veggie-man wrote:Alright for those who don’t want to read this I understand, so I just bolded the main points:
I just received my box today (sealed) and when I bough it I got it made to the specs of the sub (displacement was calculated in there). I also got that ployphill, which if I’m correct almost fools the sub to make the box seem much large than it is? Now would I leave that polyphill in there even though my box is already the right size?
Polyfill to begin with certainly doesn't make the box much larger than it is...
In fact, the effect is tremendously mild... and it only affects the response curve shape from a frequency response standpoint, it does not affect efficiency... a sub in a small box is simply always going to be less efficient than a sub in a big box, there's no getting around that. ]I ordered my box from
http://www.klausaudio.com/ they sealed it for me and everything.. but do you think I
should go over it and seal it again? One thing I noticed is that the terminal cup isn’t sealed at all should I go over that real quick with some sealant?[/quote]
If you are hearing air leaking from the enclosure, you should seal it... otherwise, while it won't hurt (unless you put the sub back in before the sealant is fully cured - the fumes can compromise certain types of surrounds/spiders), it won't help anything either.
Remember, with a box, while there are pressure forces at work, there are never constant pressure forces... rather you are talking about a cone that is moving in and out at a rate of 20-100 cycles per second, and the pressure forces inside the box are transitioning from a "pressure" to "vacuum" at that same rate.
Even if you had a small air leak, it likely wouldn't hurt anything, unless it were a big hole... even a 1/4" hole in your box wouldn't affect anything (in fact, it would probably behave a bit like a passive radiator, or a variovent), except when you were standing right next to your box, you'd hear the air leaking.
But if you want to seal it - make sure it's cured before replacing the sub.
Now when I’m mounting the amp I believe I saw it was not recommended to mount it to the side of your box (I’m guessing so it doesn’t over-heat?) So what I was thinking to put it on one of the back seats that fold down. The thing with this is the vents will be on a horizontal slant … and I think the vents have to be on a vertical slant (So the vents are going up and down instead of one on the top and the other on the bottom)?If I can’t mount it on a horizontal slant where should I mount it?... try and build an amp rack?
Actually amps mounted on a vertical surface dissipate heat more efficiently than an amp mounted on a horizontal surface. The heat rising off the amp actually generates a slight rising wind that helps pull the heat off the heatsink above that point - it's a good option.
Even if you mounted your amp upside down, you'd only be looking at something like a 20% reduction in heat-shedding efficiency - it's a matter of convection.
Generally mounting your amp to your box is only bad in two respects:
1) it makes a real easy smash-and-grab for a theif. Of course, if your car is broken into to begin with, you've likely made a target of yourself - there's got to be SOME reason the theif knew something was in there...
2) the subwoofer causes some real vibrations - depending on how well that box is built (and even regardless of that, to some degree), the panels of the box may be vibrating - and if you have an amp mounted to that, there may be vibrations transferred to the amp, which can break componentry off the board in the long term.
Mounting the amp on the seatback sounds like the superior option to me - you'll still be vertical enough to even gain the slight vertical-convection advantage of that type of mounting.
[quote="veggie-man"]Alright for those who don’t want to read this I understand, so I just bolded the main points:
I just received my box today (sealed) and when I bough it I got it made to the specs of the sub (displacement was calculated in there). I also got that ployphill, which if I’m correct almost fools the sub to make the box seem much large than it is? [b]Now would I leave that polyphill in there even though my box is already the right size?[/b][/quote]
Polyfill to begin with certainly doesn't make the box much larger than it is...
In fact, the effect is tremendously mild... and it only affects the response curve shape from a frequency response standpoint, it does not affect efficiency... a sub in a small box is simply always going to be less efficient than a sub in a big box, there's no getting around that. ]I ordered my box from [url]http://www.klausaudio.com/[/url] they sealed it for me and everything.. but do you think I [b]should go over it and seal it again?[/b] One thing I noticed is that the terminal cup isn’t sealed at all should I go over that real quick with some sealant?[/quote]
If you are hearing air leaking from the enclosure, you should seal it... otherwise, while it won't hurt (unless you put the sub back in before the sealant is fully cured - the fumes can compromise certain types of surrounds/spiders), it won't help anything either.
Remember, with a box, while there are pressure forces at work, there are never constant pressure forces... rather you are talking about a cone that is moving in and out at a rate of 20-100 cycles per second, and the pressure forces inside the box are transitioning from a "pressure" to "vacuum" at that same rate.
Even if you had a small air leak, it likely wouldn't hurt anything, unless it were a big hole... even a 1/4" hole in your box wouldn't affect anything (in fact, it would probably behave a bit like a passive radiator, or a variovent), except when you were standing right next to your box, you'd hear the air leaking.
But if you want to seal it - make sure it's cured before replacing the sub. ;)
[quote]Now when I’m mounting the amp I believe I saw it was not recommended to mount it to the side of your box (I’m guessing so it doesn’t over-heat?) So what I was thinking to put it on one of the back seats that fold down. The thing with this is the vents will be on a horizontal slant … and I think the vents have to be on a vertical slant (So the vents are going up and down instead of one on the top and the other on the bottom)?[b]If I can’t mount it on a horizontal slant where should I mount it?... try and build an amp rack?[/b][/quote]Actually amps mounted on a vertical surface dissipate heat more efficiently than an amp mounted on a horizontal surface. The heat rising off the amp actually generates a slight rising wind that helps pull the heat off the heatsink above that point - it's a good option. :thumbsup
Even if you mounted your amp upside down, you'd only be looking at something like a 20% reduction in heat-shedding efficiency - it's a matter of convection.
Generally mounting your amp to your box is only bad in two respects:
1) it makes a real easy smash-and-grab for a theif. Of course, if your car is broken into to begin with, you've likely made a target of yourself - there's got to be SOME reason the theif knew something was in there... ;)
2) the subwoofer causes some real vibrations - depending on how well that box is built (and even regardless of that, to some degree), the panels of the box may be vibrating - and if you have an amp mounted to that, there may be vibrations transferred to the amp, which can break componentry off the board in the long term.
Mounting the amp on the seatback sounds like the superior option to me - you'll still be vertical enough to even gain the slight vertical-convection advantage of that type of mounting. :thumbsup