Rolls DJ Equipment RM82 User Manual

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of 4
 
DESCRIPTION
FRONT PANEL
RM82
pwr
MIC/LINE
MIXER
+20
LEVELTRIM TONE
LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL
0 10
LEVEL
1
TRIM TONE
2
TRIM TONE
3
TRIM TONE
4
TRIM TONE
5
TRIM TONE
6
TRIM TONE
7
TRIM TONE
LEVEL
8
MASTER
+20 +20 +20 +20 +20 +20 +20
NOTE: Descriptions for Channels 1 - 8 are identical.
TRIM: Adjusts the sensitivity of the XLR Microphone Inputs.
LEVEL: Adjusts the level of signal in the channel from off to +20 dB of gain.
TONE:Cuts the signal up to 12 dB, below 200 Hz when turned clockwise, or
above 6 kHz when turned counter-clockwise.
MASTER LEVEL: Adjusts the Main Output signal level.
pwr: LED indicating power is applied to the RM82.
Power Switch: Applies power to the unit. Please ensure the power cable is con-
nected to a properly grounded AC outlet.
REAR PANEL
CHANNEL 1
AUX
BUSS IN
PREFADE
OUT
MAIN
OUT
MODEL RM82
120 VAC
50/60 Hz 15 VA
MADE IN U.S.A.
SERIAL NUMBER
82-
PHANTOM POWER
8 7 6 5 4 3 2 1
WARNING:
DO NOT EXPOSE THIS EQUIPMENT TO RAIN
OR MOISTURE
CAUTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE BACK PANEL
NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
RISQUE DE CHOC - NE PAS ENLEVER
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
CHANNEL 6
CHANNEL 7
CHANNEL 8
on
MAIN OUTPUT: XLR balanced jack containing the RM82 main output signal.
PRE-FADE OUTPUT: RCA jack for connection to another RM81 Aux/Bus Input or
to another device such as a recorder.
AUX 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”.
PHANTOM POWER SWITCHES: 8 individual DIP switches for applying 48 Volts
of phantom power to the indicated channel’s XLR Input. The phantom power is for
powering condenser microphones. The Phantom Power switches are in the OFF
position when the RM82 is shipped from the factory.
CHANNEL INPUTS 1 - 8: 1/4” TS unbalanced, and XLR balanced input jacks.
The eight 1/4” jacks come from the factory configured as line inputs and are
electrically mixed with the XLR jacks. They may be used together if desired. These
inputs may be reconfigured as either Direct Outputs, or Inserts. See page 4 for
details.
5 2
SCHEMATIC
A NOTE ABOUT ROLLS MICROPHONE PREAMPLIFIER CIRCUITS
The Rolls servo-balanced Microphone Preamps feature many advantages over
other mic preamps. Among these are simplicity of design, 40db or higher CMRR
(common mode rejection ratio) than transistor input mic preamps. This means
much lower noise on long input lines, and very low distortion at high gain.
Discrete transistor preamps are non-linear at high gains, but not our design. We
feature a higher signal swing, which means our preamps have more headroom
before clipping.

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