View Full Version : Sound treatment for speakers in cabinet?


lovingdvd
01-26-07, 03:53 PM
My front speakers are within their own "cabinets" which is part of a wall unit. I've recently got into equalizing my sub due to issues with bass and taking measurements, and it seems that having these speakers inside of cabinets is amplyfing the bass and low frequencies.

I do not have any other place for the speakers. So as I see it I can try to treat the inside of the cabinet to reduce as much of the "cabinet-effect" as possible, or perhaps buy new speakers designed to be used in cabinets.

My fronts are Pinnacle Classic Gold Reference speakers. They are towers with a size of 8 3/8" Wide x 33" High x 13 1/4" Deep. Each is within an enclosed cabinet that has GOM fabric in the front. The cabinet is not much larger than the size of the speakers (cabinets are part of the wall unit these speakers sit in).

In particular I'd say that within the cabinet there is about 5-6" of space to the left/right of the speaker, about 6" of space behind the speaker, and about 8" or so above the speaker.

Can someone suggestion the type of material and ways I can insulate or treat the inside of these speaker cabinets with? How much do you think this would help?

Also in case that doesn't work out - can anyone recommend some good front/center/right speakers that are specifically designed to work well inside of cabinets? Thanks!

Drew Eckhardt
01-26-07, 04:51 PM
My front speakers are within their own "cabinets" which is part of a wall unit. I've recently got into equalizing my sub due to issues with bass and taking measurements, and it seems that having these speakers inside of cabinets is amplyfing the bass and low frequencies.


Having them close (as in within feet) to a wall gets you that effect.


I do not have any other place for the speakers. So as I see it I can try to treat the inside of the cabinet to reduce as much of the "cabinet-effect" as possible, or perhaps buy new speakers designed to be used in cabinets.


You don't have enough space to absorb the low frequencies, although you can deal with the problem electronically using shelving high-pass filters either in the form of a parametric equalizer or receiver/preamp which has this functionality.

Some will even calibrate themselves automatically.

jhnmdahl
01-28-07, 04:08 PM
You can fill the cabinet with anything acoustically absorptive, such as acoustic foam or rigid fiberglass panels, but fiberglass is itchy and acoustic foam isn't cheap. One of the best ideas I've seen is to fill the rest of the face of the cabinet with pieces of Bild-rite fiberboard broken or cut into pieces. It's normally used as house sheathing under siding, but is cheap and works well, and you can get it at Home Depot or Lowe's in large sheets.

Good luck,

John

ddingle
01-28-07, 04:29 PM
We use fiber-fill from a fabric store. Not itchy and works well. Pillow stuffing is it's usual use.

lovingdvd
01-28-07, 06:44 PM
Having them close (as in within feet) to a wall gets you that effect.



You don't have enough space to absorb the low frequencies, although you can deal with the problem electronically using shelving high-pass filters either in the form of a parametric equalizer or receiver/preamp which has this functionality.

Some will even calibrate themselves automatically.

Thanks. I've been looking for a good external parametric equalizers. Can anyone recommend one?

lovingdvd
01-28-07, 06:45 PM
You can fill the cabinet with anything acoustically absorptive, such as acoustic foam or rigid fiberglass panels, but fiberglass is itchy and acoustic foam isn't cheap. One of the best ideas I've seen is to fill the rest of the face of the cabinet with pieces of Bild-rite fiberboard broken or cut into pieces. It's normally used as house sheathing under siding, but is cheap and works well, and you can get it at Home Depot or Lowe's in large sheets.

Good luck,

John

Thanks. But should I even bother (will there be any benefit)? According to Drew above probably not?

droht
01-30-07, 10:51 AM
For speakers that address this directly check out nhthifi.com "in furniture" options. I think Triad also has a similar offering.