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View Full Version : event is near so what freq should i tune my box.



spl_robb
02-14-2010, 05:10 PM
i currently have my box tuned to 31hz but its a removable port so i want to just do a new port just for the event
box is 11.5 net cuft on 2 18"s subs up port back, does any one know the res freq of a jeep cherokee 2dr.????
i have a vid of the box set up min 1:41

http://www.youtube.com/watch?v=a-5QGINHaxM

RAM_Designs
02-14-2010, 05:42 PM
I want to say ~57hz is where they peak at, but maybe my memory is off...

I Like Waffle
02-14-2010, 06:54 PM
I like your install. It has inspired me. Im doing 2 18"s in close to the same box but more powa, trunk car. Waiting on the subs to get here then ill build the box. Also those are in my top 5 fav bump songs, lol.

RAM_Designs
02-14-2010, 07:01 PM
PM snoopdan, he has or used to have a 2-door jeep. I don't remember him running anything other than a wall, but just ask him if he knows what his peaked at with no wall.

Slo_Ride
02-14-2010, 07:03 PM
PM snoopdan, he has or used to have a 2-door jeep. I don't remember him running anything other than a wall, but just ask him if he knows what his peaked at with no wall.

jacob from sundown would know as well

RAM_Designs
02-14-2010, 07:05 PM
jacob from sundown would know as well

His is 4-door I believe.

Slo_Ride
02-14-2010, 07:10 PM
His is 4-door I believe.

ahh, maybe. all i know is its ugly as hell, lol. someone else on here has one, as soon as I remember I'll post it.

TwoEggCustoms
02-14-2010, 07:17 PM
maybe they will let you do a little testing and tuneing you said it was interchangeable ports make one thats about 45 and bring a saw with you and shave it down a little at a time till you peak just an idea

spl_robb
02-14-2010, 11:42 PM
thanks a lot guys, i will start with 45hz and post results

spltuscon
02-15-2010, 05:37 AM
Have you tried moving your box forward at all? I know you'd probably have to fold the back seat down to do it, but your port looks too close to the liftgate for spl...it probably lowers your effective tuning when the gate is closed which might sound better for daily, but I bet you would gain on the mic moving it forward a few inches.
45 is probably a good place to start, so I think your on the right track there.

spl_robb
02-23-2010, 04:22 PM
Have you tried moving your box forward at all? I know you'd probably have to fold the back seat down to do it, but your port looks too close to the liftgate for spl...it probably lowers your effective tuning when the gate is closed which might sound better for daily, but I bet you would gain on the mic moving it forward a few inches.
45 is probably a good place to start, so I think your on the right track there.


so i did the 45hz port and no gain at all not even 1db, moved the box like 3 inches forward and the same, need to try move more the box bun need to fold down the back seat and to do that i have to relocate my batts,worth mentioning that i am metering with the epic160, i know is not going to be the same numbers on the TL but just to get an idea.
any feedback will be greatly appretiated.

pics of the 45hz port vs 31hz

http://i182.photobucket.com/albums/x45/drift_robb/DSC01571.jpg



http://i182.photobucket.com/albums/x45/drift_robb/DSC01572.jpg

RAM_Designs
02-23-2010, 07:02 PM
What frequency are you peaking at?

spl_robb
02-24-2010, 04:39 AM
What frequency are you peaking at?

43hz, the wird thing is that i am peaking at the same freq. with the 31hz port, pointing to back my box, apears that the space from my hatch to the box is acting like port lowering the tuning :(

spl_robb
02-25-2010, 02:48 PM
ok Gained 1db by backing my box 1ft from the hatch, lets see how i do this sunday :)

TwoEggCustoms
02-25-2010, 04:21 PM
goodluck man it takes alot of testing and tuning to get things right just stick in there

RAM_Designs
02-26-2010, 12:58 AM
If you really are tuned at 45hz and have your highest spl at 43hz, you need to drop your tuning lower in order to get your box peaking at 43hz as well. Tuning around 38-40hz should do the trick.