PDA

View Full Version : Plexi???



nick3470
12-26-2002, 12:14 AM
if i wanted to make one side of my box plexi for sub view how thick should it be???

is this recommended or will it ruin the sound?

80_Cutlass_mn
12-26-2002, 12:20 AM
It would be awesome to have a plexi panel on ur sub box but that would be too expensive for me.:( But oh well:)

evo2k3
12-26-2002, 12:16 PM
generally i would agree with Jmac...but if your running low power 10's or 8's you can get away with something as small as 1/2". i ran that on my w7 and it cracked in half. The other thing to consider is how large the span is......if the side is 20 inches wide you need to use thicker material (assuming you dont want to brace against the plexiglass).

terifi
01-01-2003, 09:17 PM
also i have not yet tested, POLYCARBONATE, it is clear, and states it is 250x stronger than plexiglass/ acrylic
a little more expensive, but able to get away with thinner width, i am currently buyin parts for my box, and have chosen to use polycarbonate, although it has not yet come in yet.

the reason you do not want thin plexiglass is b/c it will flex, and that somehow screws stuff up :)

evo2k3
01-02-2003, 12:09 AM
Originally posted by terifi
also i have not yet tested, POLYCARBONATE, it is clear, and states it is 250x stronger than plexiglass/ acrylic
a little more expensive, but able to get away with thinner width, i am currently buyin parts for my box, and have chosen to use polycarbonate, although it has not yet come in yet.

the reason you do not want thin plexiglass is b/c it will flex, and that somehow screws stuff up :)

the somehow is the same somehow tells us we need to seal boxes.....the volume of the box changes...and low frequencies get poor response in free air spaces "infinite baffle".....where can you get the polycarbonate from? i and very intrested in it.

terifi
01-02-2003, 09:44 AM
I found this guy on ebay selling pieces, but if you e-mail him with a request, i am sure he will give you an offer that in my case was an excellent one
for polycarbonate, email- Howard Everton [[email protected]]

evo2k3
01-02-2003, 12:59 PM
Originally posted by Jmac
Low frequencies get poor response in infinite baffle since when ?

im not talking about the subs that are ment to preform in an infinite baffle....but more along the reasoning that tweaters and mid-range speakers are often not in sealed enclosures, those frequcy ranges respond better in open air than a 3x hz tuned sub does.

nick3470
01-03-2003, 04:31 PM
what is an infinate baffle sub????

Matador
01-04-2003, 02:03 AM
would the plexiglass affect the output? will it affect teh resonant frequency?

also, let's say it's longer than 20'', more close to ~30'' for a dual sub box. is it better to run one long pleiglass, or 2 use two pieces , which would be "connected" in the middle piece that separates teh chambers?

terifi
01-04-2003, 11:33 AM
not speaking from expereience, but just like a long span of 2x4, it is quite weak, compared to two shorter spans,

get, that?

basically b/c theres a longer span of plexi with just one piece, it would weaken the middle of the plexi causing it to bend, go with two pieces....unless you would like to pay a fortune for 1" thick plexi

same problem i ran into, not enough money, a sheet that would cover a span that size, that your gonna cut most of it out for holes isnt worth it, my window was gonna run somewhere around 100, at a platics place where i live, but most of the ones i called, couldnt even sell me a cutom sized piece, i had to order a 4'x8' sheet probably running a few hundred dollars

just my input!

taylor
01-05-2003, 01:29 PM
"what is an infinate baffle sub????"


Free air, your trunk will make the enclosire for you just mount the woofer to a solid front piece.....i my self have never heard an infinite baffle setup that i liked....i am a sealed man....