Any JBL 1400 Synthesis Array owners

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Yes, the dynamics are really fantastic.
I can't believe that there is not more interest in this speaker. I have not heard anything I like better yet, and I have been at this for awhile. The compression drivers, once heard, are impossible to deny.
I am interested in your experience with the tube amps and the 1400s. What is the minimum power you have gotten by with? What do you find lacking and what do you find engaging?
As for the Pass gear, audition it. I think you will find this to be a great match.
There is plenty of nuance and plenty of realistic dynamics. I like the power.
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I am using a 70 wpc tube amp which seems to be coasting. I have tried EH kt88 and Gold Lions, more detail with EH, more body and warmth with GL. I like both. Next week is the 90wpc V-Caped Quickies. After that, 100 wpc MFA TRIODES. Bass with the tube amp is very deep, controlled, and dynamic. Damping factor is 11-12, same as the Quickies. Silver cable is used. I may upgrade the gold binding posts and use biwired cable or try 4 Quickies at 180 wpc of tube power. So many options. I may go with Silver Rhodium posts or Eichmann posts. PT

With a 70w tube amp I doubt you are hearing the full extent of bass extension and power that these very good loudspeakers are capable of.

One of the members of our audio club (Las Vegas Audio Club) has a pair of these, they sound great! The amps: 1000 W Crown industrial amps. I heard this system cranked. You'll be picking your jaw up off of the floor.

I have the JBL S4700s, which are, for the most part, equivalent in sound to the 1400 Arrays, and there might be something to using high powered solid state amps with these very efficient speakers. I'm looking at the Accuphase A-70, which is a Class-A lower powered amp, but can drive very low impedances. It drove a pair of very insensitive Magico speakers @ CES 2015 with no problem at all. But that Pass Labs X350.5 and .8 has gotta be one of the best, if not the best high powered stereo A/B amps out there...I would get that over the Bryston, but the Bryston is a good choice too, and it's a bit cheaper as well...

If you wanna go Bryston, then get the 4B SST2. That's what I use (actually the older SST model) at the present time with my JBLs. I haven't got it to clip yet. Another idea is to bi amp with tubes on the mids/highs, and solid state on the bass. But that needs to be carefully done. It's a bit tricky.