in my ears theres no doubt the supertweeters are worth the money(from what ive heard in some systems). but,- theyre supposed to take over for the standard tweeter where it cant go higher. what if the cd player and amplifier cant produce the over 20000hrtz "normal" range? ive only seen some cd players do this, where it says from 15-100000hrtz or so. my cd player and amp says 20-20000. does that mean a supertweeter will not do any good in my system?