Inter-M OPT-100D - Manual (Page 6)

OUTPUT TRANSFORMER UNIT
4 OPT-100D
Rear Panel Rear Panel
1. OPT INPUT FROM AMPLIFIER
Connect to 100W / 4Ω 20V amp output.
2. SPEAKER OUTPUT
If you want to use 100V output level, it connects 100V with COM. Speaker’s minimum impedance is 100Ω.
If you want to use 70V output level, it connects 70V with COM. Speaker’s minimum impedance is 49Ω.
※ NOTE : Before connecting speakers to the unit, be sure to disconnect the AC power cable. Make certain
that the total impedance is not less than the rated impedance indicated.
Do not put the speaker cable close to input signal cable.
1 2
OPT INPUT
CH 2 CH 1
SPEAKER OUTPUT
CLASS 2 WIRING
CH 2 CH 1
100V 70V COM 100V 70V COM
70V : 49Ω
100V : 100Ω