True to the Music
Radial Engineering Ltd.
LX8
™
User Guide
FEATURES
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1. XLR Inputs
- Front panel female XLR jacks allow easy
connection of individual signals. Rugged, glass-rein-
forced nylon construction for reliable connections.
2. Front Panel Lift Switch
- Disconnects the ground path
at the auxiliary and isolated outputs. Using the front pan-
el ground lift can eliminate ground loop noise between
equipment connected to the LX8 outputs.
3. Easy ID Label Zones
- For dry-erase markers or wax
pencil identification. Handy when using several LX8 at
a time.
4. Military Grade PCB
- The dual layer circuit board is
manufactured with plated through holes and secured
with 8 standoffs.
5. Transformers
- Each transformer is mounted directly on
the PCB in close proximity to the input for the shortest
possible signal path.
6. Heavy-duty Switches
- Front panel switches are metal
encased and rated at 20,000 operations.
7. Internal Chassis Ground Lift
- Input connectors are
100% isolated from the chassis, but an internal switch
is provided to connect signal ground (pin-1) to the chas-
sis without modifying the LX8. By default, this switch is
factory set to “lifted” allowing the chassis to “float” un-
grounded and should remain this way unless a specific
grounding scheme requires the signal ground to be tied
to the chassis.
8. 14-Gauge Chassis
- Made extra tough with heavy
gauge steel and welded corners to provide excellent
shielding and durability. Finished in baked enamel.
9. Isolated Output
- This output is transformer isolated
to block noise caused by ground loops and is wired in
parallel to DB-25 and Euroblocks terminals.
10. Auxiliary Output
- This is a direct output wired in par-
allel with the DIRECT output. The signal grounds may
be disconnected using the front panel LIFT switch. This
output is wired parallel to the DB-25 and Euroblocks ter-
minals.
11. DB-25 Pin-out Diagram
- The pin-out for the female DB-
25 connector is diagramed on the rear panel. All DB-25
connectors follow the Tascam standard for eight channel
analog signal interface.
12. Direct Output
- This output passes signal through the
LX8 and is wired parallel to the DB-25 and Euroblocks
terminals.
13. Euroblock Sockets
- These panel sockets receive 12-
pin Euroblock screw terminals. Each Euroblock con-
nects four channels with bare wire termination and fa-
cilitate custom options like interfacing a connector panel
or multi-pin disconnect. Euroblocks screw terminals are
optional and must be ordered separately. (Radial order
# R800 8050)
14. Rear Inputs
- The rear panel DB-25 and Euroblock in-
puts connect all eight channels and are wired parallel to
the front XLR connectors.
15. Chassis Ground -
Ground screw connection point used
in conjunction with the internal chassis lift switch to bond
the LX8 to earth.
Summary of Contents for LX8
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