Thank your for your purchase of the Rolls RM74 MixMate 2 Mic / Source Mixer. The RM74
mixes two microphones with up to four stereo source signals such as CD players, karaoke
machines, MP3 Players, etc.. The unit is housed in a compact yet sturdy steel 1U rack
1. Unpack and inspect the RM74 box and package.
Your RM74 was carefully packed at the factory in a protective carton. Nonetheless, be
sure to examine the unit and the carton for any signs of damage that may have occurred
during shipping. If obvious physical damage is noticed, contact the carrier immediately to
make a damage claim. We suggest saving the shipping carton and packing materials for
safely transporting the unit in the future.
2. For warranty information, visit our website; www.rolls.com Please register your new
RM74 there, or complete the Warranty Registration Card and return it to the factory.
INPUT: Balanced XLR jack for connection to a dynamic or condenser microphone. This
jack parallels the Channel 1 Microphone Input on the rear panel.
NOTE: The following two descriptions are for Mic 1 and Mic 2.
LEVEL: Adjusts the amount of signal from the Microphone Input channel to the Main
TONE: Adjusts the relative frequency components of the Mic signal. Turning this control
clockwise from the center (detented) position decreases the low frequencies. Turning the
control counter-clockwise from center decreases the high frequencies.
SOURCE LEVEL CONTROLS 1 - 4: Adjust the amount of signal from the indicated
Source channel to the Main Outputs.
IN 4: 1/8” (3.5 mm) Source Input jack. This jack parallels the Source 4 Input on the rear
BASS: Varies the amount of the low frequency portion (150 Hz) of the Source signals.
TREBLE: Varies the amount of the high frequency portion (10 kHz) of the Source signals.
CUE SELECT: Selects a Source signal, or the Main Output signal to be sent to the Head-
HEADPHONE LEVEL: Adjusts the amount of signal to the Headphone Output.
HEADPHONE OUTPUT: 1/4” Tip-Ring-Sleeve jack for connection to any standard pair of
pwr LED:Indicates that the RM74 is powered on.
INPUT: Connects to the included Rolls PS27 power adapter.
LINE OUTPUTS RCA: Unbalanced output jacks
1/4”: Tip-Ring-Sleeve balanced ouput jacks
SOURCE INPUTS: Unbalanced RCA input jacks.
FX INSERT: 1/4” Tip-Ring-Sleeve jack for connection to an insert plug (see diagram) and
to an effects processor. Allows for effects to be added to the microphone signals.
PHANTOM POWER: Header pins for applying 12VDC phantom power to the indicated
MICROPHONE INPUTS 1 and 2: Balanced XLR jacks for connecting to dynamic or con-
Ensure the RM74 is securely mounted in a 19” rack. Connect the power supply to an AC
outlet (preferrably a power strip with master switch). If the unit is to be used in a perma-
nent install, connect all sources and microphones to the desired channels on the rear
panel. Remember which signal sources are connected to which Source Inputs.
For use in mobile DJ/Karaoke rigs, the microphone should be connected to the front panel
Microphone Input so it may be easily removed when the mobile rig is packed.
Shown below is a possible connection example for the RM74.
Make sure all audio connections are in place, and power is applied to all pieces of equip-
ment necessary for operation, ie; speakers, power amplifiers, microphones etc.
Normally, only one source signal is heard at a time along with a microphone signal. There-
fore, begin with all Levels completely counter-clockwise (off). Keep the Headphone Level
control low and, using the Cue Select switch, select which Source signal you wish to hear.
There will be nothing heard from the Main Outputs until you increase the level of a Source
or Mic channel. You may now “cue” or prepare the Source selection for playing. Set the
Headphone Level for a comfortable amount. Increase the Source Level of the “cued” chan-
nel, and begin playing the selection.
You may now select a different channel by moving the Cue Select switch to another
Source Channel, and “cue” another song.
PS27
