now we all know that 6 seven inch woofers should produce alot of snappy , in your face bass..well my 12's do not produce great bass until i crank my reciever up to about -5db...before i got my second adcom i had my first one driving my bottom end of my speakers....still lacking in the bass ....when i got my other adcom and put them in mono and made my own jumpers out of 12gauge speaker wire..there was just a slight improvement in the bass....what am i doing wrong...i dont want to use my subs for 2 channel listning...i have my mains set to large and crossed over at 60hz...but even in pure direct mode they just do not pump until i raise my recievers dial to about -5db...any info would be appreciated