Rear Panel Controls - Inter-m OT-4240 Operating Manual

OT-4240/OT-4480/OT-4960

Rear Panel Controls

1. Amp Input Terminals
These terminals are connected to the output of a low-impedance amplifier like
the Inter-M QD-4240 (4Ω/60W), QD-4480 (4Ω/120W) or QD-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.
OT-4240 / 120VAC
OT-4240 / 230VAC
OT-4480 / 120VAC
OT-4480 / 230VAC
OT-4960 / 120VAC
OT-4960 / 230VAC
100V
166.7Ω
83.8Ω
41.6Ω
Output Transformer Unit
70V
81.7Ω 10.4Ω
81.7Ω
40.8Ω
40.8Ω
20.4Ω
20.4Ω
25V
5.2Ω
7