Replacing sound proofing in cabniets


I have an old set of speakers I am bring back to life. I have replaced many of the drivers. My next step is replacing the thick cloth material inside the cabinets. Must be used for sound proffing, keeping the sound from bouncing about.
Just curious what people use for this. Carpet pad? Any suggestions sure be appreciated!

Thank you.
johnymac
I like the idea of adding Acoustic foam/low density foam.
Can anyone tell me the best place to buy this? My replacement drivers should be on their way soon and am hoping to replace the old material ASAP.

Thanks!!
Agree with above posts, but will add a couple of other suggestions...

You can try to completely stuff the box with foam - the type Sean recommended exactly. While it goes against the conventional wisdom to stuff a ported box, this is what the Fried Line Tunnel or the Von Schweikert Transmission Line(I disagree that it is a TL) do.

Or, you can use polyester batting, loosely filling up the box.

Both of these things can relieve a speaker of its boxiness in many, many instances, turning wheezing bass into more natural sound. As in all cases, experimentation is needed to see if it works for you and/or your speakers.
www.partsexpress.com

I bought some acoustic fill from them. They have a few selections including eggcrate foam, stuffing, and dampening sheets.
As Barry aka "Bright Star Audio" mentioned, i typically do not advocate stuffing the port in any way, shape or form. That is, unless one is "experimenting" and does so in a fashion that is easily reversed.

Having said that, most mass produced and even many "audiophle approved" and "hand built" vented designs will benefit from what i've mentioned. As mentioned in another thread, i just got done doing this to a pair of speakers that currently retail for over $3K. The results were quite obvious and highly beneficial. For the record, these speakers were HIGHLY under-designed to begin with in almost every aspect. Even though they were poorly designed, lacked proper implimentation of the design, which resulted in them sounding like crap, they get rave reviews all the time. Sean
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Sean, I take it that you are referring to the Legacys you have been working on?

As you know, I am not such a big fan of their speakers. I will say that the Focus and the minimonitor sound the best in the lineup to my ears. Legacy is my biggest disappointment in audio, where the whole definitely does not add up to the sum of its parts. Of couse, I am speaking "on paper", and your recent exercise probably proves that the sum of the parts isn't all that much to begin with.

When I was about 19, I finally had enough money to buy a pair of Legacys, and a used pair popped up in a nearby audio salon. After receiving their catalogs for years, I just "knew" they were the best speaker out there. Especially, at the price point.

I mean, come on, all those woofers are drivers, in a big, beautifully finished, well braced box. The testimonials were jammed with people who had moved to them from all of the respected brands - Thiel, Wilson, Mirage - let's just say that from this and all of the other "wonder products" I have encountered, I have zero faith in testimonials these days.

Fortunately, or unfortunately, I decided to go to the store to listen to my Legacies. It was a foregone conclusion that I would be buying them. The audition was simply a formality. Credit card in hand(if they were at a distant dealer, I would have just had them shipped), I drove on over.

Wow! All I can say is that there is no other product that I have encountered in audio that failed to live up to its hype like these babies. The overwhelming feeling I got was that it was impossible for a speaker this big and bold to come across this small and weak.

I won't go into all of the other details, but in a Legacy show, at the Allen Organ Company, which seems to have bought the line from Bill Duddleston, along with his services, I got the same exact impression.

The VERY valuable lesson I came away with was to NEVER DRINK FROM THE LABEL and NEVER TRUST THE MAGAZINES OVER A REAL, PERSONAL AUDITION!