Radial Engineering 8cx, Manual

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True to the Music
Radial Engineering Ltd.
8ox & 8cx Owner’s Manual
8OX FEATURE SET
1. XLR Inputs - Front panel female XLR jacks allow easy
connection of individual signals. Rugged, glass-reinforced
nylon construction for reliable connections.
2. PAD -20dB - Prevents transformer overload when con-
necting high output devices. Only the ISOLATED output is
affected by the PAD.
3. Front panel Lift switch - Disconnects the ground path at
the DIRECT WITH GROUND LIFT auxiliary output. Using
the front panel ground lift can eliminate ground loop noise
between equipment connected to the 8ox direct outputs.
4. Easy ID label zones - For dry-erase markers or wax pencil
identifi cation. Handy when using several 8ox at a time.
5. Military Grade PCB - The dual layer circuit board is
manufactured with plated through holes and secured with
8 standoffs.
6. Transformers - Each transformer is mounted directly on
the PCB in close proximity to the input for the shortest
possible signal path. Choice of standard Radial or optional
Jensen transformers.
7. Heavy-duty Switches - Front panel switches are metal
encased and rated at 20,000 operations.
8. Internal Ground Lift - Each channel features an internal
switch that, by default, is set to “lifted” so the transformer
can isolate ground potential voltages. It may be used by
system designers to accommodate specifi c grounding
schemes when desired.
9. 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 chassis
without modifying the 8ox. By default, this switch is factory
set to “lifted” allowing the chassis to “fl oat” ungrounded and
should remain this way unless a specifi c grounding scheme
requires the signal ground to be tied to the chassis.
10. 14-Gauge Chassis - Made extra tough with heavy gauge
steel and welded corners to provide excellent shielding
and durability. Finished in baked enamel.
11. 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.
12. Direct With Ground Lift - This is an auxiliary output
wired in parallel 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 Eu-
roblocks terminals.
13. 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.
14. Euroblock Sockets - These panel sockets receive 12-pin
Euroblock screw terminals. Each Euroblock connects four
channels with bare wire termination and facilitate 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)
15. Direct Output - This output passes signal through the
8ox and provides the return path for phantom power.
This output is wired parallel to the DB-25 and Euroblocks
terminals.
16. Rear Inputs - The rear panel DB-25 and Euroblock inputs
connect all eight channels and are wired parallel to the
front XLR connectors.
17. Chassis Ground - Ground screw connection point used
in conjunction with the internal chassis lift switch to bond
the 8ox to earth.
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