Free air 8" or 10" mounted on back??

tmorefi · Post by **tmorefi** » Mon Sep 12, 2005 5:11 pm

I have a 4 door sedan and was considering mounted either a 8" or 10" sub (free air) on the back deck facing up towards the window? I have a few IDv3's I could use but would this work ok? Not looking for any crazy bass just something to help round out ther system. I am afraid the back "deck" would rattle too much and the free air wouldn't sound very good. Any comments? Thanks.

Bwcad1 · Post by **Bwcad1** » Mon Sep 12, 2005 5:16 pm

ive used a couple of free air pioneers i got of ebay in a friends car didnt sound all that bad especially cause i only payed 15 dollars with shipping!

Ryan from Ohio · Post by **Ryan from Ohio** » Mon Sep 12, 2005 5:19 pm

This sucks. Been there done that, no good.

smoker · Post by **smoker** » Mon Sep 12, 2005 5:19 pm

not familiar with your subs at all but i have in the past used free air kicker subs that sounded good. as far as your deck you will have to make a baffle and secure it and that will include any sound deadening that you need to do.

tmorefi · Post by **tmorefi** » Mon Sep 12, 2005 5:35 pm

They are Image Dynamics IDv3 8" subs. They are not free air subs but the spec says they can be used in a free air situation. I could buy other subs if needed. Interested more if the application can be done and then I can decide which sub.

smoker · Post by **smoker** » Mon Sep 12, 2005 5:36 pm

years ago i remember guys using aperiodic membranes in your situation to get better results but what kind of car do you have? i cant imagine a pair of 8's causing a lot of trouble

High Society · Post by **High Society** » Mon Sep 12, 2005 8:29 pm

Why not a small stealth box? I'm sure that sedan has a place in the trunk for a nice stealth look. My buddy has a free air pioneer in his deck, and it sounds like garbage IMO.

Jonathan · Post by **Jonathan** » Mon Sep 12, 2005 8:43 pm

It can work, you just have to do a lot of prepping. Free air gets best results if you seal off the front and back waves very well, via extensive use of expanding foam, a good baffle and a lot of sound deadening.

Ryan from Ohio · Post by **Ryan from Ohio** » Tue Sep 13, 2005 2:58 am

I put two 10" CDT MS-100 mini box subs in the rear deck of a 95 Monte Carlo.

The results were mediocre at very best. I figured it would be really loud since the subs were right there. It was not. It may work for more of a mid range application but if you want sub bass this is not the way to go.

Post by **GlassWolf** » Tue Sep 13, 2005 7:13 am

you also need subs designed for free aitr use.. you can't use any sub off the shelf in an infinite baffle setup.
you'd be better off just putting a small sealed box in the trunk and coupling the trunk space to the cabin air with the openings in the rear package shelf.