sealed box- separate chambers or common?
07-29-2010, 09:37 PM
#1
sealed box- separate chambers or common?
hey guys, I have this box in build... now is it better to separate chambers or make one common chamber? .... im leaning towards separate as it will provide extra support, but i never had a common chamber box... what are your experience with this?
07-29-2010, 09:56 PM
#2
both will work the same, both have pros and cons; the separate chambers allows you to have proper sound even if one sub isn't working, allows you to easily diagnose sub problems (hard to tell if a sub is working when both are moving), and as you stated offers extra bracing. The cons; more wood=heavier(though not very much), more work involved to build, and internal volume is used up (albeit very little overall). Personally, I like separate chambers, but it's not necessary for good sound.
07-29-2010, 10:04 PM
#3
both will work the same, both have pros and cons; the separate chambers allows you to have proper sound even if one sub isn't working, allows you to easily diagnose sub problems (hard to tell if a sub is working when both are moving), and as you stated offers extra bracing. The cons; more wood=heavier(though not very much), more work involved to build, and internal volume is used up (albeit very little overall). Personally, I like separate chambers, but it's not necessary for good sound.
07-29-2010, 10:20 PM
#4
Two SW8200's on 500W? That's some maaaddd flexin' BOIIIII!
Use a common chamber if you don't plan on blowing one up and testing to see which one it is.
I reckon common has increased cone control below the FC, it'll make the subs a little more efficient, and it'll be X2 more violent inside the box. I have no idea if that's an audible gain.
If the cancellation waves start closer to eachother than it minimizes the losses outside the box... or so I think lol.
If one coil is much more worn than the other, or if you're using two amps with one is phased a bit, than you'll see differing excursions. Not a problem as the subs support eachother more than anything.
Use a common chamber if you don't plan on blowing one up and testing to see which one it is.
I reckon common has increased cone control below the FC, it'll make the subs a little more efficient, and it'll be X2 more violent inside the box. I have no idea if that's an audible gain.
If the cancellation waves start closer to eachother than it minimizes the losses outside the box... or so I think lol.
If one coil is much more worn than the other, or if you're using two amps with one is phased a bit, than you'll see differing excursions. Not a problem as the subs support eachother more than anything.
Last edited by Lord Huggington; 07-29-2010 at 10:40 PM.
07-29-2010, 11:36 PM
#5
Two SW8200's on 500W? That's some maaaddd flexin' BOIIIII!
Use a common chamber if you don't plan on blowing one up and testing to see which one it is.
I reckon common has increased cone control below the FC, it'll make the subs a little more efficient, and it'll be X2 more violent inside the box. I have no idea if that's an audible gain.
If the cancellation waves start closer to eachother than it minimizes the losses outside the box... or so I think lol.
If one coil is much more worn than the other, or if you're using two amps with one is phased a bit, than you'll see differing excursions. Not a problem as the subs support eachother more than anything.
Use a common chamber if you don't plan on blowing one up and testing to see which one it is.
I reckon common has increased cone control below the FC, it'll make the subs a little more efficient, and it'll be X2 more violent inside the box. I have no idea if that's an audible gain.
If the cancellation waves start closer to eachother than it minimizes the losses outside the box... or so I think lol.
If one coil is much more worn than the other, or if you're using two amps with one is phased a bit, than you'll see differing excursions. Not a problem as the subs support eachother more than anything.
I will try common chamber then... I will need some solid bracing here.. here is how it looks so far:
Notes: the curvatures were done roughly on the bend saw and i will make them nice on the weekend with router... and the back piece is too long so i can trim it so it fits perfectly tomoro... or make a slot in the top piece (not decided yet).. the gaps on sides will be filled with fiberglass...
P.s - bracing- do you think aluminum rods with threaded holes for screws will do the trick? im thinking at least one in the middle (not sure what to do on the sides and the back- maybe I will do what i did to the last box:
what do you think? -thanks for all your input
07-30-2010, 10:51 AM
#9
Im thinking the amount of work for a rod is way less then wood, plus is lighter- im just not sure what to put on walls- i will try the wood, but i don't see how it can work (bracing in this case if for quality -its SQ setup), im also considering putting bushings all around the box- like suspending it on bushings)
08-15-2010, 02:11 PM
#10
hey guys- i have been busy so the work was pushed a bit- now i went with bracing made out of my old test box---
and i have a question about a lil brace i want to put right here:
will it affect the magnetic field flux? i know for high precision equipment that is unacceptable but will that metal piece affect the distribution and put the force that drives the cone offset and possibly damage the woofer? (i'm probably over thinking this a bit and over estimating the woofer design but doesn't hurt to ask)
and i have a question about a lil brace i want to put right here:
will it affect the magnetic field flux? i know for high precision equipment that is unacceptable but will that metal piece affect the distribution and put the force that drives the cone offset and possibly damage the woofer? (i'm probably over thinking this a bit and over estimating the woofer design but doesn't hurt to ask)
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