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DSS ethos 18 help!


sbg

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So I just went from a FI sp4 18 in 5cuft tuned to 37 with 80 " port area,

To a 18" DSS ethos in 6cuft tuned to 32 with 88" of port. And am having a problem in a few ways , first off its like 1/2 as loud. 2nd it's making a sound like it's bottoming out. Is 6 cuft to big?

Power is 2 synergy audio wfo 15.1. Clampped 4600 put out of them On the term lab last time I went to a comp

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

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What's your SSF set to? And have you done sweeps to figure out around what freq it's acting up?

Ssf is set to around 20hz, seems to be be around tuning that it's bottoming out.

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

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Share on other sites

Around tuning its highly unlikely its bottoming out, since excursion it at a minimum around that frequency. However stress on the box is at its highest, so it might be something has come loose in your box somewhere, that's often what causes these kind of noises.

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I was told that the 6cuft box I built for this sub is to big, that for my power and that sub it should be in 4 -4.5

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

Link to comment
Share on other sites

Around tuning its highly unlikely its bottoming out, since excursion it at a minimum around that frequency. However stress on the box is at its highest, so it might be something has come loose in your box somewhere, that's often what causes these kind of noises.

I will have to look the box over but I'm,pretty sure it's the sub

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

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Share on other sites

I would put the dss in the box the sp4 was is

I'm going to do that tomorrow and see what it does. Its crazy for real it's like 1/2 as loud as the sp4

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

Link to comment
Share on other sites

You should double check the the box to make sure there isn't any loose bracing or panels. Like Triticum implied, you might have parts slapping together as the box resonates.

Yep going to check today, the box has about a gal of fiberglass resin inside over all parts.from the put side the don't don't flex at all

01 focus se

110 amp alt

Big 3 sky high and stinger hpm ofc 1/0

Super start platinum AGM (starting)

2 runs of 1/0 Execution audio front to back

Kenwood double DIN DDx271

A pillars- orion 4" super tweeter and 2-1" alpines.

Orion xtx 64 in the front doors

2:1 4th order bandpass

Sealed off trunk

Digital designs deadener on roof/ rear deck

Orion hcca 12s (black coils)

Orion xtr3700.1

Orion xtr250.2 mid/highs

All sky high 1/0 in trunk dual runs(power/ground)

Sky high dual 1/0 inputs

2 xs power D3100 in back

Sky high batt blocks

Rose audio batt blocks

Stinger volt meter

All sky high 1\0 fuse and holders

Db link remote/ rca

Link to comment
Share on other sites

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