Hello,
Jeff here,
Yes, I owned P-20s and one time, and then P-22's. I don't recall much that would be helpful to share about P-20s, sorry.
The P-22 was the last Premiere design Bob did. This had been designed after Bob started using his TEKTRONICS 2 GIG scope to look at audio events, and the Premiere.
A P-22 was an absolute BEAR to tune properly. Everything had to be 100% right feeding the speaker, and back then, there were too many equipment variables that would lead us astray. ( A P-22 "assumed" a perfect front end and amplifier... Ha Ha, OMG ).
So, I had a HARD TIME getting a P-22 to tune into the room and to play consistently, it was super-sensitive to get it to lock into optimal balance, even with all my years of FMI speaker adjustment experience.
I eventually ( on 9-13-1991 ) re-modded my P-22 back to a slightly more forgiving P-12 circuit, and never told Bob I did that !!
Take your time and have fun. Email me privately if you have more questions.
I never ever saw or heard of a FMI-120 till I saw this mentioned in this thread. Would love to hear a pair.
I am mostly involved in high efficiency speakers that will use low powered DC SET amps these days. To this day, audio amplifiers are the weakest link in the whole audio chain in my personal opinion !!! Most amplifiers are a travesty.
Jeff Medwin .... aka... Drlowmu