You can buy a Volex shielded 14 AWG cord from Allied or Carlton-Bates for less than $20. Chris VenHaus (VH Audio) offers his shielded "Flavor 1" for $115 and up (depending on which termination options you choose) with a 60-day return priviledge. Silver Audio WattMaster is also an option at $525 with a 30-day return option.
I certainly haven't compared these on a Trumpet so I have no idea whether more money would translate into better sound. You'll have to experiment.
I certainly haven't compared these on a Trumpet so I have no idea whether more money would translate into better sound. You'll have to experiment.