Is there anything I can do with my speaker box to make more bass and stop the sort of "breathing" sound that the sub makes?
PLEASE HELP!
Replies (9)
swez on 07/17/2004 17:56:47
Am sure there is... say more on the subs you have, the box dimensions and what style of enclosure. Ie Sealed, ported, bandpass or other. This is often called huffing or chuffing.
It sounds like a horribly mismatched sub/enclosure issue. Mayby wrong porting or subs that are not designed for that style of enclosure.
Sub make and model?
Amp make and model?
Type of vehicle?
Swez
guy-finnigan on 07/17/2004 19:02:53
hmm.. maybe it's because i'm using a car sub with an oldschool home sound system pioneer amp. I know it's not right but I don't have a car.. lol and the sub is a Pyramid so it sorta sucks. It's in a home style box with 2 tweeters at the top and the sub below they are used with a crossover. The sub peaks at 700 watts and is 12 inches. The box is 11.75 inches deep, 25 inches long, and 14.75 inches wide.
guy-finnigan on 07/17/2004 19:03:47
I don't really know if that helps cause I don't know much about this sorta stuff but if you can help it would be greatly appreciated.. thanks
swez on 07/17/2004 19:20:36
That's a pretty large box for a 12" sub. Most 12" subs are fine at 1.0 -1.25 cf (internal airspace) Your box is more like 1.75 cf. This makes it sound deep and low I would bet... but very low power handling before the mechanical stabilizers in the sub begin to break up. Go easy on the bass EQ knob!
If this were a ported box, that size is appropriate. A Port design has a hole in it of some diameter (2-4" dia.) and a tube of some length to tune the enclosure. The port can be located on the fron panel, rear panel, side or top. Do you see a port hole here?
In a sealed box, there should be no air leaks. If there are air leaks, we loose back pressure to the sub and the cone can go out of control as well. You can test for air leaks by pressing gently on the cone and se how long it takes to return to at rest position. A few seconds... good sealed enclosure... immediate return to rest position... leaky box.
It should not matter what amp you choose to power this speaker box. A home stereo amp or tuner w/ amps will be OK.. just depends on the sub ohmic load. In car audio, most subs are 4 ohm nominal or lower. In home stereo, most subs are 8 ohms.
Hope that helps,
Swez
guy-finnigan on 07/17/2004 19:27:29
It's a sealed box and the cone came up right away when I pushed down on it. Is there an easy/cheap way of sealing the box?
swez on 07/17/2004 19:47:25
Sure... silicone (RTV) is great! Just pull the sub, take the box outside and run a bead of silicone over each joint ith the box. That includes tweeter holes, wiring into box and you can even seal the woofer in if it does not have a foam surround.
Silicone as it cures, will outgas fumes and can damage foam surrounds. If your sub has a foam surround, let the silicone cure overnight with a fan blowing in it, then remount the sub in the morning. If you dont wish to seal the sub with silicone (have to cut out the bead to remove sub again, can use a cork or neoprene gasket about 1/4 - 3/16" thick. You can buy them or make your own. (very carefully cutting with a sharp razor knife.
Finally, you may want to go to a craft store and buy a few of those foam cell blocks. Can glue these into the box and that will reduce the appearant interior airspace of the box. A few of these with dimensions of 12" long x 4" T x 4" W should help. (4-5 of them will do it)
Swez
PS Sorry you asked? lol
guy-finnigan on 07/17/2004 19:50:59
SWEET!.. lol.. Thanks soo much. You have helped out soo much!
guy-finnigan on 07/17/2004 21:34:16
I put the silicone on all the parts that you said. Should I wait a day before I try the sub out again? Or should I try it out right now?
uochronos on 07/18/2004 02:39:15
do not listen to james leave the sub out while the silacone cures then put it in the next day maybe fan out the box also as swez mentioned
PLEASE HELP!
Replies (9)
swez on 07/17/2004 17:56:47
Am sure there is... say more on the subs you have, the box dimensions and what style of enclosure. Ie Sealed, ported, bandpass or other. This is often called huffing or chuffing.
It sounds like a horribly mismatched sub/enclosure issue. Mayby wrong porting or subs that are not designed for that style of enclosure.
Sub make and model?
Amp make and model?
Type of vehicle?
Swez
guy-finnigan on 07/17/2004 19:02:53
hmm.. maybe it's because i'm using a car sub with an oldschool home sound system pioneer amp. I know it's not right but I don't have a car.. lol and the sub is a Pyramid so it sorta sucks. It's in a home style box with 2 tweeters at the top and the sub below they are used with a crossover. The sub peaks at 700 watts and is 12 inches. The box is 11.75 inches deep, 25 inches long, and 14.75 inches wide.
guy-finnigan on 07/17/2004 19:03:47
I don't really know if that helps cause I don't know much about this sorta stuff but if you can help it would be greatly appreciated.. thanks
swez on 07/17/2004 19:20:36
That's a pretty large box for a 12" sub. Most 12" subs are fine at 1.0 -1.25 cf (internal airspace) Your box is more like 1.75 cf. This makes it sound deep and low I would bet... but very low power handling before the mechanical stabilizers in the sub begin to break up. Go easy on the bass EQ knob!
If this were a ported box, that size is appropriate. A Port design has a hole in it of some diameter (2-4" dia.) and a tube of some length to tune the enclosure. The port can be located on the fron panel, rear panel, side or top. Do you see a port hole here?
In a sealed box, there should be no air leaks. If there are air leaks, we loose back pressure to the sub and the cone can go out of control as well. You can test for air leaks by pressing gently on the cone and se how long it takes to return to at rest position. A few seconds... good sealed enclosure... immediate return to rest position... leaky box.
It should not matter what amp you choose to power this speaker box. A home stereo amp or tuner w/ amps will be OK.. just depends on the sub ohmic load. In car audio, most subs are 4 ohm nominal or lower. In home stereo, most subs are 8 ohms.
Hope that helps,
Swez
guy-finnigan on 07/17/2004 19:27:29
It's a sealed box and the cone came up right away when I pushed down on it. Is there an easy/cheap way of sealing the box?
swez on 07/17/2004 19:47:25
Sure... silicone (RTV) is great! Just pull the sub, take the box outside and run a bead of silicone over each joint ith the box. That includes tweeter holes, wiring into box and you can even seal the woofer in if it does not have a foam surround.
Silicone as it cures, will outgas fumes and can damage foam surrounds. If your sub has a foam surround, let the silicone cure overnight with a fan blowing in it, then remount the sub in the morning. If you dont wish to seal the sub with silicone (have to cut out the bead to remove sub again, can use a cork or neoprene gasket about 1/4 - 3/16" thick. You can buy them or make your own. (very carefully cutting with a sharp razor knife.
Finally, you may want to go to a craft store and buy a few of those foam cell blocks. Can glue these into the box and that will reduce the appearant interior airspace of the box. A few of these with dimensions of 12" long x 4" T x 4" W should help. (4-5 of them will do it)
Swez
PS Sorry you asked? lol
guy-finnigan on 07/17/2004 19:50:59
SWEET!.. lol.. Thanks soo much. You have helped out soo much!
guy-finnigan on 07/17/2004 21:34:16
I put the silicone on all the parts that you said. Should I wait a day before I try the sub out again? Or should I try it out right now?
uochronos on 07/18/2004 02:39:15
do not listen to james leave the sub out while the silacone cures then put it in the next day maybe fan out the box also as swez mentioned
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