2. speakers
  3. 181651-179166

How properly covered internal sides of enclosures for speakers with a passive radiator?

My question to people who  have  practical experience to build a sealed (closed) cabinets for speakers with passive radiator?
I have experience to build speakers with ported cabinets, but now I've decided to build a three-way sealed cabinet using one woofer in the middle of the front panel and one passive  radiator below the woofer.  When I built the cabinets with ports, to minimize reflection and etc, I put felt material on all  interior panels : left, right, rear, bottom and top panels (except the front panel). I know, passive radiator works using air pressure from woofer. 

lysha
spatialking's avatar
spatialking
610 posts
 

All the passive radiators I have seen use acoustic stuffing material in the the cabinet and/or transmission line.   Just because you have a passive radiator, it doesn't change the need for damping cabinet resonances.   You can use fiberglass insulation, its cheap!, but the dedicated acoustic stuffing material is better and you don't have the working with fiberglass problems.  I use it in all the speakers I have built.

invalid
1,190 posts
 

Speakers with passive radiators are more complicated to design than ported speakers. Polyfill is used in some designs, not fiberglass insulation, the polyfill is used not for dampening but to make the cabinet seem bigger than it really is. Sometimes weights are used on the passive radiator also.

fuzztone's avatar
fuzztone
5,607 posts
 

Polyfill stuffing for stuffed toys.

VMPS subs with passive radiators were empty..

More to discover