Interference

yep, try plugging them in different wall plugs. so monitors in one, laptop in another. (and i mean wall plugs, not other plugs on the same stekkerdoos/multiprise)

Tried that alrdy, seems like the noise is less then, but still there. It's weird cause if I move my mouse, you can hear that in the noise :p.

try to put each on a different electrical group/circuit. you might have to use extension cables to get to another room. the problem you have is a ground loop:http://en.wikipedia.org/wiki/Ground_loop_(electricity) & http://www.epanorama.net/documents/groundloop/index.html

btw, it's a common problem with laptop power adapters

what might also help is to fully strech out the wires attached to the transfo of your laptop. I mean dont keep them nicely wound up and bound together. That makes a sort of coil which produces a small electromagnetic field. (the same happens in the transfo itself. it is 2 coils of cupper)

So maybe reducing any unnessecarry coils could help....

Indeed try plugging the speaker and the laptop in different circuits (different rooms mostly as each room usually has its own circuit...) also, do not use a circuit with motorpowered householdgear such as refrigerators or wachingmachines.

Ok so I connected my adapter with an extension cable to another room, and the noises are reduced to a low level, but still there.

Are shielded cables a solution to fix this completely? Cause this extension cable running through the house isn't really 'handig'. Or if someone else has a better way to solve this, I'm open for all input :). And thx for the answers you guys gave me, already helped me :).

Originally posted by : introder

Ok so I connected my adapter with an extension cable to another room, and the noises are reduced to a low level, but still there.

Are shielded cables a solution to fix this completely? Cause this extension cable running through the house isn't really 'handig'. Or if someone else has a better way to solve this, I'm open for all input :). And thx for the answers you guys gave me, already helped me :). if the noise is still there it means those 2 plugs are still on the same electrical group. shielded cables won't help because the interference comes from the power supplies/connections (unless you have your audio cables close to power cables/supplies and stuff), as you can read in those articles above.

that s a ground loop, what you can do is modify your stekkerbox so that your laptop isn t grounded.

Originally posted by : strekie

that s a ground loop, what you can do is modify your stekkerbox so that your laptop isn t grounded. 

a laptop is never grounded i think. to avoid groundloops you need a symmetrical line of which the zero-line (groundline) isn't connected on both sides (for example: only on the send-side you connect the ground-line of your cable). but i think you have the same problem as with all other onboard-soundcards. what you need is an external soundcard (usb or firewire), so the analogue sound isn't routed thru the laptop.

An external soundcard can be the solution, and I was already thinking of buying one, so... .

Anyone can give me some advice about some soundcards? I think m-audio has some good ones, but maybe there are same/better alternatives? ( If there's already a topic on this, I can't find it :p. )

Originally posted by : introder

An external soundcard can be the solution, and I was already thinking of buying one, so... .

Anyone can give me some advice about some soundcards? I think m-audio has some good ones, but maybe there are same/better alternatives? ( If there's already a topic on this, I can't find it :p. ) there's many different types and brands... usb/firewire, number of inputs & outputs, mic preamps, digital connections, etc...

i use a motu 828mk2. very good but probably overkill for most software producers. maybe the smaller version is something for you: motu ultralite.