5
■Rear Panel
1HPF switches
These switches are used to turn on and off the HPF
(High Pass Filter) for each channel. When set to ON,
frequencies below 80 Hz are filtered using a 12 dB/
octave high pass filter.
Turn this switch ON if 70V-line, high-impedance
speakers are connected.
In Bridge mode, only the HPF switch of the first
channel in the pair is active, i.e., channel A of pair A–
B, channel C of pair C–D, and channel E of pair E–F
(XM6150 only).
2Attenuators
These detented controls are used to attenuate the input
signal from –∞ dB to 0 dB for each channel.
In Bridge mode, only the attenuator of the first channel
in the pair is active, i.e., channel A of pair A–B,
channel C of pair C–D, and channel E of pair E–F
(XM6150 only).
3XLR inputs
These balanced XLR-3-31 type connectors are used to
connect input signals. They are wired pin 1–ground,
pin 2–hot (+), and pin 3–cold (–).
1
23
Cold
GroundHot
In Bridge mode, only the XLR input of the first channel
in the pair is active, i.e., channel A of pair A–B,
channel C of pair C–D, and channel E of pair E–F
(XM6150 only).
80

13

4

8

7

52 6

4Euroblock connectors
These balanced Euroblock connectors are used to
connect input signals.
In Bridge mode, only the Euroblock connector of the
first channel in the pair is active, i.e., channel A of pair
A–B, channel C of pair C–D, and channel E of pair E–
F (XM6150 only).
5CH A TO ALL CH switch
This switch is used to feed the input signal connected
to channel A to all channels.
When set to EACH CH, the input signal connected to
each channel is amplified and output by each channel
respectively. When set to CH A TO ALL CH,
however, the input signal connected to channel A is
fed to all channels.
6BRIDGE switches
These switches are used to bridge the following
channel pairs: A–B, C–D, and E–F (XM6150 only).
When set to OFF, the two channels operate indepen-
dently. For example, the signal connected to input
channel A is amplified and output by the channel A
outputs, while the signal connected to input channel B
is amplified and output by the channel B outputs.
When set to BRIDGE, the signal connected to input
channel A is amplified and output by the bridged
outputs A–B, and channel B’s inputs are not used.
* The illustration shows model XM6150.