humm from my amps

[MTXmainman 10+ year member]

doesnt that occur when you run the RCA's and the powercable to the same side of your vehicle? so you might check that possibility

 

[joetama 5,000+ posts]

Well, get one of those little two to three plugs and put it in line with the amp. If it stops then try these things... Are you using XLR or 1/4" inputs?

http://www.milestek.com/SHOP/PRODUCT.ASP?ID=90%2010208

http://www.markertek.com/Product.asp?baseItem=AV-HK1X&cat=AUDIOEQUIP&subcat=AUDINT&prodClass=IMP&mfg=&search=0&off=