The various producst of harmonix reportedly, and accoring to my experience, are tuned to darken a bit the sound-print of a system. Try various combination of them, like tuningd discs, room tuning devices, ics, loudspeaker cables an dpower cords. Also, might be very effective the use of acoustic system resonators. They really effectively altereting the sound of a system, but you have to find the right combination to get the expected results. If there is a local dealer, give a try. They would come to your flat with a set of resonators and would set up a trial combination.
