Posted May 24, 201114 yr Well chaps I'm not 100% happpy with the SPL of my box, its 16.5cuft before displacement, and tuned onto 30hz, port area is 8.3in^2 per cuft, now recommended space for the subs is 6.5 per driver, and I presume port area should be 10^2inches per cuft, so should I line the entire inside of the box with an extra skin of MDF(flex is another issue except on the front baffle) this will reduce area, and also should I change the port for a larger one on the same tuning?? Any advice greatly appreciated lads
May 24, 201114 yr Been doing some planning on a wall myself. Check this site for minimum port sizes and port lengths: http://www.carstereo.com/help/Articles.cfm?id=31Will be checking back to this thread to see what you are coming up with.
May 24, 201114 yr Author Woofers are AA Mayhem 18's they require 6-6.5 cuft each, Will be looking to see exactly what I can do to increase output before I go at tearing the front baffle off
May 24, 201114 yr Author Cant remember exact dimensions, I think its 450mm wide, 150mm high and 500mm long, but final tuning was 30HZ
May 24, 201114 yr Cant remember exact dimensions, I think its 450mm wide, 150mm high and 500mm long, but final tuning was 30HZThat would only be about 100"2 and you probly need double that or more.
May 24, 201114 yr Author I thought 10square inches was enough?? Do I defo need double that?? Will the box still play flat??
May 24, 201114 yr Port area is WAYYY smallTake a look at this calculator for port area: http://www.carstereo.com/help/Articles.cfm?id=31What is your actual goal with this setup?
May 24, 201114 yr Author My goal is to be Brutal on Music, BUT 150+DB on music, I have the power supply and equipment so the box is my only let down
May 25, 201114 yr Have you looked at the site I posted to check your minimum port area?? <-- This will help with your enclosures output! When getting more area for your port you will see that you will start to run out of space with your enclosure because of the port displacement so you will have to find a happy medium between the two. No one can tell you exactly, well I sure can't. BUT you will have to get more output with more port area than you had!
May 25, 201114 yr Port area is WAYYY smallTake a look at this calculator for port area: http://www.carstereo...icles.cfm?id=31What is your actual goal with this setup?I'm well acquainted with Vance Dickason's port area formula, with his woofers, I would use more port area than he has planned.
May 25, 201114 yr JosephPlease send me internal box dimensions. I'll give you the pointers to make it work.More port area would be better, don't worry to much about musicality I can assure you it will play like a beast. Put up some numbers and I'll do some crunching
May 26, 201114 yr Author Thanks Am, Will be tearing the front baffle off next week, so I will have the dimensions for you chap
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