Max interconnect cable length between 1000 Pro Amps

[Confused]

Audioprana make cables with a transformer, which might work over 3m? It might be worth checking with them, this would need to be a custom item as they are listed as 70cm in length.

http://audioprana.free.fr/catalogue%20ve...0ligne.htm

http://audioprana.free.fr/num%2075-110-buis.htm

http://audioprana.free.fr/75-110_origin.htm