If the author ended with JA80 monoblocks, here few considerations based on my experience:
I have tried JP80 preamplifier with JA80 monoblocks with different cables.
First, I have to mention that I have had problems with ground loop with this setup.
Both preamplifier and monoblocks are factory equipped with IEC main socket and three wired power cords to in theory each unit should be connected to the outlet with grounded power cord.
Internally ground wire is connected both to metal chassis of the monoblocks and preamplifier and to the mass of RCS outputs and inputs.
When I connected preamplifier with monoblocks using standard interconnects and supplied three wired power cords I ended with ground loop and audible hum in loudspeakers.
Following Jadis recommendations I lifted ground wire of monoblocks power cord and left three wired power cords with preamplifier as the most sensitive unit of the bunch.
The ground loop gone. In theory the monoblocks are still grounded through mass wire of the interconnects and through preamplifier.
Honestly I am not sure is it is so safe solution, because in the worst scenario during short circuit in monoblocks the thin mass wire in interconnects can act like a fuse and break and leave the chassis of the monoblocks still live and dangerous. But the hum was not acceptable so something I had to do. The other alternative was to leave all power cords with three wires connected and use two Jeansen ISO-MAX CI-1RR isolators between preamplifier and monoblocks, but again I am not sure if such isolators not affect the transient performance.
So after managing the ground loops I started to try many interconnects between preamplifier and monoblocks. I found that interconnects with bad shielding catches all environmental trashes.
I was really surprised how good in this place performed long time forgotten Van Den Hull interconnect The Second. It is not so respected cable I audiophile marked and probably not the level of Jadis equipment, but it worked perfect. Very good shielding and balanced construction removed any unwanted noise or hum. The midrange was silky and sweet with detailed but not harsh treble.
Now I am considering to try other VDH products including very famous some time ago The Third speaker cables based on carbon fibers.