Td -1 rear p anel rear panel – Millennia TD-1 Twin Topology Half Rack Recording Channel User Manual
Page 11
TD-
Twin Direct
2
0
TD
-1 REAR P
ANEL
REAR PANEL
MICROPHONE INPUT “HV-3 MIC IN”
Millennia’s HV-3 microphone preamplifier is a world standard in classical
and critical acoustic music recording. Used to record well over half of all
major Hollywood film scores, chosen by countless recording and touring
artists, employed by numerous microphone manufacturers for research
and development, and found in more symphony and opera halls than any
other — we believe there is no better choice when musical reality and
dynamic uniformity are sonic priorities.
HV-3 input is a conventional 3-pin female XLR input jack for use with all
standard balanced microphones, both phantom and non-phantom pow-
ered. Provides +48 Volts DC Phantom powering via front panel switch.
Input impedance is approximately 6,200 ohms with phantom power
switched in.
Microphone Input shares the same internal signal path as the balanced
line level (front panel) input but is not designed as a mixing path. For opti-
mal performance when line input is in use, disconnect microphone, and
visa versa. To achieve a signal path that is identical to Millennia’s HV-3B,
HV-3C, or HV-3D units, use the active balanced line output (Main Output
#1, below).
Pin 2 is positive polarity. Pin 3 is negative polarity. Connector contacts
are Neutrik gold plated. It is suggested that XLR cable connectors used
with the TD-1 employ identical plating. Maximum microphone input
level is +23 dBu. For reference, a Neumann U87Ai directly in front of a
screaming vocalist (127 dB SPL) will output approximately -6 dBu.
TRANSFORMER-COUPLED (GALVANIC ISOLATION) BALANCED OUTPUT
Unsatisfied with “off-the-shelf” DI transformer solutions, Millennia de-
signed a superior DI-dedicated transformer from the ground up. This
superior large geometry transformer (Millennia type DIT-01) exhibits
better than 3 Hz to 300 kHz frequency response (-3 dB), very low distor-
tion, and excellent phase uniformity.
Output employs conventional 3-pin male XLR connector providing the
transformer-coupled, fully “galvanically isolated” microphone level signal.
Pin 1 is ground. Pin 2 is positive polarity. Pin 3 is negative polarity. Out-
put impedance is approximately 150 ohms, which is nominally equivalent
to most professional recording microphone. Ground (pin 1) may be lifted
by engaging (up position) the toggle switch to the right of this XLR (see
rear panel drawing).