i have 2 12 jl wos on a spl series 2 zx2-820...i have them bridged,bumps hard...but when i cut the bass boost switch on on the amp the subs start makin this noise....like bass waves or something...vwvwvwvwvwvwvwvwvwvwvwvwvwvwvwvwvwvwvw????????????? can someone help me tell me something im doin wrong?