(creative 4.1)
Past 6 yrs I kept the monitor on the sub woofer using a wooden base to balance it & operated my cpu right next to it...................... it worked flawless except that I could not turn volume to full as it started to shake the base due to vibration.
Most modern speakers are shielded well & so is the case with monitor & other things which have magnetic field.
Now when I have a seperate room & a cabinet where the same woofer is now on the floor, I enjoy the same music using 4 speaker & 1 woofer but now with heaveier bass.