(2) SUNDOWN SA 8s ENCLOUSER BUILD POOR RESULTS

[alexsimpson2010 0]

ok ssa family members i sure could use your help.... i have 2 sa-8s.... i built a slot ported enclouser.... 37w/12h/13d = 1.5 cd. after port/sub displacement.... i ported this ecclouser 3.25in. wide port 1 was 9in. and port 2 was 28in. long.....35hz..... poor results.... im wondering if port width may be to wide.....this enclouser build just doesnt seem to have decent deep bass.... im thinking possibly aero port enclouser build now.... im using dual 2ohm subs on 1500watts..... 2 ohm load....i need some real experienced advise since mines a failure.... i know best recommended 1.2 cubes now how about this porting issue.... help... help.... every day w/out bass is a day in hell.... its my only escape from the ole lady and reality..... yes i could go with much larger subs.... been their done that....with fi-bl 15s.... im 50 yrs old now and just looking for a smaller set up but yet decent bass.... and these little puppies have it in them.... i just have to build a enclouser to bring it out.... any suggestions and help would be greatly appricated..... thanks to all.....

[REVpuggie 23]

maybe if we could see what you,ve done and how it is set up we could give advice where to go from here .

... so.................

[dbsupra 69]

If I understand your design, I did some math.

A 9" port length would be 1.99cf and 55hz tune. Not surprised that didn't sound very good.

Second port length of 28" would work out to be 1.59cf and 41hz tune. A little high, but had to sound better than the first.

On my sa-8 enclosure I had a 36hz tune and it had pretty good low end extension.

Either your design is a little different than I picture or your math is a little off. Not sure what amp you are using, but you might want to double check that the SSF filter isn't turned up too high as well.

If you can't get a picture of your box, if you could find one that looks similar that would help.

[alexsimpson2010 0]

If I understand your design, I did some math.

A 9" port length would be 1.99cf and 55hz tune. Not surprised that didn't sound very good.

Second port length of 28" would work out to be 1.59cf and 41hz tune. A little high, but had to sound better than the first.

On my sa-8 enclosure I had a 36hz tune and it had pretty good low end extension.

Either your design is a little different than I picture or your math is a little off. Not sure what amp you are using, but you might want to double check that the SSF filter isn't turned up too high as well.

If you can't get a picture of your box, if you could find one that looks similar that would help.

sorry but i can not seem to get a picture to copy and paste probably because i dont know how.... but enclouser has L shape port 3.25 in. wide.... port 1=12in h x 9in length x 3.25in wide and port 2 12h x 28in length x 3.25 wide (total enclouser) 12h x 13d x 37w i calculated this with the (re box cal.) 1.50 cb. after displacement tuned to 35 hz (sorry i cant get my pictures on here). but this really has poor results.... can you possibly suggest a enclouser build for these (2) sa-8s..... i guess cut sheet so i can get this tuned right (35hz)..... thanks for your help....

[dbsupra 69]

Ok if you used the re calculator I know what it looks like. Also that calculator is a little off.

What amp and power are you running? How do you have the subs wired?

Also hoe do you have a 12" tall port when the enclosure is only 12" tall?

[alexsimpson2010 0]

subs are dual 2 ohm they are wired to 2ohm on 1500 watt amp

Ok if you used the re calculator I know what it looks like. Also that calculator is a little off.

What amp and power are you running? How do you have the subs wired?

Also hoe do you have a 12" tall port when the enclosure is only 12" tall?

[ssh 924]

re calc isn't accurate because it doesn't take certain displacements into consideration.

Next time you post dimensions and information, post it like the following so we can actually read it.

wood thickness: 0.75in

width: 20in

depth: 20in

height: 20in

port width: 4in

port height: 6in

port length: 14in

attempted tuning: 30hz

[alexsimpson2010 0]

wood thickness: 0.75

width: 37in

depth: 13in

height: 12in

port width: 3.25

port height : 10.50

port 1 length: 9in

port 2 length: 28 in

attempted tuining :35hz

attempted box volume 1.5 cube ft

re calc isn't accurate because it doesn't take certain displacements into consideration.

Next time you post dimensions and information, post it like the following so we can actually read it.

wood thickness: 0.75in

width: 20in

depth: 20in

height: 20in

port width: 4in

port height: 6in

port length: 14in

attempted tuning: 30hz

[alexsimpson2010 0]

i greatly appreciate the help something simular is what im attemping could you please provide me with a cut sheet or some measurements

wood thickness: 0.75

width: 37in

depth: 13in

height: 12in

port width: 3.25

port height : 10.50

port 1 length: 9in

port 2 length: 28 in

attempted tuining :35hz

attempted box volume 1.5 cube ft

re calc isn't accurate because it doesn't take certain displacements into consideration.

Next time you post dimensions and information, post it like the following so we can actually read it.

wood thickness: 0.75in

width: 20in

depth: 20in

height: 20in

port width: 4in

port height: 6in

port length: 14in

attempted tuning: 30hz

[ssh 924]

2.48069 ft^3 internal volume before port and driver.

0.98 ft^3 port displacement

0.2 ft^3 both subwoofers displacement

net volume: 1.3 ft^3

It's tuned to: 41hz

That's what I came up with. That tuning may be a bit high depending on what genre of music you listen to.

When you state "port length 1 and port length 2", is that because the port is in the shape of an "L", and those lengths make up the "L"? Or did you try one port length of 9", then tried another port length of 28"?

The above tuning is based on a port length of 37".

How do you have the subsonic(ssf) and low pass filter (lpf) set on your amplifier?

[ssh 924]

i greatly appreciate the help something simular is what im attemping could you please provide me with a cut sheet or some measurements

wood thickness: 0.75

width: 37in

depth: 13in

height: 12in

port width: 3.25

port height : 10.50

port 1 length: 9in

port 2 length: 28 in

attempted tuining :35hz

attempted box volume 1.5 cube ft

re calc isn't accurate because it doesn't take certain displacements into consideration.

Next time you post dimensions and information, post it like the following so we can actually read it.

wood thickness: 0.75in

width: 20in

depth: 20in

height: 20in

port width: 4in

port height: 6in

port length: 14in

attempted tuning: 30hz

Ryan from Ram designs can make you a 3d design, with cutouts, it doesn't get much easier then that, and his pricing is very fair. Shoot him a pm: http://www.soundsolutionsaudio.com/forum/user/17102-ram-designs/

[dbsupra 69]

That's the same tuning I came up with but my cft was different?

From my playing around with the sa8 I found the 35hz range to work well.

From here you need to measure how much space you have for the enclosure before coming up with another design.

[Quentin Jarrell 671]

I can't understand your math but herre is an enclosure for two 8's. .6 cubic feet per sub tuned to 35 herts.

[Quentin Jarrell 671]

Disregard the last photo. The port should be 2.25 inchs wide I think. The port extension on the left of the box was 9 inches