Lining A Speaker Cabinet And Other Improvements

[ddpaulbell]

I have an eighties Carvin B215M. It has later model Carvin HE15's. It is very punchy and tight with only a Peavey Century 200 head. I get bad distortion if I turn the bass past 12:00. I keep the Middle at maximum. I really dig the sound. It has only a thin piece of fiberglass insulation on the bottom half of the back. What benefit would I gain if I lined all but the baffle? Any other improvements I might make?

[dhsierra1]

lining all the walls but not the baffle is de rigeur for cabinets, helps attenuate standing waves and thus help focus the sound better. A lot of folks here on TB like the waffled foam bed liners about 1.5-2" thick you can get at a bunch of different places cheaply and easily.

[ddpaulbell]

Originally Posted by dhsierra1

lining all the walls but not the baffle is de rigeur for cabinets, helps attenuate standing waves and thus help focus the sound better. A lot of folks here on TB like the waffled foam bed liners about 1.5-2" thick you can get at a bunch of different places cheaply and easily.

I'm wondering how it will sound. It is not boomy at all now. I wonder if frequencies bouncing around inside can cancel out others.

[dhsierra1]

you'll generally notice an improvement. It's an easy and cheap experiment to try, and if you don't like it or notice a difference you can always remove it. But in this day and age I don't know of any reputably built cabinet w/o it.


Check some of the stickies in the AMPS section, no doubt there's some threads in there about the benefits of stuffing/lining cabinets.

[billfitzmaurice]

Originally Posted by ddpaulbell

I wonder if frequencies bouncing around inside can cancel out others.

That's exactly what happens.

[ddpaulbell]

Originally Posted by billfitzmaurice

That's exactly what happens.

Thank you. As soon as I can I will line it. Not sure which to use: fiberglass insulation, egg crate mattress topper, or poly fill.