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I have sundown x12 v2 dual 4ohm wired to 2 ohms in a 2.5 cft box built to spec. Powering it is a kicker kxa 1600.1 rms @2 ohms . Gain is almost all the way down and there’s no clipping or distortion..... set it low to break subwoofer in for a week or two and then set accordingly with a SMD.

when I play at low volume I hear a rattle noise from woofer not knocking ..... is there a possibility that back of subwoofer is vibration against the box . There is supports inside for sub that’s why I’m questioning it . 

Also haven’t cranked on woofer yet I’ve  been going easy on it  


here’s a look at inside of box



Edited by Steve7384
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Aww ok, not sure what it could be.  I have had two amps go out and before they did they were sending a dirty signal that made the sub sound like it was rattling at low volume.  Hope you figure it out because that shit is annoying.

Sundown NSV4 18"  +  Sundown SALT-4 Baby

MechMan Elite 370a  +  XS3100 - XP3000

SHCA 1/0 OFC(blue+  SMD Fuse Holders(blue)

Pioneer AVH-2440NEX  SHCA Pro RCA 


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