Rolls ABC904 产品宣传页

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.

For information on the Rolls One Year Limited Warranty, and to register this 

product, visit our website at www.rolls.com

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.

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.

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:

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.

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.