I've been listening to some stuff today.Yamaha A-S700 amp with soavo 1 speakers(to 50 khz),also with ns-333 (to 35 khz) and with kef iq10 (to 40 khz).After some switching between speakers I really had the feeling that high frequencies were very tiring.Soavo's were not that great,just more bass than the ns-333. IQ10's were good ,just need a little more bass.Anyone with extended range speakers?Impressions?