Damping/Stuffing Comp. Chamber on BLH (Off Topic)

by Bert , Tuesday, June 13, 2006, 23:10 (6526 days ago) @ BobW

Hi Bob,

What is the general feeling about damping or stuffing the chamber behind the driver in Back Loaded designs?

A good design does not need damping material. Damping is needed in some combinations but usually you do not only damp away problems but also some of the nice things a horn provides.

Most important is to reduce the reflections from the wall behind the driver. Usually this should be done with angled panels but diffraction helps too.

Either way, when the back wall is close to the driver then the energy needs to be dampened. Felt usually works rather well but too much applied to the back wall also takes away life...

The only advice I can give is to play with the damping. Start empty, add some pieces of felt (10-20mm thick) to the back wall and listen. If it turns out that you need to reduce too much hollowness after then you could add some damping material in the space below the driver (never directly behind it!) and listen again.

Ciao,

Bert

--
BD-Design - Only the Best!

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