It is nice to see here good European products. Our company is an "old user" of PKN, mainly their XD and XE series amps.
We do not have 3PHASE in our stages because it would be overkill in
power but heard about highest
level of good things about it from friends.
As I saw it has a military-grade circular
connector for the AC input with break-before-make feature so No arcing is possible, I mean the
unit draws
current only after connected
and stops
current before
disconnect. While the XE and XD devices have standard
Neutrik Speakon outputs the 3PHASE models have the "rugged type of NLT4M" Speakon.
It can do similar
Voltage levels like other amps in bridged mode ~180Vrms per
channel which is a pretty nice value for good
headroom.
I measured one of our XE6000 which was able to make ~130Vrms on 8R so fits to the ratings of standard Speakon. Anyways tons of instructions written to the backplate but I do not think it would confrom to the US requirements
Also it is much better to run amps on higher
Voltage than US 110V.
They have a technical paper about the
power supply, may written in not so good english but the graphs say all..
http://www.pknc.com/3phase/3phase_PSU.pdf
How understands basics of electronics will see this thing is lightyears more advanced than anything else.