4
HV-3C
voltage mic input option, a fully balanced audio path, enormous non-padded input and output
headroom, superior technical specifications, world-class internal componentry, optional A/D
conversion, and unparalleled sonic performance, the HV-3 series of microphone preamps is
already becoming a true classic in the professional audio industry — and will remain contempo-
rary well into the next century. Hence, Millennia Media.
HV-3C REAR PANEL
(1) CONVENTIONAL MIC INPUTS "48V IN (Ch 1 - 2)"
Conventional 3-pin female XLR input jacks for use with all conventional balanced microphones, both
phantom and non-phantom powered. Provides +48V Phantom powering. Standard input impedance is
approximately 6,200 ohms. Pin 1 is ground. Pin 2 is positive polarity. Pin 3 is negative polarity. Connec-
tor contacts are Neutrik gold and Super C plated. It is suggested that XLR cable connectors used with the
HV-3C employ identical plating.
(2) HIGH VOLTAGE MIC INPUTS "130V IN (Ch 1 - 2)"
Four pin female XLR connector for use only with B&K (DPA) models 4003, 4004, 4009, and 4012
microphones. On HV-3C units without this option, a metal plate will cover the unused XLR holes. Pin 1
is ground. Pin 2 is not connected. Pin 3 is +130 Volts DC power, and pin 4 is unbalanced audio signal.
Connecting anything other than the above listed B&K (DPA) models to this connector may result in seri-
ous damage to microphone, the HV-3C unit, or both. Connector contacts are Neutrik gold and Super C
plated. It is suggested that XLR cable connectors used with the HV-3C employ identical plating.
(3) LINE LEVEL OUTPUTS "OUT (Ch 1 - 2)"
Conventional three pin male XLR connectors providing balanced, line level microphone output. Pin 1 is
ground. Pin 2 is positive polarity. Pin 3 is negative polarity. The line level output is capable of driving 600
ohm loads and long, high capacitance cables. Outputs may be configured in an unbalanced configuration
by either grounding one of the audio polarities (pin 2 or pin 3), or taking one audio polarity directly as
an unbalanced signal (recommended). In the former configuration, the output is automatically increased
by 6 dB. Connector contacts are Neutrik gold and Super C plated. It is suggested that XLR cable connec-
tors used with the HV-3C employ identical plating.
(4) AC VOLTAGE MAINS SELECTION "100-120" or "200-240"
A power entry module with a removable fuse holder block. This fuse holder block is selectable for 100 to
120 Volt or 200 to 240 Volt worldwide mains powering. The fuse block contains two fuses — one fuse is
in series with the hot power line while the other fuse is in series with the neutral power line. Both fuses
must be installed. To change the mains voltage selection, remove IEC power connector and assure that
the HV-3C is not connected to mains power. With a non-conductive tool, gently pry the fuse block away
from the power entry module. Remove the two fuses and replace both with type as shown below. Ori-
ent the fuse block so that the proper voltage is shown and reinsert into the power entry module. Double
check that the fuses installed correspond to the AC mains voltage range which is shown on the exterior
panel. Gently push the fuse block back until flush and snug.
FUSES:
For 100-120 VAC mains use 5 x 20 mm,500 mA, slow blow, 250 V, Littelfuse 218 or equiv.
For 200-240 VAC mains use 5 x 20 mm, 250 mA, slow blow, 250 V, Littelfuse 218 or equiv.
(1 pages)
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