Hi I am thinking of buying an SACD player to slot into my hifi system. I'll just be listening to 2 channels. Question: One of SACD's selling features is that information way above 20khz is there with the supposed benefits to the sound. I know we can't hear above 20khz, but the information is supposed to benefit the soud quality anyway. If the partnering Pre Amp's frequency response is only 20hz-20khz, what happens to the info above 20khz? Does it dissapear ? Can the pre amp be overloaded by this information ? I believe some SONY players have a filter to quell the over 20khz output for this reason Any input greatly appreciated. Many thanks Tom.