TOA Electronics A-9120DH - Manual (Page 22)

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7.3.2. ZM-9001 (Zone Manager)
The ZM-9001 adds 6 control inputs and can be mounted in a 1-gang electrical box.
[Front] [Rear] [Side]
[Bottom]
1
3
5
2
4
6
E OUT 2
3
2. Control buttons [1 – 6]
Activate the function assigned to them when pressed.
3. Control output terminal [E, OUT]
Connect this terminal to the 9000 Series amplifier's REMT VOL terminal.
Use a shielded cable with 50 Ω or less line resistance (per line) for this connection.
Avoid installation of this cable and power cables in the same conduit. Separate piping.