Well folks, through my little Gateway speakers made by you know who, at full volume from three feet, 15khz. That's it.
I thought I could hear some of the higher tones, but that was just my ringing in the ears, 'cause I kept hearing it after the tone stopped. 62 years next month, many years of live music, loud hifi, and 15 months of 24 hr artillery & helecopters in 'Nam has taken its toll. Guess I didn't need to add those tweeters after all.