DESCRIPTION
FRONT PANEL
Note: Descriptions for Channel One through Channel Five are identical.
OUTPUT: 1/4” and 1/8” (3.5mm) Tip-Ring-Sleeve jacks for connection to a
standard pair of headphones or earphones. Output impedance is 10 Ohms.
LEVEL: Controls the amount of output signal from the indicated channel.
POWER LED: Indicates that the RA53b is connected to the power supply and is
on.
REAR PANEL
POWER: For connection to a Rolls 12 Volt (maximum) power supply.
RIGHT/MONO INPUT: 1/4” TS jack for connecting the “Right” side of a stereo
signal. If used alone (nothing connected to the LEFT/STEREO jack), a 1/4” TS
plug with a mono signal will feed both sides of the RA53b Outputs.
LEFT/STEREO INPUT: 1/4” TRS jack for connecting to the “Left” side of a stereo
signal. If used alone,(nothing connected to the RIGHT/MONO jack) a 1/4” TRS
plug with the “Right” side of the program material on the tip, and the “Left” side on
the ring may be connected for stereo operation. For example, a stereo headphone
output from a mixing console may be directly connected to the Left/Stereo jack via
a stereo TRS cable.
L /R INPUTS: RCA input jacks for connection to a signal source such as a CD or
cassette player.
BALANCED INPUTS: XLR input jacks for connection to a balanced line level
source such as the output of a mixer.
JOIN: 1/4” TRS jack for connection to another RA53b JOIN jack. Linking two units
together provides 10 channels of monitoring from a master stereo signal, with six
channels having an insert option.
CHANNEL INSERTs: 1/4” TRS jacks for receiving a stereo signal and directly
accessing the indicated channel’s circuitry.
SCHEMATIC
2
5