spl design in 1998 blazer 4 door, any help?

[T.I.K. 10+ year member]

A wall with four 12's? Sounds weak.

maybe you missed the part where they were on 7kw?

 

[ktraughb 10+ year member]

maybe you missed the part where they were on 7kw?

Not to mention a properly designed wall can be loud with less cone area and less power. Im sure it's nasty.

 

[ktraughb 10+ year member]

I think im doing 2 12s facing up. One 8 inch aero port inside the box. Can't do external. 4 cubes after displacement tined to 41. You guys think 41the is too low in there?

 

---------- Post added at 10:26 PM ---------- Previous post was at 10:25 PM ----------

 

Port to rear at bottom of box btw

 

[05trailblazer 10+ year member]

i would think it would sound better if both the port and the subs are facing the rear. and also if the port is too close to the rear is not going to sound that good.

 

[pro-rabbit 5,000+ posts]

This is for spl, keeping the port with in 3" of the rear will normally increase the spl in blazer from what I have tested.

 

[bgowdy 5,000+ posts]

This is for spl, keeping the port with in 3" of the rear will normally increase the spl in blazer from what I have tested.

question..... i also have a blazer. so your saying 3 inches from the hatch may increase the SPL? is thats for a Burp or Like Bassracing? cause i dont do burps. i do a bass race type of comp

 

[pro-rabbit 5,000+ posts]

I was testing both. Remeber the each vehicle will load a bit diiferent, but depending on your current set you should increase.

 

[bgowdy 5,000+ posts]

i have a 18 HDC3 5.6cu 8 inch slot/lport(im kinda thinking the portmay be a tad big) subs firing up port back... what do you think

 

[pro-rabbit 5,000+ posts]

Any pics of how it sits?

 

[bgowdy 5,000+ posts]

actually i dont. its sits back to the rear seats while they sit up so ports about 7 - 10 inches from hatch

 

[05trailblazer 10+ year member]

i've had a blazer myself had two twelves both the port and the subs were facing the rear and i had them like about seven inches or so from the back door and sounded great i tried outting them closer to the back and gave me a diffferent response i think because the the closer you put them the less waves expand. thats my opinion.

 

[ktraughb 10+ year member]

I was thinking about stopping right where the cargo tie down hooks are,which is about 4to inches. Looks like ill end up doing about 3.75 for 2 12s, a single 8ex inch aero inside the box tuned to about 41. Buck, if you don't mind to would you double check what port length that would require overall with the flares?

I think about 15.7 ish if I calculated correctly.

 

[pro-rabbit 5,000+ posts]

I was thinking about stopping right where the cargo tie down hooks are,which is about 4to inches. Looks like ill end up doing about 3.75 for 2 12s, a single 8ex inch aero inside the box tuned to about 41. Buck, if you don't mind to would you double check what port length that would require overall with the flares? I think about 15.7 ish if I calculated correctly.

In order to check the tuning, we would need the following..

Actual enclosure size

woofers used

what bracing if any

This all can change tuning and port length and tuning

 

[ktraughb 10+ year member]

I've got plenty of room so 3.75 will be after displacement of ports and subs using 2a american bass hd 12s. 1 inch wood with 45sthe in corners and no other bracing.

 

[ktraughb 10+ year member]

may tttry a box with subs forward and port to rear. Has anyone ever tried this with a slot port instead of aero ports? My existing amp and battery rack is 27a inches long and 11I inches wide and stands 17 inches high. This leaves 27 inches wide, 17 high and about 27 deep. If I use an aero with this space it would need to be internal. If I put the amps on the floor and move the bats I can use an external aero. Thoughts? Im not against subs up and port back with either slot or aero, just thought of trying something different.