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INTRODUCTION
Congratulations, and thank you for your purchase of the RFX ABC904 Route 3 switcher.
This unit was designed and manufactured to provide years of faithful service. Please
review this manual carefully - so you have a proper understanding of the operation of your
new ABC904.
The ABC904 is a versatile unit that works as a signal distribution device by taking a single
stereo or mono signal input, and switching it to up to three stereo outputs. The unit can
also take three separate stereo or mono signals in, and switch them to a single stereo or
mono output.
WARRANTY
For information on the Rolls One Year Limited Warranty, and to register this
product, visit our website at www.rolls.com
DESCRIPTION
Common Jacks: Two 1/4” Tip-Ring-Sleeve jacks for input/output and pass-through con-
nections.
A,B,C Jacks: Three 1/4” Tip-Ring-Sleev jacks for input/output connections.
A,B,C Switches: Mechanical latching switches - connect and disconnect the A,B,C jacks
to the Common jack(s).
BATTERY: Houses the 9V battery for powering the indicator LEDs.
CONNECTION
First, it must be stressed that the ABC904 should
either be operated in Stereo, or Mono mode
- NOT both. Using this device with mono cabling
and stereo equipment could damage your stereo
equipment.
Since the ABC904 is a passive device, connect-
ing a mono (Tip-Sleeve) plug to either the Com-
mon, or A,B,C jacks - that jack’s ring connection
will be grounded. This means the stereo signal will be lost.
Therefore, you must first determine whether you operating this unit in Stereo or Mono.
Refer to Figure 1 for the differences in Stereo and Mono 1/4” plugs.
Shown on the next page are two examples of connecting the ABC904. Example One
shows a single guitar being switched to three amplifiers. Example Two shows three gui-
tars being switched to a single amplifier.
IMPORTANT NOTICE: DO NOT USE THE ABC904 TO SELECT BETWEEN TUBE
AMPLIFIER OUTPUTS AND A SINGLE SPEAKER - DOING SO WILL DAMAGE THE
TUBE AMPLIFIERS.
Figure 1
Example 1
Example 2
STEREO CONNECTION
To connect the ABC904 for STEREO opera-
tion, use TRS stereo cabling and make sure
you are connecting to stereo jacks. If you are
connecting to individual Right and Left jacks of
other devices, use an “Insert” cable as shown
here:
OPERATION
After proper connections are made, the ABC904 will simply connect the indicated
channel (A, B, or C) to the Common jacks by pressing the corresponding switch.
Battery Replacement
The 9V battery powers the indicator LEDs. When these LEDs become dim - re-
place this battery with a fresh 9V alkaline battery.
SPECIFICATIONS
Connectors: 5 ea; 1/4” Tip-Ring-Sleeve jacks
Indicators: 3 ea; T1 LEDs (1 Green, 1 Blue, 1 Red)
Switches: 3 ea; Triple pull / double throw push switches
Power: 9 Volt (for the LEDs)
Size: 4” W x 1.9” H (at highest point) x 4.13” D
Weight: 3 lbs.