True to the Music
Radial Engineering Ltd.
LX8
™
User Guide
SIGNAL FLOW
Take a moment to follow the signal path through the block diagram below.
Inputs 1-8
DB-25
Front Panel
XLR x 8
Inputs 1-8
Euroblock
Direct Output and
Return Path for 48V
Auxiliary Output with
Ground Lift
Transformer
Isolated Output
Front Panel
Ground Lift
DB-25
Euro
Block
Front Panel
Ground Lift
DB-25
DB-25
Euro
Block
Euro
Block
Isolation
Transformer
1
2
3
4
2
Parallel Inputs
For flexibility, the LX8 has three paralleled inputs.
• Female XLR connectors on the front panel
• 25 pin D-SUB (DB-25) on the rear panel
• Euroblocks screw terminals on the rear panel (Set of eight
Euroblocks terminals sold separately, Order # R800 8050).
Direct Output
The DIRECT output is the primary “straight through” output. It
is paralleled to DB-25 and Euroblocks terminals for flexibility.
Auxiliary Direct Output with Ground Lift
The AUXILLARy outputs uses eight front panel switches to
lift the ground. This output may be patched to another audio
system that may or may not be transformer isolated itself. The
DIRECT WITH GROUND LIFT output is paralleled to DB-25
and Euroblocks terminals.
Isolated Output
The ISOLATED outputs uses eight precision Jensen audio
isolation transformers to decouple the signals from the DI-
RECT outputs. This output may be patched to a separate
audio system without creating ground loops. The ISOLATED
output is paralleled to DB-25 and Euroblocks terminals.
Transformer
After the PAD the signal is fed to the isolation transformer
where the mic signal is decoupled to eliminate noise from
ground loops. For the most flexibility when designing technical
ground systems, each transformer features an internal switch
allowing the signal ground to connect around the transformer.
RF Filter
(not shown in the diagram)
The three paralleled inputs employ a RF network filter on their
ground paths to prevent unused inputs from acting like anten-
nas when the ground is lifted. Any radio frequencies picked up
by an open pin will be shunted to ground.
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2
3
4
Summary of Contents for LX8
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