rockford fosgate punch 45 help

hi i have a punch 45 hd and the left side started to be wierd and and fuzzy and than it completly stopped working but the right side works fine so i dont know what the deal is.

and one more thing i heard once you can take a punch 45 and piggy back the amps to make it more powerful if soo how do you?

thanks

that channel just blown.and they can be modified for better power handling. it takes a little know how of circuits.

i have another 45 for parts what could i switch to get that fixed if anything?

its not good to use many parts from other amp. i would get them both rebuilt. it shouldnt be that much.