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In Reply to: RE: Long-established, engineering-based manufacturer vs. small hobbyist-gone-to-the-dark-side upstart posted by Brian H P on December 08, 2020 at 13:31:08
Just a spitball here......I have NOT heard the Acoura speakers.
But it occurs that a company without access to some very Expensive items, like an Anachoic chamber or who knows what else, may USE a review to gain knowledge of their product. Stereophile has both a large background in speaker measurement but also keeps their equipment used fairly current....
Treat the review as a 'reality check'.
I'd expect a 'Mark II' version of the Acora with some substantial modifications. Maybe fix that crossover? Reduce that 900hz peak, maybe?
It would appear they have some fundamentals 'right' but maybe need some voicing help as well as maybe some crossover assistance, too?
Too much is never enough
Follow Ups:
Superb drivers and beautifully made enclosures. Need some work on the crossovers (it certainly shouldn't be hard to wrangle a more acceptable response from ScanSpeak drivers!) and probably some lining/stuffing to reduce internal reflections.
They would still be a limited-availability specialty product from a small manufacturer, built with expensive materials and methods, and therefore necessarily costly, but with a less "eccentric" frequency balance could perhaps have wider appeal among well-heeled audiophiles.
Anyway, congrats to the designer for the heroic enclosures. I do wish him success, as the stone cabinet approach has much validity.
Hi Brian and Picture Guy,
I finally read the article on the Acora Acoustic SRB by Julie Mullins.She does a great job but I would like to add some stuff.Julie says that granite is well damped.I worked with granite for 4 years.Some as a tombstone installer and then making and installing golf course hole markers.I've been in many family vaults made out of granite.The sound is not damped in there,it bounces.I don't know what Acora uses for internal dampening but it's got to be good and alot.
The different sides and top and bottom with the enclosure might have individual resonances.Acora said they are joined with an epoxy.Epoxy hardens like a rock.When we would attach a granite headstone to a granite base,the part lying on the ground,granite too, we would use a non hardening but brutally strong stuff called Stone Set.It was just like modeling clay.My job was to roll up ropes of it to make a gasket (air tight) around the base onto which the headstone gets placed on.I had to break a gasket of a 90 year old stone and it was still pliable to my putty knife.That stuff was dampening, I can't see hardened epoxy as a good connector of granite parts.This may have added to the camel humps in the response as much as the blamed crossover.Just an idea...
Granite warps? thats a new one on me.
Black granite from Africa? Maybe thats why the high price of the Acora.The best and cheaper granite if not from Canada comes out of a town called Barre Vermont and other places in N.H.There are all sorts of different choices in the appearance of color in granite.It comes in any color as long as it's black.I know you were joking but that did die out with the model T and Henry Ford over 100 years ago.
I found Julie's description about different sounds she observed from different groups outstanding but I got the impression she wasn't going to sell the house to get a pair.
These are just some ideas from an old Granite Grunt who likes Dynaco speakers....thanks for listening....Mark Korda
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