Sub Rattle

[WVRam06]

Did some new front fire subs under the front seats this weekend. Sounds good. While re-tuning one of my subs under make back seat has a rattle sound, not playing clean. Almost sounds like something is on the sub and rattles, only way to explain it. The other three subs sound great. Any ideas?

[SPLaudio]

remove sub from the enclosure and play freeair. could be not sealed tight in the box,leaking dustcap, lead slap or almost anything...

[Hookedup12]

I would check the enclosure, my sub was sounding funny but it was just because the terminal cup was cracked and was giving my sub a weird sound I took it out and it's seemed to fix it.

[WVRam06]

Never thought of that. I have had problems with terminal cups in the past. I love ported boxes but only so much you can do in a truck and keep your space so I settled for sealed boxes. I went cheap and purchased some Pyle terminal cups a few years back and they are junk. They leaked bad where the terminals passed through the plastic towards the sub. If I am not mistaken these were junk too. Something to check.