Are you able to discuss how Hydra operates a valve circuit from Phantom Power?

The Voltages required to operate the valve and also the capsule polarization voltage are generated by a converter, we think it does a great job.
Noise levels there are equal to an equivalent circuit powered from battery operation, i.e. as noise-free as possible.
Next to this, we select only the best valves and also the tube circuit itself is as low noise as can be expected from a valve circuit.