2 cu.ft. box for 2 subs (sealed) insulation?

[stevo1988 10+ year member]

the box is kinda cheap but works, 5/8" MDF 2 cu.ft. INTERNAL dimension sealed for 2 Kenwood 12" subs...what should i do for insulation?

Click to read more...

 

[stevo1988 10+ year member]

a little too much information umm...can someone explain to me what insulation does (to affect sound quality) and why anyone needs it?

i understand that it "tricks" a speaker into thinking the enclosure is larger because the sound waves have to travel further to reach the sides of the box and so on but how does it affect SQ and how do you determine whether you need it or not?

 

[Immacomputer 10+ year member]

It more so changes the alignment of the enclosure and smooths out the frequency response. It can also help break up standing waves from upper order harmonics which can help with sound quality.

If you want to know if it helps, **** what people say. Just go buy a bag for like $3 and experiment with it. If you like it, great! If not, take it out. Either way, you're happy -- **** what we say. Also try stuffing more and less in the enclosure and listen for differences.

 

[stevo1988 10+ year member]

i did experiment with my old Type-E and i noticed it made it a little quieter

 

[Immacomputer 10+ year member]

It won't ever make it louder. Unless you WAY over stuff it and even then, I don't think there would be too much of a gain in output.

 

[stevo1988 10+ year member]

but if you had a box that was too big for your speaker specifications, one wouldnt need to insulate, correct?

 

[Immacomputer 10+ year member]

No, that is not correct. It's not for enclosure volume adjustment but for changing the Q of the system.

Making a sealed enclosure larger just lowers the Q value to where it approaches the Qts of the driver. There really is no such thing as "too big" of a sealed enclosure. It may not fit your power application or your desired sound but it's ok to do so.

Like I said before, it changes the alignment and it can help break up standing waves from higher order harmonics.