Originally Posted by
Barry
As has been commented elsewhere, whilst you cannot directly hear frequencies above 20kHz (unless you are asthmatic), and this falls to ~10kHz for the over 60s, you may be aware of supersonic information in the harmonic spectrum of instruments. Tannoy themselves market a supertweeter operating only above 10kHz, and higher.
tweeters
I see no harm in experimenting with these piezoelectric supertweeters. Just "suck it and see".
My own preferred solution would be to use a dedicated headphone amp with a 5W resistor of a few Ohms wired in series with the piezoelectric tweeter. Using a 10:1 step-up transformer will cause the capacitance of the load, as seen by the amplifier, to be increased by a factor of 100.