electricity running through speaker termi

i have an audiobahn a2300hct amp.. it has two channels and when i plug speaker wires into the left channel it works fine. the positive terminal of the right channel works also but when i plug anything into the negative terminal of the right channel the subs jump and pop and sparks go everywhere.. help! im sure this is a basic mistake but i just cant figure it out. Pioneer Avic D3

Rockford Fosgate T15004

Rockford Fosgate T20001BD x 2

15" Fully Loaded Fi BTL x 2

6" Eminence Alpha Mids x 16

Eminence APT-80 Tweeters x 16

260 Amp Iraggi alt

Kinetik 2400 x 3

Sounds like a bad right channel on the amp. Put a meter on it and see if you are getting DC current through it.

and what if it is? what can i do to fix that? and it has worked before without the sparking Pioneer Avic D3

Rockford Fosgate T15004

Rockford Fosgate T20001BD x 2

15" Fully Loaded Fi BTL x 2

6" Eminence Alpha Mids x 16

Eminence APT-80 Tweeters x 16

260 Amp Iraggi alt

Kinetik 2400 x 3

You can get it repaired or replace it.  You can look at it as a great time to upgrade.My ex once told me I have a perfect face for radio.