kicker L7 dissapoints me.

[Immacomputer 10+ year member]

I think you have that backwards. When an enclosure is properly sealed, the sub will take several seconds to come back up. If it immediately pops back up, then you have a definate leak somewhere.

No, that's not true at all. If the enclosure is really sealed correctly, the air you're compressing in the enclosure has no where to escape so it pushes back against the cone. This makes the sub move back to it's original position quickly. If there is a leak, the sub will return slowly as air was first forced out when you pushed the sub in and is now slowly refilling the enclosure as the sub tries to return to it's original position.

 

[DaveDSMer 10+ year member]

thank you computer beat me to it.

 

[thunder9500 10+ year member]

ok, you guys probably know more than me anyway. //content.invisioncic.com/y282845/emoticons/eyebrow.gif.fe2c18d8720fe8c7eaed347b21ea05a5.gif

 

[tommyk90 5,000+ posts]

No, that's not true at all. If the enclosure is really sealed correctly, the air you're compressing in the enclosure has no where to escape so it pushes back against the cone. This makes the sub move back to it's original position quickly. If there is a leak, the sub will return slowly as air was first forced out when you pushed the sub in and is now slowly refilling the enclosure as the sub tries to return to it's original position.

Wrong.

A ported (leaky) box will let the sub spring back quicker because the pressure can equalize quicker.

A sealed box restricts woofer movement (ever wonder why it is easier to get a ported woofer to move farther, i.e. reach xmax, with less power versus a sealed box? Ever wonder why nearly every sub manufacturer will state that you can feed more power to a sealed sub versus a ported one?) and if you push on the cone it will NOT return quickly.

If you don't believe me, go get a ported and sealed box and give it a shot. $5 says you will retract your previous statement.

Why do you think people are using bandpasses for SPL competitions nowadays? It helps restrict woofer movement so you have more control over the sub (and can feed it more power) while still having the output of a ported enclosure.

 

[Immacomputer 10+ year member]

Wrong.
A ported box will let the sub spring back instantly because the pressure can equalize quicker.

A sealed box restricts woofer movement (ever wonder why it is easier to get a ported woofer to move farther, i.e. reach xmax, with less power versus a sealed box? Ever wonder why nearly every sub manufacturer will state that you can feed more power to a sealed sub versus a ported one?) and if you push on the cone it will NOT return quickly.

If you don't believe me, go get a ported and sealed box and give it a shot. $5 says you will retract your previous statement.

Why do you think people are using bandpasses for SPL competitions nowadays? It helps restrict woofer movement so you have more control over the sub (and can feed it more power) while still having the output of a ported enclosure.

Um, I don't think you understood my post. How about you go build a correctly sealed enclosure and put a sub in it and push on the cone. The cone will be slightly difficult to push due to the air inside acting like a spring on the cone. When you let go, that spring will release and push the cone back out quickly.

Go do it. I have done it and I know the results. Should I make a video? I have also done it with a not-so-sealed enclosure and the sub slowly returns to it's position. When I pushed in the cone on that sub, I could hear the air leaking.

What does cone control have to do with pushing on the cone of a sub while there is no power going to it? I'm completely lost here.

What happens when you take a balloon and push on it? Does the side of the balloon slowly return to it's original position or does it snap right back into it's position of equilibrium? According to you, it should return slowly. //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[tommyk90 5,000+ posts]

Um, I don't think you understood my post. How about you go build a correctly sealed enclosure and put a sub in it and push on the cone. The cone will be slightly difficult to push due to the air inside acting like a spring on the cone. When you let go, that spring will release and push the cone back out quickly.
Go do it. I have done it and I know the results. Should I make a video? I have also done it with a not-so-sealed enclosure and the sub slowly returns to it's position. When I pushed in the cone on that sub, I could hear the air leaking.

What does cone control have to do with pushing on the cone of a sub while there is no power going to it? I'm completely lost here.

What happens when you take a balloon and push on it? Does the side of the balloon slowly return to it's original position or does it snap right back into it's position of equilibrium? According to you, it should return slowly. //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

According to you, an enclosure with a big hole in it will still let the sub return slowly.

