gringo suave

i hook my laptop to a mixer thru the head phone out put, and then the mixer goes to the amp followed by speakers. but it always humms. i hook up my ipod and it doesnt humm only with the lap top

Snoopdogie187

You can try turning the laptop volumn down.
I havent found a solution to this yet actully, nothing easy.
I have a problem were if I have my external seakers hooked up to my laptop, they create a hum (the speakers do have a sub, not sure if that matters) and the speakers only do that with the laptop, and the laptop doesnt do this with normal headphones.

As far as I can tell, or me, it is a grounding issue. It will do it even when the laptop is muted or really low. I got it to go away when I hooked up a monitor to the laptop, doesnt have to be on, or even fully connected, as long part of the plug for the monitor is touching the outside of the port on the laptop for it.
It will also do this when the monitor is unplugged.
All I can think of is the laptop isn't properly getting rid of the electric and it is outputting it into anything it can (i.e monitors, speakers, etc.)
Also I had the speakers for a long time now (few years), laptop a year, and I use the speakers almost all the time, and havent had a problem yet.

(no saying you won't, and although I'm sure your set-up cost more, I don't want to say it will be safe for it, sorry)