MACKIE SRM 450

[djrae]

i got a mackie srm 450 i just bought a sub for it and every time i try tp connect the speaker wire from amp to speaker it gives me a spark .the high pass is fine its just with the low pass,do you no whats causeing this or what i need to do to fix this.

 

[soundguruman]

You DO NOT connect it with the power ON!
AND you are probably connecting it WRONG.