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Falcons
10-27-2012, 02:09 PM
i have a few questions.

1.) how does forward firing sealed from the trunk help with sq?

2.) what is usually the best tuning for a smooth roll off? or is this pure car dependant? if so im going to decide this for myself.

3.) what do you guys use to seal the box from the trunk?

4.) is there anyway i can seal off the box from the trunk and still be able to use my back seats?

Falcons
10-27-2012, 02:38 PM
1. helps with trunk rattle.
2. Great Stuff or any other type of spray foam from lowes, home depot, etc.
3. U need to decide tuning once youve put the box in and adjust to your type of music.
4. Yes. You just gotta leave a few inches in font the box so the seats will still go back. Basically , dont extend the box into the cabin of the car

cool beans. thanks bro

Falcons
10-27-2012, 02:50 PM
ALso seen guys make some fill panels and not use the spray foam. I used both. I did the spray foam first, then cut some fill panels and wrapped them in vinyl to cover the gaps i had. It worked very nicely. You dont have to use 3/4 inch material for the fill panels. You can do 1/2, 3/8 or even 1/4 for the fill panels. Wrap them in vinyk , carpet, or heck you can even paint them.

this is what i plan on doing. i really want to do a pure sq install. i want to by the rf 3sixty.1 just because it is cheaper now. im past the whole hey check out how loud my system can get stage. its more impressive to me to have a 300 watt sub, completely hidden with the staging all brought foward with flat responses then a 20k system where the bass is the main part of the install.

Chriszle
10-27-2012, 02:55 PM
Forward firing sealed isn't the answer for every trunk. You may have more SQ and be louder unsealed. I am no expert on SQ, but a general rule is, if your trunk is louder rear firing it will meter better sealed and forward firing. If your trunk is louder forward firing, then it will lose when you seal it.

Falcons
10-27-2012, 02:57 PM
thanks for the help guys. lets get some more sq guys in here. keep_hope_alive ; ge_off_me;

goingdef
10-27-2012, 03:00 PM
I fire fowardinto the cab of my car and it reduces rattles but at the same time it reduces output, if I find that loading off the trunk is much more efficient if your going with low power so you may just want to consider deadening it even better.

PHD - USA
10-27-2012, 03:01 PM
I think it depends on the car and the treatment done to the trunk. In my trunk I like to fire my subs facing the sides because it feels like there is more impact. that might just be me though.

Falcons
10-27-2012, 03:04 PM
i plsn on completely deadening my car eventually. waiting on black friday though becasue money is tight right now. all i need is more deadener, midbass, some tweeters, and a processor to go active and im all set.

PHD - USA
10-27-2012, 03:10 PM
my trunk is completely deadened as well. Best thing to do honestly is try a couple different methods and see which one you like best

cdc351jeferson
10-27-2012, 03:18 PM
I turned my box around and forward fired in to cabin meh rear fire is better for me sounds better and louder loading off trunk

CJL
10-27-2012, 03:45 PM
Do you guys with sealed off trunks have to ride with the back seat down all the time?

NASTY08IMPALA
10-27-2012, 04:54 PM
You can seal forward and still use back seats ....it will help spl if fully sealed..but as far as sq i dont like it for daily listening ..firing towards trunk sounds alot better and best for me imo

Falcons
10-27-2012, 05:59 PM
my trunk is completely deadened as well. Best thing to do honestly is try a couple different methods and see which one you like best

thanks geoff. could you pm me with some info on what you do to get the best sq out of your system. im officially switched over to sq. i would just like some pointers on what i need to do. thanks.

double 07
10-27-2012, 06:18 PM
Depends on the car I guess......This is my forward facing setup........It does a 147.5 @ 37 hz with my back seat in and sound only coming through center armrest....Mine is tuned to 36 and it plays music very well.....two AA Havoc 12s and a DC 3.5k wired @ 1/2 ohms nominal....:).........Oh and my car has ZERO RATTLES......


http://i1079.photobucket.com/albums/w513/pwdrblucivic/0818120941.jpg

Falcons
10-27-2012, 06:20 PM
Depends on the car I guess......This is my forward facing setup........It does a 147.5 @ 37 hz with my back seat in and sound only coming through center armrest....Mine is tuned to 36 and it plays music very well.....two AA Havoc 12s and a DC 3.5k wired @ 1/2 ohms nominal....:).........Oh and my car has ZERO RATTLES......


http://i1079.photobucket.com/albums/w513/pwdrblucivic/0818120941.jpg

Wow man that looks beautiful. Great work

double 07
10-27-2012, 06:25 PM
Thanks...it does except for the sub on the right AA sent me a messed up re-cone a while back.....The coil assembly was glued in a little too high......That's why it has a dented dust cap........It didn't affect its output at all though........lol

Falcons
10-27-2012, 06:30 PM
Thanks...it does except for the sub on the right AA sent me a messed up re-cone a while back.....The coil assembly was glued in a little too high......That's why it has a dented dust cap........It didn't affect its output at all though........lol

Haha as long as you know your work is legit.

keep_hope_alive
10-28-2012, 01:24 AM
http://i38.photobucket.com/albums/e128/phat_funky_beats/Accord%202009/AccordTweeters005.jpg

http://i38.photobucket.com/albums/e128/phat_funky_beats/Accord%202009/0610trunkIBwall/accordtrunk_IBwall_finish027.jpg

http://i38.photobucket.com/albums/e128/phat_funky_beats/Accord%202009/0610trunkIBwall/accordIBwall038.jpg

http://i38.photobucket.com/albums/e128/phat_funky_beats/Accord%202009/0610trunkIBwall/accordtrunk_IBwall_fg005-1.jpg


no great stuff foam for me.

sealed off prevents phase interference from sound bouncing around in the trunk and arriving later. the extra output some trunks get is from constructive interference at a few frequencies (usually in the 40-60Hz range). but that means you also have cancellation at other frequencies. it is somewhat vehicle dependent since it relates to geometry. and it depends on the enclosure as well. sound off the rear of the sub will reflect off the rear box wall and come back out the cone. this plagues all speaker systems. controlling it is hard. it's why i gain output by opening my trunk. i eliminate the destructive reflections that come back through my woofer cones.

keep_hope_alive
10-28-2012, 01:27 AM
the rear seat will actually help you by absorbing some harmonics - like an aperiodic membrane. i keep my ski-hole down most of the time - which allows plenty of airflow. but even with it up, i'm still happy.

Falcons
10-28-2012, 01:28 AM
I wish I had your car.

CAT MAN
10-28-2012, 02:13 AM
i have a few questions.

1.) how does forward firing sealed from the trunk help with sq? cleaner sound less rattle from other crap. smoother

2.) what is usually the best tuning for a smooth roll off? or is this pure car dependant? if so im going to decide this for myself.

3.) what do you guys use to seal the box from the trunk? great stuff in a black can

4.) is there anyway i can seal off the box from the trunk and still be able to use my back seats? no

:wave: