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Help guys!


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My subwoofer is port back sub up, and when I drive, the box literally flexes up and down. Yes, I have top to bottom bracing, but this is the WHOLE box moving. I have an l-bracket in the back and front of the box but it still moves..

What should I do?

2007 M/T Honda Civic Coupe EX

(4) Sundown Audio X-8's

(2) Ampere Audio 3800.1's

(3) Stinger SPV-44 Batteries

(1) Mechman 240

3:1 Ratio 4th order sealed from the trunk

TEAM NWSPL

Best termlab scores to date in Honda trunk:
151.7db legal (official) IASCA trunk 3 class

Best termlab scores to date in my walled Subie:
152.9db legal (unofficial) IASCA advanced 2 class
155db outlaw

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Any ideas from guys that have subs with epic motor force? Lol..

2007 M/T Honda Civic Coupe EX

(4) Sundown Audio X-8's

(2) Ampere Audio 3800.1's

(3) Stinger SPV-44 Batteries

(1) Mechman 240

3:1 Ratio 4th order sealed from the trunk

TEAM NWSPL

Best termlab scores to date in Honda trunk:
151.7db legal (official) IASCA trunk 3 class

Best termlab scores to date in my walled Subie:
152.9db legal (unofficial) IASCA advanced 2 class
155db outlaw

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I could be wrong, but i would put another baffle on it

I used plenty of bracing when I made the box, so I didn't include a double baffle. An I just painted it. It would be a huge pain to add another baffle.

2007 M/T Honda Civic Coupe EX

(4) Sundown Audio X-8's

(2) Ampere Audio 3800.1's

(3) Stinger SPV-44 Batteries

(1) Mechman 240

3:1 Ratio 4th order sealed from the trunk

TEAM NWSPL

Best termlab scores to date in Honda trunk:
151.7db legal (official) IASCA trunk 3 class

Best termlab scores to date in my walled Subie:
152.9db legal (unofficial) IASCA advanced 2 class
155db outlaw

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Share on other sites

use L brackets to screw the box as a whole, down.

'08 Chevy Cobalt coupe 2.2 base model trunk build:

2 9512iSC flatwound alum 1.5 coils

-extra 9500 spider pack

-8" platinum carbon dustcaps

1 DD Z1 (.375ohm nominally daily)

3g31 AGM

320a Ohio Gen alt

1 DD S4 4 channel

4 VO-M8v1's (holes cut for 3rd pair)

2 CS 6.5's

2 VO-B1's

Sony XAV-601BT

all Knu Krystal RCA's

Cadence 7band EQ

______________________

148.3db @ 32hz (burp)

148.4 @ 37 & 38hz (burp)

146.xdb 90sec average (center windshield)

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use L brackets to screw the box as a whole, down.

I'm already using them.

Maybe the floor of my hatch isn't steady enough? Because it has the plastic false floor that seperates the box from the spare tire well..

2007 M/T Honda Civic Coupe EX

(4) Sundown Audio X-8's

(2) Ampere Audio 3800.1's

(3) Stinger SPV-44 Batteries

(1) Mechman 240

3:1 Ratio 4th order sealed from the trunk

TEAM NWSPL

Best termlab scores to date in Honda trunk:
151.7db legal (official) IASCA trunk 3 class

Best termlab scores to date in my walled Subie:
152.9db legal (unofficial) IASCA advanced 2 class
155db outlaw

Link to comment
Share on other sites

use L brackets to screw the box as a whole, down.

I'm already using them.

Maybe the floor of my hatch isn't steady enough? Because it has the plastic false floor that seperates the box from the spare tire well..

thats probably why :P

the false floor doesn't allow the screw to actually attach to anything that will hold it steady xP

'08 Chevy Cobalt coupe 2.2 base model trunk build:

2 9512iSC flatwound alum 1.5 coils

-extra 9500 spider pack

-8" platinum carbon dustcaps

1 DD Z1 (.375ohm nominally daily)

3g31 AGM

320a Ohio Gen alt

1 DD S4 4 channel

4 VO-M8v1's (holes cut for 3rd pair)

2 CS 6.5's

2 VO-B1's

Sony XAV-601BT

all Knu Krystal RCA's

Cadence 7band EQ

______________________

148.3db @ 32hz (burp)

148.4 @ 37 & 38hz (burp)

146.xdb 90sec average (center windshield)

Link to comment
Share on other sites

use L brackets to screw the box as a whole, down.
I'm already using them. Maybe the floor of my hatch isn't steady enough? Because it has the plastic false floor that seperates the box from the spare tire well..
thats probably why :P the false floor doesn't allow the screw to actually attach to anything that will hold it steady xP

This. Or maybe the bracing snapped inside?

2010 F150 FX4
-18" AA Mayhem
-Crescendo BC3500d
-Pioneer GM-D9500F 4-channel
-2 Crescendo FT1

-2 Crescendo Neo Forte 6.5

-Pioneer AVH-P3300BT
-6000K HID Headlights/Fog lights
-All LED interior lighting
-20% tint on front windows, 1% rear windows, 5% windshield strip
-Big3 (XSFlex 0ga)

-DC Power 270XP

-Group 65 NorthStar AGM battery

Coming soon/plans:

-Build log
-Blacked out mirror reflectors
-Tinted tails/3rd brake light

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use L brackets to screw the box as a whole, down.
I'm already using them. Maybe the floor of my hatch isn't steady enough? Because it has the plastic false floor that seperates the box from the spare tire well..
thats probably why :P the false floor doesn't allow the screw to actually attach to anything that will hold it steady xP

This. Or maybe the bracing snapped inside?

Nope, bracings good. I'm thinking it's the false floor jumping. What can I do to secure it?

2007 M/T Honda Civic Coupe EX

(4) Sundown Audio X-8's

(2) Ampere Audio 3800.1's

(3) Stinger SPV-44 Batteries

(1) Mechman 240

3:1 Ratio 4th order sealed from the trunk

TEAM NWSPL

Best termlab scores to date in Honda trunk:
151.7db legal (official) IASCA trunk 3 class

Best termlab scores to date in my walled Subie:
152.9db legal (unofficial) IASCA advanced 2 class
155db outlaw

Link to comment
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