Rolls RM74 specifications Description, Connection, Operation, Inspection

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 chassis.

INSPECTION

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.

DESCRIPTION

FRONT PANEL

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 Outputs.

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 panel.

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- phone Output.

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 audio headphones.

pwr LED:Indicates that the RM74 is powered on.

REAR PANEL

DC 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.

MICROPHONE INPUTS 1 and 2: Balanced XLR jacks for connecting to dynamic or con- denser microphones.

CONNECTION

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.

PS27

OPERATION

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.