HDC3 18 making popping noise.

[djtomczak 5]

At high volumes my 18 makes a hollow pop sound. It sounds like someone is flicking the dust cap of the woofer but louder. First I thought bottoming out, but it happens at frequencies where there is not high excursion. This problem also happened on my sa12s I had previously. So now I'm thinking it is my amp, but why would the amp make such a noise? Any ideas?

Coils read good, no clipping, constant voltage.

Edited June 8, 2012 by djtomczak

[Dangrebel 89]

Man I have hdc3's. They've only popped like what you say on clipped kick drums. I hear it right at the center of the cone.

[djtomczak 5]

It happens on most of my demo songs, which I have looked at and they have no clipping. Kind of ruins the demo when your subwoofer is popping...

[jonbearsmt 919]

how big is your box,

how much power,

where is your SSF set.

[djtomczak 5]

Box is 7 cubes after displacements at 35hz. No ssf. Last checked out at 1780 watts.

[An-i-no 86]

Air leak maybe? Does it do it at lower volumes?

[djtomczak 5]

Nope, only high volumes. Box is leak free as well. I turned the amp down a tad and it no longer makes the noise, but I would rather have it as loud as it can go. The volume change is noticeable.

[jonbearsmt 919]

the box seems a bit large to me.. i like around 6 cubes, for higher power... but im not sure about that sub....

your demo songs are LOW right??????

no SSF is your problem IMO.

[An-i-no 86]

Ah! I just saw that...what frequencies is the noise happening at? Could be unloading. I know people say HDC's are made to play below tuning but...if you're at almost double rated power without a SSF then that could definitely be an issue.

Did the SA's have an SSF?

[jonbearsmt 919]

its a combo of issues...

too much enclosure volume for that amount of power, with no SSF, will no doubt cause this issue every time.. no doubt.