Hello!
I am new to this forum, and I just picked up a pair of fair condition JBL Hartsfield lately. I know the Hartsfield is limit on the high frequency and I am considering to add a supertweeter on the Hartsfield to extend the high end. However, I am not sure which supertweeter is going to track the character of the Hartsfield. These are the supertweeters I am thinking to put on the Hartsfield.

1) Decca DK30 Horm supertweeter
2) Tannoy ST-200 dome supertweeter
3) Sequerra T-1
4) JBL horn supertweeter made recently eg. UT045 Be

I have few more questions about the Hartsfield.

What is the frequency response of this speaker? Also what is the min and max impedance of this speaker? What about the sensitivity?

Is 2 watts Single Ended amplifier capable to drive this speaker?

Thanks in Advance!