Damping Material for Subwoofer

[TwoTwo]

Just got my replacement amp for the UFW-10. When I opened the sub to replace the amp, the inside cabinet was not lined. I'm not too familiar with the rest of the UFW-10 or ULW-10 but the unit reviewed here http://www.audioholics.com/reviews/s...-ufw-10/page-1 mentioned that the inside was lined with a 1/4" felt batting. Instead, my unit came with polyfill. Is the polyfill a comparable replacement for the 1/4" felt? The reviewer didn't even think the sub needs insulation. :no clue:

Is it worth getting better damping material such as the BH5 for the UFW-10? All the MDF except the front baffle (0.9") is 0.7" thick. Since this is a smaller unit compared to the UFW-12 would the No Rez work as well?

I have not connected the latest amp to test its performance. It appears to be a modified Dayton SA240 amp (http://www.parts-express.com/pdf/300-804m.pdf). The replacement amp is rated 400W as opposed to the 650W that it's replacing. The original design was rated 500W. I'm not sure how the sub will perform with this latest amp, or if the BH5/No Rez is worth the investment given the sub's configuration and components.

[corndog71]

I would recommend No Rez. In the half-dozen speakers I've put no rez in they all sounded better afterwards.

Also the polyfill should be fine.

[lngbruno]

No Rez is okay, but BH5 is better. I have used it in two subs and it works wonderfully. As always, YMMV.

Lou

[rsa]

Here's the reason for the polyfill. It's not for damping the cabinet.

No-Rez vs. Blackhole 5: http://www.skiingninja.com/Articles.asp?ID=157

You could do most, if not all, of the UFW-10 cabinet with one 24" x 27" sheet of Blackhole 5. Try Sean at skiingninja.com?

Sandbagger brought up that the UFW's have a double layer of MDF on the tops and bottoms, which might make Blackhole 5 less needed on those surfaces.

Your UFW-10's small dimensions should make for a stiffer cabinet than something with larger dimensions, i. e., you've got a head start to a stiff cabinet.

If you're going to keep the UFW-10, I say get the Blackhole 5. :thumbsup:

[TwoTwo]

Thanks for all the input. Interesting article on the polyfill. I would think it's still ok to still use the polyfill and either the BH5 or No Rez.
I might ask the ninja what his thoughts are on damping the UFW-10.

[PhenomeNhan]

I think this question was brought up before on another forum. BH is srecommended for subwoofers and NoRez is for speakers. I have a bunch of polyfill left if you need some.

[TwoTwo]

I think this question was brought up before on another forum. BH is srecommended for subwoofers and NoRez is for speakers. I have a bunch of polyfill left if you need some.

Yup. I saw the discussions there and here for the UFW-12 upgrade in particular. Not so much on the UFW-10, though it probably still apply. I'll have to see if it's worth getting it damp considering what I paid for the sub and the track record of the various amps. As far as the polyfill, I think I'm covered. Thanks for the offer.