Can you explain the difference on left and right set of speaker taps on the monos.
since the very beginning, I've always run 2 separate pairs of speaker cables to my Sony SS-M9EDs.
they simply sound better that way compared to using the supplied jumper plates.
i never bothered to experiment with jumper cables because the speakers' designer himself said and reiterated that these speakers were designed/optimized with separate runs of speaker cables.
on the x350 and x350.8, connecting 2 sets of spade terminals from 1 single set of output terminals is not very easy.
some twisting on the thick cables are necessary.
luckily, both the straightwire crescendo grade and serenade grade speaker cables came supplied with relatively thin spade connectors.
but on the sony ta-n1 power amp, it's output terminals are only accessible from the plastic housing openings at the top and the bottom, so it required 1 pair of speaker cable to enter from the bottom, and the other pair to be twisted and entered from the top.
(the sony ta-n1 power amp does come with 2 pairs of speaker output terminals, but it will only sound good when only 1 pair of output terminals are used. when both pairs of output terminals are used for separate runs of cables to a bi-wirable loudspeakers, somehow the sound become worse - flat soundstaging and lean bottom end. I also experienced this on many av receivers and power-amps. if they have got A and B 2 sets of output terminals, only 1 set will sound good, either A or B. When both sets of terminals A+B were used, the sound became lean and sterile. soundstaging became flat, and overall sound became utterly non-engaging.)
to overcome the congestion and avoid having to twist 1 pair of the serenade cables too much i had them re-terminated into banana jacks. so on the sony ta-n1, 1 pair of speaker cables were connected via its original spade, and the other pair were connected by the banana jacks. Sounds more relaxed that way.
a short while ago, i have had to change the pair of banana'd Serenade cables to spade terminals again in order to use the X350.
the new terminated spade is twice as thick, but still i was able to connect both pairs with a little bit more effort.
on the xs150 now there is some problem.
there is some transparent plastic housing materials between the base and screw portion of the output terminals
the plastic housings only allow spade terminals to be entered from the top and bottom, and not anywhere else.
entering from the side and screwing down will damage the plastic housing.
so it was with a little bit of trepidation that i use the 2nd set of the output terminals on the xs150 for the 2nd pair of speaker cables.
i anticipated that the sound might thin out and become horrible based on my past experiences with other amps.
No!
the sound was great! I don't hear any of those sonic problems that i've experienced with other amps when both sets of their output terminals were being used.
somehow these pass labs monoblocs are designed differently.
it sounds perfectly ok to use both sets of output terminals to run 2 separate runs of speaker cables to bi-wirable loudspeakers
fantastic!
i'm loving the sound.