So here's the deal. I have a Sundown 1200D, a Sundown 125.2 powering my setup. I will breeze over the 125.2 which will be hooked up to 2 sets of Polk db6501 components (2 ohm load) on each channel giving me a net of 100 watts to each speaker.

I am building a CUSTOM box for a12" TC Sounds LMS-R sub. This sub can handle 1k watts continuos and 4k peak. I can wire this sub to be a 1 ohm load which is a load my 1200D can handle (giving out 1200 watts).

I am trying to decide if I should port the box I am planning on building needs a port or not, and if so how long, size, ect I need it to be. I believe I correctly modeled the Treo TE sub I have now (in a ported probox) in the SPL image. Please note the Green line is the ported 12, the yellow is sealed and the orange is the Treo.

I would greatly appreciate any help with this.

Also the internal height of all dimensions is 6 inches and there will be a cover (with holes cutout for the amps) that will go over the amp section so it looks all nice and neat. I also will be creating a spacer of some sort since the mounting depth the sub needs (7.15) is more than the current height of the box (6 3/4).

So as it stands the box is right around 2 cubic feet taking into account bracing which will be needed.

So if I port, what size, length, etc.

I really appreciate any help I can get on this.

Something looks wrong with the treo. Have you done a sweep to see if it really has that big of a boost?

And don't forget that the port must be subtracted from the total box volume. Also, when you space up the sub, remember that the pole vent needs room to breath.

Edited September 12, 201114 yr by Duane

Something looks wrong with the treo. Have you done a sweep to see if it really has that big of a boost?

And don't forget that the port must be subtracted from the total box volume. Also, when you space up the sub, remember that the pole vent needs room to breath.

LOL, honestly I have no idea. I am new to WinISD. I think I might have it figured out a bit as I didnt have the right frequency for the Treo. I am learning this as I go.

I am going to remodel the graph, but I think I got it where I want it. The TC sounds with a 1x6x18 slotted port gets me 108db @ 20 hz. The TC starts to bottom out at 15 hz, so I will more than likely be using the subsonic filter at 20hz anyway.

I am redoing the calculations for the Treo and will repost a better apple to apple graph.

Edited September 12, 201114 yr by EndersShadow