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Speaker baffle mods

Posted by unclestu (D) on April 22, 2014 at 20:35:11

photo of a Harbeth C7LE2 modified. I use simple putty so everything is reversible and can be further modified to taste.

Teardrop shaped putty oriented top and bottom split the ir flow off the drivers giving better stereo separation. Vertical dispersion suffers a bit but left right separation increases significantly from such a simple tweak.

The angled putty strip, very small diameter, throws sounds upwards to give higher image height when angled inboard ( speakers need to have mirror symmetry).

You can also see tiny strips of regular scotch tape on the actual woofer cone itself. This breaks up the cone into left right symmetry in terms of eigenemodes, which again increases the left right separation.

On certain very lightweight speakers , say Lowthers, the tape has to be extremely small as the tiniest amount of mass increase seems to to slow th drivers down. When I get around to refoaming my DX-4's I will orient the seam vertically in respect to the frame.

A little putty on the dust cap reshapes the air flow coming off the woofer cone. I use a modified screwdriver shape to throw the air left and right.

Tweeter has a small plastic dot inserted behind the mesh to dampen the aluminum dome. A little reshaping creates a slightly more aerodynamic air flow past the mesh. You hear it as slight increase in upper frequency dynamics and detail. Ideas shamelessly stolen from that tweeter with the cone protruding from the tweeter ( you know which one I mean)
I use black automotive putty but you can use play dough, blue tac and any thing similar.

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