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Lets Discuss Sealing off the trunk. Results Inside


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And I always meter sealed up.. My peak was at 44hz in the trunk, went down to 42hz sealed off. I will note that I have not tested freq above 50hz.. the spl dips lower and lower starting at 48-50hz so I dont think its going to magically spike at 5xHz. And I just meter under SPL not any particular org or setting usually with the peak hold on.. for obvi reasons

Setup:


2010 Hyundai Elantra


Factory Unit via 4 chan NVX LOC


Excessive Amperage "H/O" Alt


Xs D3400/ Xs XP3000


Big 3. 2 Runs of +, 2 Runs of -


DD M3b and 2 12" AQ HDC4s

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Does it sound louder to the ear?

I mean the dif between a 43 and a 46 isnt super noticeable to my ear.. so it sounds quieter on higher notes and louder on lower notes, but then again I could be half crazy..

Setup:


2010 Hyundai Elantra


Factory Unit via 4 chan NVX LOC


Excessive Amperage "H/O" Alt


Xs D3400/ Xs XP3000


Big 3. 2 Runs of +, 2 Runs of -


DD M3b and 2 12" AQ HDC4s

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and it might be worth mentioning i retained the stock speakers and sealed each layer around them.. I figure they shouldnt leak..

Setup:


2010 Hyundai Elantra


Factory Unit via 4 chan NVX LOC


Excessive Amperage "H/O" Alt


Xs D3400/ Xs XP3000


Big 3. 2 Runs of +, 2 Runs of -


DD M3b and 2 12" AQ HDC4s

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Share on other sites

I'm subbed! In the same "boat"

376377_3231809446371_1571988973_n.jpg

Pontiac Grand Prix GT
400a Mean Machine alt.

EIGHT DD 12''s on a DDz2
DD vo 8''s,6''s,5.25''s&tweets
Norfolk, VA
http://www.youtube.c...ser/ovnorfolkva
https://www.facebook.com/groups/TheSPLSpot/473815915987218/?notif_t=group_activity#!/chrishova
http://www.stevemead...__fromsearch__1[/color]

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That doesn't look sealed off lol, get some spray foam in that shit, you still have massive air finding its way into the cabin

Team Sundown Audio

**CURRENT** -- 2012 Scion tC Build Click Here

**OLD** -- 2002 Pontiac Grand AM Build Click Here
check them out, slap me a comment

2002 Pontiac Grand AM SE 2.2l 4 cylinder ecotec.
-------------------------------------------------------------------

Head Unit - Alpine CDA-9887
Subs - 2x Z 12 v.2s - v.3 + NS Soft parts
Amplifier - Sundown Audio SAZ-3500D
Enclosure - 3.33 Cubes tuned to 34.66hz
Front Stage - JBL P660c 6.5" Components
Rear Deck - Powerbass 4xl 6.5" Mid-Range
Front Stage Amplifier - Sundown Audio SAX-100.4D
Wires - Kicker Hyperflex 1/0, KnuKonceptz 1/0, Knu 4 and 8 Gauge, Kicker RCAs
Electrical - 275 AMP DC Power H/O Alternator, XS Power S3400, XS Power D2700
Videos - http://www.youtube.com/user/BeAILsTaR13
-------------------------------------------------------------------

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yea i dont want to use spray foam...its so permanent..and messy.and i cant get the sub any closer to the cabin without cutting into the rear deck/ trunk opening

dude thats not sealed off

and thats your problem

its not perfect i understand that but i shouldnt lose over 3 db.. do you really think if I were to sealed it off the remaining lets say 30% Id get my 3db back to where I was and then some..

Ive got some damp on the way as fox suggested and Ill use that on the deck. Otherwise what are yoursuggestions for improvement then?

Thanks

Setup:


2010 Hyundai Elantra


Factory Unit via 4 chan NVX LOC


Excessive Amperage "H/O" Alt


Xs D3400/ Xs XP3000


Big 3. 2 Runs of +, 2 Runs of -


DD M3b and 2 12" AQ HDC4s

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Share on other sites

That doesn't look sealed off lol, get some spray foam in that shit, you still have massive air finding its way into the cabin

I mean of course you could just spam foam everywhere, but what happens when you wanna change the box or take it out etc etc

Ive seen numerous people like "Gorilla tape and cardboard" apparently that approach is not ideal..

Setup:


2010 Hyundai Elantra


Factory Unit via 4 chan NVX LOC


Excessive Amperage "H/O" Alt


Xs D3400/ Xs XP3000


Big 3. 2 Runs of +, 2 Runs of -


DD M3b and 2 12" AQ HDC4s

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Share on other sites

And My trunk has those stupid swing arm style hinges.. if you fill the hole thing up with foam you wont be able to close/ open the trunk once it hardens..

Apparently I dont understand fully what it means to seal off the trunk, and before I did something drastic I would like to more or less have it down pat.

Ill be at work alll damn day

theres a 3x in elgin, il tommarow ill be there if anyone wants to check out my apparent leakage lol

Setup:


2010 Hyundai Elantra


Factory Unit via 4 chan NVX LOC


Excessive Amperage "H/O" Alt


Xs D3400/ Xs XP3000


Big 3. 2 Runs of +, 2 Runs of -


DD M3b and 2 12" AQ HDC4s

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Share on other sites

That doesn't look sealed off lol, get some spray foam in that shit, you still have massive air finding its way into the cabin

I mean of course you could just spam foam everywhere, but what happens when you wanna change the box or take it out etc etc

Ive seen numerous people like "Gorilla tape and cardboard" apparently that approach is not ideal..

I've seen plenty of sealed trunks, with foam, and the whole setup can be removed in and out...just has to be done right

And another thing, you want the box as far back in the trunk as possible, not close to the cabin, I've seen plenty of instances where every 1-2" moved back increased score by .5-1db per

Team Sundown Audio

**CURRENT** -- 2012 Scion tC Build Click Here

**OLD** -- 2002 Pontiac Grand AM Build Click Here
check them out, slap me a comment

2002 Pontiac Grand AM SE 2.2l 4 cylinder ecotec.
-------------------------------------------------------------------

Head Unit - Alpine CDA-9887
Subs - 2x Z 12 v.2s - v.3 + NS Soft parts
Amplifier - Sundown Audio SAZ-3500D
Enclosure - 3.33 Cubes tuned to 34.66hz
Front Stage - JBL P660c 6.5" Components
Rear Deck - Powerbass 4xl 6.5" Mid-Range
Front Stage Amplifier - Sundown Audio SAX-100.4D
Wires - Kicker Hyperflex 1/0, KnuKonceptz 1/0, Knu 4 and 8 Gauge, Kicker RCAs
Electrical - 275 AMP DC Power H/O Alternator, XS Power S3400, XS Power D2700
Videos - http://www.youtube.com/user/BeAILsTaR13
-------------------------------------------------------------------

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