Rolls RM81 owner manual Introduction, Features, Inspection, Description, Schematic

INTRODUCTION

Thank your for your purchase of the Rolls RM81 MIXMAX eight channel audio mixer. The RM81 is a microphone and line mixer in a single 19” rack space. It is intended for sound reinforcement or studio applications where several micro- phones or line sources need to be combined to a single output. Please review this manual for proper operation.

FEATURES:

•8 XLR Mic inputs

•Individual phantom power switches for each channel

•8 1/4” unbalanced line inputs which may be internally jumpered to be line outputs.

•Wide-range tone controls for each channel

•RCA Aux/Bus input and pre-master output for cascading units or recording

INSPECTION

1. Unpack and inspect the RM81 box and package.

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. Please complete the Warranty Registration Card and return it to the factory.

DESCRIPTION

FRONT PANEL

1	2	3	4	5	6	7	8
TONE	TONE	TONE	TONE	TONE	TONE	TONE	TONE		MIC/LINE
									MIXER
0 10 bass treble 0	10 bass treble	0 10 bass treble	0 10 bass treble 0	10 bass treble	0 10 bass treble 0	10 bass treble	0 10 bass treble	0 10	PWR
LEVEL	LEVEL	LEVEL	LEVEL	LEVEL	LEVEL	LEVEL	LEVEL	LEVEL

RM81

Each channel has an input VOLUME control to adjust the input level to that channel, a TONE control which cuts the signal up to 15 dB, below 200 Hz or above 6 kHz.

The MASTER VOLUME control adjusts the overall output level.

REAR PANEL

SERIAL NUMBER

MODEL RM81

CHANNEL 8

CHANNEL 7

CHANNEL 6

CHANNEL 5

CHANNEL 4

CHANNEL 3

CHANNEL 2

CHANNEL 1

81-

PHANTOM POWER

8 7 6 5 4 3 2 1

AUX

PREFADE

MAIN

BUSS IN

OUT

OUT

120 VAC

MADE IN U.S.A.

WARNING: DO NOT EXPOSE THIS EQUIPMENT TO RAIN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT NOT REMOVE BACK.

50/60 Hz 15 VA

NRTL /C

RISQUE DE CHOC - NE PAS ENLEVER

OR MOISTURE.

NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

Aux/Bus Input: RCA jack which connects directly to the RM81 mix bus. The jack may be connected to another RM81 Pre-Fade Output - making this unit the “Master”.

Pre-Fade Output: RCA jack for connection to another RM81 Aux/Bus Input, making this unit the “Slave”.

Main Output: 1/4” TRS balanced jack containing the RM81 overall output signal.

Phantom Power Switches: 8 individual DIP switches for applying 12 Volts of phantom power to the indicated channel. The phantom power is for powering condenser microphones.

Channel Inputs 1 - 8: 1/4” TS unbalanced, or XLR balanced input jacks.

CONFIGURING THE 1/4” INPUT JACKS AS DIRECT OUTS

The eight 1/4” jacks come from the factory as line inputs and are electrically mixed with the XLR jacks. They may be used together if desired. To configure a channel’s 1/4” jack as a Direct Out, first remove the RM81 lid. For each channel there is a three-pin header with a shorting jumper on two pins. The setting is on “IN”. By moving the shorting jumper to the other side labeled “OUT”, the jack then becomes a Direct Output.

SCHEMATIC

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ROLLS CORPORATION

5968 South 350 West

84107

Document Number: RM81.SCH

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