B&K 130V mic input option. For DPA 4003, 4004, 4012 and 4016. Available on all preamps. Adds 4-pin XLR B&K (DPA) high voltage inputs to rear panel. In addition to standard 3-pin phantom XLR input. Per input.
DC input option. Available on all preamps. Adds direct DC-coupled input for dynamic & ribbon mics. Improves sonic performance with all dynamic microphones. In addition to standard 3-pin phantom XLR input. Priced per input.
High resolution gain switch. Option available on older model HV-3B only (Hi-resolution gain is standard on HV-3C and HV-3D). Increases gain resolution to 1.5dB per step, with 36 steps. Priced per switch