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15
XM910 Input and Output Connections
REAR PANEL
The XM910 contains two mono power amplifiers and depending on the operating mode, the two amplifiers can
be used independently (maximum output 300W + 300W) or in BRIDGE mode (maximum output 900W).
NOTE
: Use the MODE switch to select which signal is sent to the speaker output jacks, and to activate BRIDGE mode.
If the two power amplifiers are used for MAINS operation, two speakers can be connected to the AMP 1 A/B
jacks and two more to the AMP 2 A/B jacks, for a total of four speakers.
NOTE: When using the A and B jacks simultaneously, connect 8 through 16 Ohm speakers. In this case, be care-
ful not to connect a speaker to the BRIDGE jack.
The total impedance load for each amplifier must not exceed 4 Ohms, therefore in the example above, one
speaker with an impedance of 8 ohms is connected to each amp’s A and B jacks. (The A/B jacks are wired in
"Parallel", so the total impedance when two 8 Ohm speakers are connected is 4 Ohms.)
If you wish to use two amplifiers independently, let’s say for Main and Monitor operation, but only connect a sin-
gle speaker to the A or B jack, use a 4 through 8 Ohm speaker. Again, the total impedance load for each amplifi-
er must not exceed 4 Ohms, therefore one speaker with an impedance of 8 ohms can be connected to each
amp’s A and B jacks.
If the two amplifiers are used in a BRIDGE mode, only one speaker can be connected to the BRIDGE jack. The
total impedance load while operating in Bridge mode must not be less than 8 Ohms.
If you are connecting a speaker to the BRIDGE jack, use an 8 through 16 Ohm speaker.
CAUTION: When using a bridge connection, do not connect anything to the AMP 1 and AMP 2 jacks. Likewise,
when using the POWER AMP 1 and POWER AMP 2 jacks, do not connect anything to the BRIDGE jack.
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AMP 1 – Powered Speaker Outputs
The AMP 1 output has two 1/4-inch phone connectors, which are powered outputs used to connect your
left side main PA speaker when using the XM910 is stereo mode. When operating in MAIN / MONITOR
mode the AMP 1 powered output connectors are used to connect to floor or side fill monitors facing the per-
formers.
BRIDGE – Mono Output connector
The BRIDGE output has one 1/4-inch phone connector, which is a powered output used to connect one
main PA speaker when using the XM910 in mono BRIDGE mode.
AMP 2– Powered Speaker Outputs
The AMP 2 output has two 1/4-inch phone connectors, which are powered outputs used to connect your
right side main PA speaker when using the XM910 in stereo mode. When operating in MAIN / MONITOR
mode, the AMP 2 powered output connectors are used to connect left and right side MAIN PA speakers.
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