Hi all,
At the risk of hijacking other threads I have started a new thread just o deal with the issue of how best to build a "dead" box givne the tools available to a DIY.
the box in question is a 48", 16" deep with a 10" wide baffle and 3" wide at the rear. The side panels are to be curved like Wilson Benesch's Act 2 and Sonus Faber's Amati - see links below
http://www.hifi-notes.com/sonusfaberamatifabrikage-nl.htm
http://www.wilson-benesch.com/acttwols.htm
for my cabinets (with curved sides) I was thinking of using lead sheet between 4 mm sheets of MDF. Andy suggested I should loose the lead. someone else suggested using fiberglass to build the box instead of MDF.
The fiberglass I know is either available in sheets (matting) or loose (roving). Fiberglass is then bonded together using resin. Mating has more directional strength than roving and is easier to apply and use so for all practical purposes I am thinking of using mating.
The "sandwich" then would be a three material sandwich of MDF lead and fiberglass.
1. why should I loose the lead? I know it is soft and offers not rigidity whatsoever but it is heavy and can be an excelent damper.
2. If I use fiberglass should I put it on the outside (it is known to be carcenogenic)? Should I out it between sheets of MDF?
3. The inside of the cabinet will be damped using one or a combination of 3 materials - egg crate foam, polyfil, and glass wool. What do you guys recomend? I am thinking if applying 2" sheet of egg crate foam to the walls and then filling the rest of the cabinet with glass wool.
Thanks in advance. And Andy thanks for everything. Where do you and guys like Dave find the time?
Regards
Navin
At the risk of hijacking other threads I have started a new thread just o deal with the issue of how best to build a "dead" box givne the tools available to a DIY.
the box in question is a 48", 16" deep with a 10" wide baffle and 3" wide at the rear. The side panels are to be curved like Wilson Benesch's Act 2 and Sonus Faber's Amati - see links below
http://www.hifi-notes.com/sonusfaberamatifabrikage-nl.htm
http://www.wilson-benesch.com/acttwols.htm
for my cabinets (with curved sides) I was thinking of using lead sheet between 4 mm sheets of MDF. Andy suggested I should loose the lead. someone else suggested using fiberglass to build the box instead of MDF.
The fiberglass I know is either available in sheets (matting) or loose (roving). Fiberglass is then bonded together using resin. Mating has more directional strength than roving and is easier to apply and use so for all practical purposes I am thinking of using mating.
The "sandwich" then would be a three material sandwich of MDF lead and fiberglass.
1. why should I loose the lead? I know it is soft and offers not rigidity whatsoever but it is heavy and can be an excelent damper.
2. If I use fiberglass should I put it on the outside (it is known to be carcenogenic)? Should I out it between sheets of MDF?
3. The inside of the cabinet will be damped using one or a combination of 3 materials - egg crate foam, polyfil, and glass wool. What do you guys recomend? I am thinking if applying 2" sheet of egg crate foam to the walls and then filling the rest of the cabinet with glass wool.
Thanks in advance. And Andy thanks for everything. Where do you and guys like Dave find the time?
Regards
Navin