Vectosa, Transparent will reconfigure the networks of your XL V to XL SS free of charge if you are the original owner which you should definitely do. It makes a big difference. They will want to know your amp and speakers so they can precisely match the impedance. It is much more the differences in input and output impedances between SS and tube equipment that would limit your cable's performance than any inherent "harmonic spectrum" issues of the amps.
You could certainly use XL V with your new amp but you would be limiting its performance.
You could certainly use XL V with your new amp but you would be limiting its performance.