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ZXSUM8
CONFIGURATION
Internal Mode Switches: Change the mode of channels 2–4 between summing plus line-output conversion
(LOC) and line-output-conversion-only by fl ipping the internal switches, accessible by removing the cover of the
ZXSUM8.
Use LOC-ONLY mode to convert a channel’s input from high-level (speaker-level) to a low-level signal suitable for
connection to an amplifi er.
Use SUM+LOC mode to mix the channel in question with Channel 1. The mixed signal appears on the Channel
1 output at low-level suitable for connection to an amplifi er. The channel’s original signal is also converted to low-
level then passed through to its corresponding output.
CH4 CH3 CH2
mode
switches
inputs
RCA outputs
ground
isolation
jumper
isolated
ground
200 Ω
LOC-ONLY mode
SUM+LOC mode
If you experience noise after installing the ZXSUM8, try
adjusting the ground isolation jumper to the position that
provides the least amount of noise.
ZXSUM8
with cover removed
2010 ZXSUM8 RevC.indd 42010 ZXSUM8 RevC.indd 4 12/28/2009 11:19:01 AM12/28/2009 11:19:01 AM