Al, after having the Mac amps off all night, the sub is still making the hum noise.
the AC plugs on the Mac amps are 2 prong polarized. reversing them using a non-polarized cheater plug did not change the hum at all. one thing i did notice is that if i touched the banana terminals at the Mac amp, the hum got louder, but if i touched the banana terminals at the sub amp, the hum went away. not sure if that's meaningful.
there are inputs for both the left and right channel on the 2W sub amp, and i am only using one, leaving the other open. i switched to the unused input, but that didn't change the hum. i thought perhaps using only one input on the sub might be causing this, but according to the manual, when stereo 2W subs are in use, they are connected using just one input.
regarding the resistor - sorry for the rookie question, but do i just insert the leads into the inputs on the sub amp, then insert the banana terminals on the speaker wire along with them? the amp on the sub can only accept bananas. also, i assume since i'm only using one input, i only need to add the resistor to the input in use?
thanks,
Scott
the AC plugs on the Mac amps are 2 prong polarized. reversing them using a non-polarized cheater plug did not change the hum at all. one thing i did notice is that if i touched the banana terminals at the Mac amp, the hum got louder, but if i touched the banana terminals at the sub amp, the hum went away. not sure if that's meaningful.
there are inputs for both the left and right channel on the 2W sub amp, and i am only using one, leaving the other open. i switched to the unused input, but that didn't change the hum. i thought perhaps using only one input on the sub might be causing this, but according to the manual, when stereo 2W subs are in use, they are connected using just one input.
regarding the resistor - sorry for the rookie question, but do i just insert the leads into the inputs on the sub amp, then insert the banana terminals on the speaker wire along with them? the amp on the sub can only accept bananas. also, i assume since i'm only using one input, i only need to add the resistor to the input in use?
thanks,
Scott