Toa MX-601 - Input Connections; Impedance and Level Matching; Input Specifications Table

Generally speaking, there are two rules to follow when connecting equipment outputs to the in-
puts of other equipment.
1. Properly match the impedances of the outputs and inputs.
2. Connect low impedance outputs to high impedance inputs.
It goes without saying that not only input and output impedance matching but also level match-
ing should be taken into consideration. Each input channel of the MX-601 is provided with an
input TRIM control, so the usable signal level range is very wide. Input impedances and levels
are shown in the following table.
INPUT SPECIFICATIONS
CONNECTION
INPUT
ACTUAL
LOAD
IMPEDANCE
FOR USE
WITH
NOMINAL
TRIM
POSI-
TION
SENSITIVITY
(PGM OUTPUT
LEVEL +4dB)
MAX BEFORE
CLIP INPUT
LEVEL
CONNECTOR
CH1
CH6
LOW Z
HIGH Z
OPEN
50k
50
to 250
MICRO-
PHONES
50k
OR
LOWER IMP
LINES
0
-30
0
-30
-55dBm (1.38mV)
-16dBm (123mV)
-35dBm (13.8mV)
+4dBm (1.23V)
-34dBm (15mV)
+ 1.7dB (0.94V)
-14dBm (150mV)
+20dB (7.75V)
XLR TYPE NC3F
PHONE JACK
AUX (1~2)
10k.
10k
OR
LOWER IMP,
LINES
-20dBm (77.5mV) -2dBm (0.61V) PHONE JACK
EFF/RET
50k
50k
OR
LOWER IMP,
LINES
-20dBm (77.5mV)
-2dBm (0.61V)
PHONE JACK
GEQ
50k
50k
OR
LOWER IMP,
LINES
+4dBm (1.23V) PHONE JACK
PWR/AMP
10k
10k
LOWER IMP
OR
+4dBm (1.23V)
PHONE JACK
TAPE
10k
10k
OR
LOWER IMP,
LINES
-20dBm (77.5mV)
-2dBm (0.61V) PCA PIN JACK
*Sensitivity is the level required to produce a program out level of +4dBm.
All XLR Type connectors are electronic balanced. Phone jack is unbalanced.
If the line going from one piece of equipment to another is long (more than 5m), we recommend
that balanced outputs be connected to balanced inputs.
As is described in the beginning of the Operating Instructions Manual, the connectors of the
MX-601 are wired as follows: Pin 1 is ground (shield). Pin 2 is cold (low, minus). Pin 3 is hot
(high, plus).
Input Connection
s
— 6 —
*0dBm is referenced to 0.775V RMS.
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