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<blockquote data-quote="duanebro" data-source="post: 7647122" data-attributes="member: 636988">This is a great example of why Winisd is a great tool. You should d/l it (look it up on facebook for the latest version.) You can load the original box and then a new box at the same time to see the differences are. If you already know what one of the boxes sounds like in your car you can get a very good idea if the new one will be better or worse.As far as lowering the tuning of the box. If your using a slot port try adding a piece of wood in the middle of the port. It can end where the flare starts. Adding more pieces will lower tuning more. Do this temporarily to check the effect on the box. This is the same as making two ports. If it is easier set the piece in the bottom of the port and hold it in with some blue tac. Yes, this is just shrinking the port to lower tuning. I would do this so I wouldn&#039;t have to build several more boxes. A smaller port will work just fine at lower volumes. It is the air speed as you crank it up that causes problems with noise and port compression. Check what frequency you are at when you get to what you like. Now you might want to build another box. You can put things in the box to lower volume of the box to if you want to play with that. Bricks work well, just don&#039;t drive with them in!</blockquote>

[QUOTE="duanebro, post: 7647122, member: 636988"] This is a great example of why Winisd is a great tool. You should d/l it (look it up on facebook for the latest version.) You can load the original box and then a new box at the same time to see the differences are. If you already know what one of the boxes sounds like in your car you can get a very good idea if the new one will be better or worse. As far as lowering the tuning of the box. If your using a slot port try adding a piece of wood in the middle of the port. It can end where the flare starts. Adding more pieces will lower tuning more. Do this temporarily to check the effect on the box. This is the same as making two ports. If it is easier set the piece in the bottom of the port and hold it in with some blue tac. Yes, this is just shrinking the port to lower tuning. I would do this so I wouldn't have to build several more boxes. A smaller port will work just fine at lower volumes. It is the air speed as you crank it up that causes problems with noise and port compression. Check what frequency you are at when you get to what you like. Now you might want to build another box. You can put things in the box to lower volume of the box to if you want to play with that. Bricks work well, just don't drive with them in! [/QUOTE]

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