Talk to the dealer. Whenever the tonearm tracks a warp - up the leading edge and then down the trailing edge - the stlyus is pushed out of its proper position and the tonearn is excited into resonance. You should notice the woofers in your speakers bobbling in and out in response to this warp resonance. That is wasted power from the amplifier responding to subsonic information and just as with the stylus the same situation occurs with the driver which is not seated propely due to the movement excited by the warp resonance.