5
Operating Manual - MX-206 Stereo Microphone Mixer
noise ratio and should only be used when the input is be-
ing overdriven with the Input dB (gain) switch at its mini-
mum setting.
5.7 Tape/CD Input - Tape Output
The stereo inputs on RCA connectors have a
nominal operating level of -10dBu to match most tape
decks and CD players. The tape outputs are -10dBu "pre-
master", so they are not affected by the settings of the
output controls.
5.8 Mono Transformer Balanced Output
The mono transformer output uses a male XLR
type connector and provides total isolation for 600 ohm
lines. Pin 1 is ground, pin 2 is (+), and pin 3 is (-). This
output is controlled by the Mono level, with a nominal
operating level of +4dBu.
Note: The transformer-balanced output is de-
signed to drive up to +24dBu into a 600 ohm load. Be-
cause of the nature of an output transformer, the output
level increases as the impedance of the terminating load
becomes higher than 600 ohms. Whereas a "direct-
coupled" output stage like that of the stereo outputs will
not change as the load changes, any transformer used in
an audio path is affected by its termination impedance.
Since line level inputs on audio devices are typically 10K
Ω
or higher, expect a slight increase (2.5dB) in output level
when driving high impedance inputs with the mono trans-
former output. The output meters will reflect the levels
present on the stereo outputs, regardless of the load on
the transformer output.
5.9 Stereo Outputs
The Stereo Outputs are controlled by the left and
right master. They are 1/4" pseudo-balanced TRS jacks
with a nominal operating level of +4dBu into any load.
Ch.6
(-20dB)
Pad
Ch.1
(-20dB)
Pad
Ch.2
(-20dB)
Pad
Ch.3
(-20dB)
Pad
Ch.4
(-20dB)
Pad
Ch.5
-20dB
Pad
PUSH
PUSH
PUSH
PUSH
PUSH
PUSH
MX-206
Stereo
Six Channel
Microphone Mixer
On
Power
Mono
Phones
Clip
+6
0
-6
-12
-20
Output
VU
10
9
7
6
5
1
4
Mono/Phones
Output
-L-
-R-
0
Stereo
Outputs
Stereo
Aux Input
R
L
8
7
6
5
4
Ch.6
0
10
-40
-20
-60
Stereo
Headphones
9
7
6
5
1
2
3
4
0
10
9
7
6
5
1
3
4
0
10
9
7
6
5
1
3
4
0
10
Right
Left
evel
Pan
Level
Input
(dB)
Phantom
Two-conductor (twisted pair) shielded cable is
best for all XLR type connections. Belden No. 8412, or
its equivalent, is an excellent cable due to its heavy con-
struction. This type of cable should be used for all por-
table applications. Snake cables containing multiple
shielded pairs must be handled very carefully because the
leads tend to be fragile, and a broken conductor is diffi-
cult to repair.
If low level and high level lines (e.g., micro-
phones and mixer line outputs), or if either of these lines
and speaker cables are run parallel for long distances,
crosstalk may be significant. In fact, the crosstalk (sig-
nal leakage between cables) can cause an electronic feed-
back loop, oscillation, and possibly damage to the
equipment. To minimize crosstalk, physically separate
low level (microphone) cables from speaker cables by the
greatest feasible distance. At any point where cables meet,
run low level cables perpendicular to high level or speaker
cables. If low and high level or speaker cables must be
run parallel and in close proximity to one another, they
should be bundled separately.
5.1 Microphone Input
The microphone input is an active balanced type
with a nominal impedance of 1200 ohms. Its noise per-
formance is best with a 200 ohm microphone. The Mic
input connector is a standard 3-pin XLR female with the
shield on pin 1, the (+) in-phase connection on pin 2, and
the (-) out-of-phase connection on pin 3.
5.2 Input Pad
The Pad is a 20dB attenuation switch on the rear
panel for use with each XLR microphone input. It should
normally be left in the "out" position for best signal to