1200W+ AMPS SENDING DC TO SPEAKERS, I need help Options

[Kamakaze]

Ive done a few installs and Ive seen this problem about 4 times, where the amplifer sends out DC to the subs and ends up burnin out the sub. Ive tried alll i can think of but heres my history.


1st It was a KICKER 650 amp with Kicker L7 subs
-----changed the amp out to a Swiss Audio AmP, this was a much bigger amp and it sent even more DC voltage.
-----then changed a Pioneer4800 headunit to the pioneer N3 (that didnt solve anything
Then I decided to change out the subs (since those got burnt out) and added two L7's) still a problem so i left that project alone before i blew those too.

Next car had the same KICKER 650 amp with an L5 sub
------the subs got burned out so i changed the amp to a Kenwood 1800W that kenwood jus wasnt working period, took it backk and got another one and this one is now sending DC

if anyone has a solution please let me know ASAP.

[Hanyo]

fried subs can be from alot of problems. Runing too low of an ohn subwoofers. Or maxing out your amps limit causing them to clip and blow either the amp or the subs.

Do you turn up your system alot? I've rarely see subwoofers and amps burn out under everyday use.

you got to give us more info on how each set up was installed. Paralled speakers, cross over... ect