Inter-M OT-4960 - Manual (Page 6)

4 OT-4240/4480/4960
OUTPUT TRANSFORMER UNIT
Rear Panel Rear Panel
1. AMP INPUT TERMINALS
These terminals are connected to the output of a low-impedance amplifier like the Inter-M OT-4240
(4Ω/60W), OT-4480 (4Ω/120W) or OT-4960 (4Ω/240W).
2. SPEAKER OUTPUT TERMINALS
These output terminals may be connected with high-impedance distributed speaker systems.
For 120VAC operation, the 70V output terminal is recommended. For 230VAC operation, the 100V
or 70V terminals may be used.
The chart below shows recommended impedances.
100V 70V 25V
OT-4240 / 120VAC 81.7Ω 10.4Ω
OT-4240 / 230VAC 166.7Ω 81.7Ω
OT-4480 / 120VAC 40.8Ω 5.2Ω
OT-4480 / 230VAC 83.3Ω 40.8Ω
OT-4960 / 120VAC 20.4Ω
OT-4960 / 230VAC 41.6Ω 20.4Ω