I've had sealed boxes, i know how they perform. The sub is harder to push in and the sub slowly returns to rest. A ported box allows the sub to move in and out quicker and easier. Talking about cone control in a powered situation is completely relevant. It's the same as pushing on the cone, just on a much faster and larger scale. A sealed sub will move less than a ported sub with the same power because a sealed box restricts movement. That's what I was trying to get across.

We can both make videos if you like?

 

[Lakota 5,000+ posts]

//content.invisioncic.com/y282845/emoticons/popcorn.gif.32dd9e22fd77e77bc3c907062768fcd2.gif

 

[ds80mx 10+ year member]

According to you, an enclosure with a big hole in it will still let the sub return slowly.
I've had sealed boxes, i know how they perform. The sub is harder to push in and the sub slowly returns to rest. A ported box allows the sub to move in and out quicker and easier. Talking about cone control in a powered situation is completely relevant. It's the same as pushing on the cone, just on a much faster and larger scale. A sealed sub will move less than a ported sub with the same power because a sealed box restricts movement. That's what I was trying to get across.

We can both make videos if you like?

Im agreeing with immacomputer, in a sealed box the cone will spring right back. I think it depends on the leak. If its a bigger leak the air will not be slowing seeping in and it the cone will act like it was in a ported enclosure. If you push in the cone on a sealed enclosure with a smaller leak, the air will move back into the box more slowly causeing the cone to slowly go back to its original state.

 

[thunder9500 10+ year member]

You guys actually believe a sealed box should spring the sub back up?

You're kidding me right?

A completely sealed box will do one thing when the cone is pushed on.....and that's SLOWLY return to position.

Sounds like I'll be making a video myself.

 

[m4i2k2e2 10+ year member]

sounds to be a ton of installation issues... 800 watts peak isn't going to make that sub do what it is capable of. Edit: make sure your amp is hooked up properly. Build a ported box and you'll be amazed.
kthnksbi x2

i have a zx750.1 power this L7. i was talking about my other subs i had.

 

[xtremekustomz 10+ year member]

If the enclosure is properly sealed it should take a few seconds for the cone to return to normal position. You shoudln't be pushing on the cone anyway.

 

[almond 10+ year member]

tommyk is right about a ported box, but computer is right about sealed boxes. **** your like children. your both arguing different points at each other. in a sealed box with no air leaks what so ever when you push down on the cone the cone will spring back because of the compression due to the cone moving in. when released it forces the cone out the equalize the pressure behind the sub. if there is a leak in the box when you push the cone down it will push the air out of the leak and when you realease it the sub will slowly come back to it's normal resting place because the air is slowly coming back into the enclosure through the leak and equalizing the pressures. now this has nothing to do with a ported box. in a ported box yes the sub will come back to an original position very quickly because the big *** hole (aka port) allows the air to equalize very quickly.

none of this was an attack or anything, merely me trying to explain the pictures in my head with my limited communication skills know what i mean //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[almond 10+ year member]

if you really think about it if the sub is to come back slowly where did all the air inside the enclosure go?? through the leak!! and the vacuum created inside the enclosure is what is keeping the sub from springing back quickly.

 

[almond 10+ year member]

where as a completely sealed box will build pressure behind the sub and that is what springs the sub back.

 

[Immacomputer 10+ year member]

According to you, an enclosure with a big hole in it will still let the sub return slowly.
We can both make videos if you like?

You're ridiculous. I never said a box with a large hole will return slowly. Of course it will spring back as fast as the suspension will allow. The reason it returns slowly with a small leak is because the air is trying to enter the enclosure but it is heavily restricted. The larger the hole, the faster the sub will return because the air becomes less and less restricted. Just like said above, you create a vacuum when you push in the sub and there is a small leak. This does NOT happen when the enclosure is properly sealed because there is no vacuum because there is no leak. The air acts as a spring and forces the sub back to it's position.

Please make a video. Don't forget to duct tape around the sub and get tons of shots of inside the enclosure.

Either way, you will not listen to me or believe me because you think you're the Jesus of car audio and I'm some loser trapped in "theory" world or whatever.