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My 2 way DIY granite speakers;
Granite 2cm thick walls
140 lbs, 34 lts each one
22" woofer
Soft dome Tweteer
Silver cable welds,
And yes the sound fabulous...
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of factors that make speaker systems sound good.
You have a very sexy pair of speakers there, but unless you have dealt competently with the excessive cone break-up of the SEAS woofers and midrange distortion of the tweeters, they probably don't sound as good as they could. Crossover design for these problematic drivers is critical; enclosure material is not.
Congratulations on your build. How did you cut the granite and join the pieces? How are the drivers attached? What type of damping lines the enclosure?
Peace,
Tom E
...would disagree with you on that.
The universe is made of electrons, protons, neutrons, and morons.
Any competent speaker manufacturer, no matter how expensive or exotic their product, would agree that the crossover is more important to the execution of an excellent speaker design than what the enclosure is made of. I did not write that material is not important, but the crossover is certainly more important, especially with tricky drivers.
I have taken great pains with the enclosure material of my own speakers, but I know that without a decent crossover, they would sound like shit. Believe me, I've heard it and despaired because of it.
The positive or negative contribution of exotic enclosure material, compared to that of the crossover, is minor. It can certainly add to or detract from a speaker's accuracy, but it's secondary at best. Get the crossover right, then advance to fancy composites and structural complexities to achieve an inert enclosure. Wilson, Magico, and every other decent speaker company on Earth would agree with that.
Please don't mislead people here that a pretty box is more important than what's inside it and how those innards work together.
Peace,
Tom E
Well of course the crossover is important. Arguably THE most important component of the loudspeaker. After all, the best drivers with a crappy crossover will not likely sound better than average drivers with a well-designed crossover. At the same time, an enclosure with all kinds of resonances can undo much of what a well-designed crossover and high quality drivers can accomplish. Michael Green's "tunable" enclosures not withstanding, most manufacturer's go to great lengths to make cabinets as inert as possible.The three primary legs of any speaker design, good drivers, a well-designed crossover, and a cabinet that compliments the first two, have to work together. Dropping the ball in one area can severely compromise the other two.
The universe is made of electrons, protons, neutrons, and morons.
Edits: 01/28/16
I totaly agree with you and i would add to that equation excelent quality crossover components ( caps ( mine were Mundorf Supreme), resistors, air core), silver welds, internal silver cables and good connectors.
When i bought these speakers they were 3 way and come with Visaton tweeter and woofers.
The sound was desiquilibrated ( The medium woofer played too low and the tweeter to loud) and without any spaciality. Very "front" sound altough very clear ( granite box effect maybe ? ). i did not like that sound so i upgraded all that could be upgraded.
New tweeters and woofers, new crossover with top quality parts, silver welds, internal silver cables, connectores, syntethic and natural wool inside the walls.
i think the box is important but only if you get the correct crossover and woofers and tweeters. Then you can see how with the right no ressonance box your set of speakers can really shine.
Also in my case i can tell you that these granite speakers had good WAF ( Wife aceptance factor)
I like the way you took those existing speakers and made something better with the exotic enclosures. The Seas are probably better drivers, although perhaps not the best choice for a two-way system in a smallish granite enclosure, and you addressed all the other issues properly.
Always nice to have the wife approve. They do look really cool. Glad you like the sound.
Peace,
Tom E
Like someone wise once said ;
"I, or anyone else, can make amplifiers, speakers, and cables that sound as good as or better than most of what can be bought for ten times the money."
Thats the case here !
Very nicely quoted. I didn't think anyone would ever actually read that. I'm glad you took it to heart, and that you were successful.
Peace,
Tom E
I dont think they read the Audioasylum posts.
Maybe when they were starting their bussines...
Before the upgrade of the woofers, tweeter and crossover.
Actualy they were originaly a 3 way speaker...
I used the Seas Trym crossover schematics.http://www.seas.no/index.php?option=com_content&view=article&id=384:trym-seas-diy-kits&catid=66:seas-diy-kits&Itemid=365
http://www.seas.no/images/stories/diykits/pdfdataheet/filter_trym.pdf
No problem here. I think...The drivers are screwed to the granite speaker.
See also my previous post on cuting and join the pieces and internal damping.
Edits: 01/27/16
They look great. A lot of work went into these. The drivers are super too, particularly if you handle the ringing on the top end of the Excel woofers.
How did you work the granite, or did you have someone else do that? What holds them together?
Edits: 01/25/16
i bought the granite speakers already as they are and changed the woofers, tweteer and the crossovers.
The sides of the granite plates are cut at 45 degrees and glued together with natural resin. This way, the speaker box looks like it is one piece of granite.
Also i know from the original producer that they had a bituminous treatment of which then takes a bituminous higher density membrane to control the natural characteristic of stiff stones. The internal damping is done with synthetic wool on the walls of the housing and natural wool on the back of the subwoofer. The box has a blocking brace in the central area of the panels, also in stone.
The producer of these high density granite speakers did not made more because they were very expensive to make.
but i can tell you that they are completaly without any ressonance compared with the normal wood / mdf box speakers.
The sound is very detailed and the bass is deep and acurated.
The speakers "sound" like they were much bigger.
I also made an high investiment in the crossover materials, specialy the capacitors that are top of the range of a well know brand.
the woofer and the tweeter are also toprange of SEAS EXCEL
Looks more like a 7" to me.
The universe is made of electrons, protons, neutrons, and morons.
22 cm... 8"
Edits: 01/24/16
Another picture
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