small popping noises?

[rgnjc]

So I followed directions for installing an aftermarket head unit in my 2005 Vibe with the moon & tunes package from http://forums.genvibe.com/zerothread?id=30794I installed the Kenwood KDC-348U head unit. The sound is phenomenal, its very crisp and has good bass at high volumes. However, at all volume levels I'll occasionally hear a very low, almost imperceivable pop/crack. It isn't a big deal, but I want to get rid of it. Everything was wired correctly and I soddered my wiring harnesses together. What can be causing this? This is happening on all speakers (isolating each using the balance/fader). This headset is 50W x 4 channels. Could the headset be putting out too much power to the amp/speakers? I thought in the future I might try upgrading the speakers to see if that gets rid of these occasional pops. Any ideas?

[rgnjc]

It may be worth mentioning that if I turn the volume all the way down or pause my iPod I don't hear it, only when music is coming out on the speakers.

[rgnjc]

I found two ideas while searching the forums.First, somebody suggested to somebody else to make a direct ground line from the head unit. Would this help? If so, how is the best way to do this?Second, somebody recommends a Scosche noise filter. Does this affect sound quality/level at all, and would this help?Thanks,rgnjc

[VibeBear]

Noise filters are just a bandaid for a problem, usually caused by a bad ground. If you want to do a new ground for your head unit, take out the deck, find a bare metal spot in the dash, crimp a ring terminal to a length of wire & use a self tapping screw to secure the wire to the bare metal in the dash