price point, to my ears there is nothing that comes close to their performance), but as the other components improved the condition improved.

I am now in a semi-anechoic room, and the condition has largely disappeared.

In addition to concrete transmission line speakers, Rauna of Sweden also made a small pair of bookshelf monitors with a front bass reflex port - Rauna Tyr II’s. Picture Vandersteens but only 13” tall weighing 30 Lbs each and going down to 40-45 Hz. 

I first heard them in the mid 80’s and was blown away! I found 2 pairs of them in the last couple of years and refinished the rosewood tops & mdf bottoms and they are Excellent & very fun speakers. If you find a pair, most likely the wrap around foam grills have have disintegrated but that can be purchased and make sure you get the Tyr II, not the original Tyrs. The Tyr II’s had binding posts on the back, original Tyrs underneath.

Millercarbon concrete and extruded polystyrene are sometimes mixed together, so you could end up somewhere in the middle sound wise.

Hello highend666.  Granite/Quartz countertops are frequently broken during transportation and installation. Broken bits can be had for very low prices and the shops that have them will cut them for you. I have made seven cabinets out of broken counter tops. You can make the fronts out of any kind of wood product you like, the backs too. Glue the countertop pieces together with construction adhesive or silicone rubber. Heavy, but acoustically inert.

British audio engineer, Gilbert Briggs, who founded Wharfdale in the late 30's wrote a number of interesting books on "loudspeaker" design. He installed speakers into bricked-in corners in a room - must have had a very supportive partner. My takeaway from one of his books was the use of bonded dissimilar materials so that their natural resonances would tend to cancel each other out. Taking his advice, I glued 12" square sheets of mosaic tiles, then grouted them, on the inside surfaces of my cabinets - enjoyed listening to those speakers for 50 years. Probably for the same reason Wharfdale sold loudspeakers with sand-filled voids in their walls in the 50s.

kenjit1,013 posts08-12-2020 10:37am

How will the speaker shaped by kenjit sound?

If I had a speaker company my speakers would have to be perfect. No ringing or resonances. Just pure music.


Me, the dog, the rabbit, and the GOAT, all of our heads, cocked sideways. The chickens didn't though. BOING!

NO RESONANCES, either... hum! At least some ok..
Something gotta come out of the front of the speakers, just saying K!

;-)

Regards

Kenjit is wrong concrete. Does not resonate the issiue is weight and ability to ship without damage


Jim thiel and paul hales had speakers with cconcreate front baffles

Both made great speakers


Just got in cast  ironand graphite speakers from jern they sound unbelievable
http://jernspeakers.com/

0 cabinet resonanance
they sound like 10k speakrs yet cost about 4k

Compleately disssapear speed and articulación are. Off the charts
when used with a good sub willl embarass a lot of extremely expensive speakers

Dave and troy
Audio intellect Nj
Jern dealers

I had some Essence speakers in the 80's.  Each driver, 5 per side, were mounted to concrete, then finished on the outside with medite, then walnut, except the bottom, woofer.  Each speaker housing was separate for time alignment and made a nice pyramid.  10k in '82 was a lot of money, but they sounded fantastic. Before and after speakers were Snell Type A and Quad ESLs.

audiotroy2,546 posts08-16-2020 12:26am

Kenjit is wrong concrete. Does not resonate the issiue is weight and ability to ship without damage

<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>

My oh my, I don’t think he is, but I do think you are... CONCRETE is REAL bad.... GROUT mixes on the other hand.. quit good.. Concrete is WAY to heavy because of the rock type and size. Grout on the other hand, less than half the weight (depending on the fluff) and can have a very DEAD signature..

Again NO ONE uses, granite. You cannot use granite. They use synthetic granite, ATH @ Corian... Granite, basite, any igneous rock will ring... It has a very low concentration of silica. The baffle mix has to have a high porosity (bubbles in the mix, but no voids) Igneous rock, is a NO NO..

Some naturally occurring sedimentary, looks good and can work, but has no strength..

Metamorphic, changes under great heat, pressure and TIME. It’s out...
just like Igneous, way to dence, very difficult to work with, without some pretty fancy tools.. The weight, out of sight!! the heaviest of all, ay?

Try cutting 3-20 driver holes, praying the whole time, hole # 10 won’t have a problem, much less # 20..
Now lets add an OOPS or two in the mix... :-)

Regards

I would think concrete could work....there are so many thickness you could work with. Thicker for the woofer. There is light weight concrete and you could texture the inside with ie. polystyrene or some media to make it more textured. ...the problem is how the hell are you going to test them....to much work in my view. 

Uh boy. All of these box enclosures. If you love listening to box speakers it’s just another box speaker. I use dipole electrostats. I couldn’t be happier. 

I was an electrostat listener for over 20 years, from Acoustat Xs, 2+2s, Martin Logan Monolith IIIs (and reQuest for 2nd system).  Then I met my wife 23 years ago and she found them unlistenable.  She said they lack dynamics, bass and more than one listener ability.  She was right.  I went to big dynamic box speakers which had all of those factors.  The best speakers I've ever heard or wanted are large dynamic box speakers (except for maybe the big SoundLabs).  I should have kept the 2+2s for my second system.  Can I suppose that your listening to electrostats is for yourself primarily and not for a group of people?   Sanders stats are particularly one person speakers, like giant headphones.   

oldhvymec,
There are at least 3 companies that have used granite for speaker enclosures that I can think of, so there are probably more.

roxy543,400 posts08-29-2020 5:53amoldhvymec,
There are at least 3 companies that have used granite for speaker enclosures that I can think of, so there are probably more.

I know, that's what they say, and it may be true. But roxy54 check it out
Granite rings like a bell, ATH @ Corian is what every expensive countertop, speaker baffle and TT plinth are made of. You can even glue and repair the stuff. NOT granite. Granite is pretty cheap in comparison.

Really it's hard to work with, HEAVY, and just a horrible sonic signature.

Regards

All New Ykma Design 0c1 3D Concrete speakers 
 
 https://ykma.design/