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In Reply to: RE: boomy speakers, old wood flooring : answer ? posted by blinx7 on July 20, 2014 at 11:47:56
Can you give more information about the speakers? Googling gives a LOT of different possibilities. Pictures would be nice!
Definitely try to move the speakers about and try to get uneven distances to the various walls. I second the sand box possibility.
I totally transformed an old set of boomy speakers by applying internal bracing, internal coating, and stuffing…but I don't know what yours have inside.
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As below, Trusonic JR200M is the model, a pretty standard looking 12"-woofer 3 way from the seventies.
Interiors are an interesting proposition, since the drivers were sort of cemented in place by a kind of black hard-plaster material. As the baffles are composed of thick chipboard, I can very well visualize "liberating" variably-sized chunks of baffle as the attempt is made to pry the drivers out. Cabinet backs are sealed.
Visible in the port is wadded acoustic damping material, looking like fiberglas, and a lot of it.
compressing a piece of a cheap car wash sponge and placing it in the port (being careful not to push the original filling back).
The Trusonic speakers I saw in the 70's had thick fancy foam grills (like the ones on JBL L-100's), which may have further damped the ports.
I'll give that a try.
Although, I'm not trying for less bass or less low bass, I'm trying for less boom. But every tool is definitely worth trying.And yes, at one time these had those weird, extruded foam grilles; in lurid colors, too.
I always remind myself about that as regards dispersion and treble response-- those things must have shaved a lot off the presence end of things.But that was before my time, and thankfully they went away and the grille frames are still here.
Covered in simple, black, speaker cloth. Black --it's the new lurid.
Thanks.
Edits: 07/21/14
accessory for many speakers (to allow close to the front/speaker wall placement with reduced BASS BOOM).
I gather (from your comment about the VIVID foam grills) that your living/listening room does not have shag carpeting (the Royal Blue grills were @ one time all-the-rave with Green shag;-).
Too bad about the captive cab backs, and speaker gunk, as adding a little bit of fiberglass filling (or whatever is a suitable sub for such now) would probably help remedy the BOOM.
As an experiment only (if you don't have a cheap/foam type sponge on hand you could try placing a piece of duct tape (or similar strong tape) over a portion of the ports to see if the added resistance helps @ all.
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