Can someone help me model a sub Please?

[Coheednme13]

the reason I have so many questions is because this will be my first enclosure build. If it's any concellation(sp?) to you guys I am learning a lot and from what you've told me and looking at builds on the forum I feel confindent that I can build this enclosure.

 

[TLS Guy]

I need to know this answer so that I can begin designing the enclosure



I plan on making the width of the enclosure to account for this because I feel you state the bennefits of simplifying construction and adding strength. I'm trying to take Annunaki's enclosure dimensions and TLS's vent recommendations and blend the two to end up with a net enclosure size of 2.7 cubic feet


Again to both of you guys you are both really great treasures to this forum for helping me so much. I can not tell you how much I appreciate your help.

Matt

The 2.7 cu. ft. volume is the air in the enclosure and vent. Damping material is allowed for but nothing else, so driver displacement, bracing, wood for the vent that displaces air in the enclosure and amps, will have to be added to the 2.7 cu. ft.

Increasing vent width to 15.5" increases vent length to 57.37". which rounding it off is 57 1/2". Vent peak air velocity drops to 14 m/sec. So you won't have any vent noise with that.

 

[TLS Guy]

the reason I have so many questions is because this will be my first enclosure build. If it's any concellation(sp?) to you guys I am learning a lot and from what you've told me and looking at builds on the forum I feel confindent that I can build this enclosure.

Don't give it a second thought. When someone goes about a build sensibly like you, then we are only too glad to help.

I'm heading to Benedict now, and if you have more questions, I will be there in about five hours or so. I have to get there before the winter storm.

 

[Coheednme13]

don't worry TLS Guy I'm going to try to make the enclosure width 14" so that when the sides are subtracted I'll have a port width of 12.5" just like you suggested. If making the width 14" makes an unattractive sized enclosure then I will just make the port independently inside the enclosure

 

[Coheednme13]

ok guys I have a preliminary rough idea of how I want to lay things out inside I think that if I make the enclosure around 3.2 cubic feet and then add bracing, driver, rockwool, port material I can get it down to 2.7 cubic feet net.

Please let me know any suggestions or criticisms.

I don't have more vertical braces bc there isn't a lot of room after the driver to put one without interfering with the port opening.

Also, how do I calculate a volume for rockwool?

Diagram red area is port, brown is bracing, and black is rockwool or some sort of dampening

 

[Coheednme13]

of course all bracing will be window bracing

 

[annunaki]

of course all bracing will be window bracing

It looks good so far.

You MUST account for the volume INSIDE the vent as well as the wood used for the vent. If you fail to do this you will wind up with misaligned tuning (substantially higher)

My original suggestion will allow for proper bracing as well as woofer displacement. You do not need much rockwool in the enclosure either. Just enough for the back panel covering the vent.

After recalculating, you will have no issues with the design I suggested if build & constructed properly.




If you wanted to get a little bit smaller I have a design below:

External dimensions:

23 H x 15.5 W x 25 D

Net volume before bracing woofer & rockwool displacement: 3.11ft^3

I doubt you will be displacing .4ft^3 but it is good to be safe

Vent dimensions (internal): 2.0" H x 14" W x 43.875" (7/8) L

Let me know if you have more questions.

 

[Coheednme13]

what type of power do I need for this enclosure to be optimal

 

[TLS Guy]

ok guys I have a preliminary rough idea of how I want to lay things out inside I think that if I make the enclosure around 3.2 cubic feet and then add bracing, driver, rockwool, port material I can get it down to 2.7 cubic feet net.

Please let me know any suggestions or criticisms.

I don't have more vertical braces bc there isn't a lot of room after the driver to put one without interfering with the port opening.

Also, how do I calculate a volume for rockwool?

Diagram red area is port, brown is bracing, and black is rockwool or some sort of dampening

Box pro corrects for the air displaced by the damping material so you don't have to worry about that.

 

[annunaki]

what type of power do I need for this enclosure to be optimal

10w3v3 500-600 watts rms should be suitable for most any listener. I don't think you would need any more than that since you will not be using eq to boost response (vented enclosure) the response.