CONTRACTOR PRECISION SERIES
10 Owner‘s Manual
2.7 Selecting the Mode of Output (OUTPUT)
Different output modes are available for the amplifier‘s output channels. In low impedance mode (LZ) each output channel can
drive up to 4 loudspeakers. Each channel can be switched to high impedance mode (HZ) for driving 70 V or 100 V
loudspeakers without output transformers (Direct Drive).
In DUAL or PARALLEL mode each output channel‘s OUTPUT setting can be independently set. In BRIDGED mode for each
pair of outputs only the setting of the channel with odd number (1, 3, 5 or 7) matters, the setting of the channel with even
number (2, 4, 6 or 8) is ignored.
Following section describes the four different OUTPUT settings of CPS amplifiers.
2 Ohm Mode
In 2 Ohm mode the power amplifier reaches maximum output power having a load of 2
Ω
connected. Up to 4 cabinetts having
a impedance of 8
Ω
each can be driven by each amplifier channel. This mode should be used if a high number of speaker with
medium or low power rating should be driven in low impedance mode (LZ).
4 Ohm Mode
In 4 Ohm mode the power amplifier reaches maximum output power having a load of 4
Ω
connected. Up to 2 cabinetts having
a impedance of 8
Ω
each can be driven by each amplifier channel.
This mode should be used if speakers with high power rating (e.g. Subwoofers) should be driven in low impedance mode
(LZ).
Illustration 2.4: DUAL mode of CH 1 and CH 2 in 2 Ohm Mode
Illustration 2.5: DUAL mode of CH 1 and CH 2 in 4 Ohm Mode
preliminary
