Henry Engineering SIXMIX - Manual (Page 2)

PAGE 2
2.2 CONNECTIONS
AND WIRING
All connections are on the back panel. XLR connectors are used for mics; ¼” TRS (Tip-Ring-Sleeve) jacks are used
for most other I/O. ALWAYS use TRS (“stereo”) plugs for ALL ¼” jacks. Unbalanced inputs are via standard RCA
jacks. Note that the upper jacks are RIGHT channels; the lower jacks are LEFT channels.
2.2.1 MIC
INPUTS
The SIXMIX has inputs for 2 microphones. Microphones should be low-impedance professional units with
balanced outputs. Dynamic or ribbon mics are suggested. Powered condenser mics can be used, although the
console does not provide phantom power. Connect microphones to the female XLR connectors on the rear of the
console. The mic plug should be wired as follows:
PIN 1: Ground
PIN 2: High
PIN 3: Low
2.2.2 MIC PROCESS INSERT
The SIXMIX provides for the insertion of external microphone processing equipment, e.g., a mic limiter or equalizer.
External mic processing equipment should be interfaced via the TRS Mic Process Insert jacks. These jacks insert
the processing gear just after the console’s mic preamps, but before the mic channel faders. The mic preamp
output and return circuits are unbalanced, at a nominal level of –10 dbu.
Wire the mating TRS plug as follows:
TIP:
To processor input (from mic preamp output)
RING: From processor output (to console fader input)
SLEEVE: Ground.
2.2.3 LINE
INPUTS
Line level inputs are used for CD players, tape decks, and other analog sources that operate at line level.
SIXMIX has 4 stereo Line mixing channels, each of which has two inputs: “A” and “B”. The A inputs are for
professional balanced source equipment; the B inputs are for “consumer” unbalanced source equipment. Input 6A
is dedicated to the internal USB codec for use with a computer, hence there is no 6A input jack.
Connect balanced source equipment via the TRS input jacks labeled 3A, 4A, and 5A. The upper jack is for the
RIGHT channel; the lower jack is for the LEFT channel. Wire the TRS plug as follows:
TIP: High
RING: Low
SLEEVE: Ground (For most installations, connect the ground wire at both ends.)
Connect unbalanced (consumer) source equipment to the RCA jacks labeled 3B, 4B, 5B, and 6B. The upper (red)
jack is the RIGHT channel; the lower (white) jack is the LEFT channel.
2.2.4 USING A TELEPHONE HYBRID
If the console will be interfaced to a telephone hybrid (for broadcasting telephone calls), the Receive (Caller) output
of the hybrid should be fed into Channel 3A or 3B. This is because the Mix Minus output of the console contains
ALL line sources mixed to the Program bus, except for Channel 3. This “Program-minus-caller” Mix Minus output is
fed back to the hybrid’s Send input. The caller will therefore be able to hear all sources mixed on the Program bus,
minus himself. Note: The hybrid can also be used on Channel 2, if that channel is not being used for a
microphone. See Section 2.1.2 of this manual.
2.2.5 AIR MONITOR INPUT
The SIXMIX console provides an Air Monitor input that can be used to feed an off-air monitor into the console’s
Monitor system. This input is electrically identical to the other balanced Line channel inputs, and should be
connected the same way. Any professional demodulator or tuner can be used.