Not if it's in the wall and not removable.
The best option is metal conduit, because it's shielded and so less likely to radiate hum. BX is second best, for the same reason. Stranded vs. solid doesn't matter, except insofar as stranded is easier to manipulate in heavy gauges. Gauge does -- the thicker the wire, the less voltage drop. As someone pointed out, wiring heavy gauge wire to a standard receptacle can be tricky. Agree that you shouldn't use the Belden, which would violate code.
The best option is metal conduit, because it's shielded and so less likely to radiate hum. BX is second best, for the same reason. Stranded vs. solid doesn't matter, except insofar as stranded is easier to manipulate in heavy gauges. Gauge does -- the thicker the wire, the less voltage drop. As someone pointed out, wiring heavy gauge wire to a standard receptacle can be tricky. Agree that you shouldn't use the Belden, which would violate code.