Page 1
RM81
MIXMAX
Eight Channel Audio Mixer
OWNERS MANUAL
LIMITED W ARRANTY
This product is warranted to the original consumer purchaser to be free from defects in
materials and workmanship under normal installation, use and service for a period of one (1) year
from the date of purchase as shown on the purchaser’s receipt.
The obligation of Rolls Corporation under this warranty shall be limited to repair or
replacement (at our option), during the warranty period of any part which proves defective in
material or workmanship under normal installation, use and service, provided the product is
returned to Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products returned to
us or to an authorized Service Center must be accompanied by a copy of the purchase receipt. In
the absence of such purchase receipt, the warranty period shall be one (1) year from the date of
manufacture.
This warranty shall be invalid if the product is damaged as a result of defacement,
misuse, abuse, neglect, accident, destruction or alteration of the serial number, improper electrical
voltages or currents, repair, alteration or maintenance by any person or party other than our own
service facility or an authorized Service Center, or any use violative of instructions furnished by us.
This one-year warranty is in lieu of all expressed warranties, obligations or liabilities.
ANY IMPLIED W ARRANTIES, OBLIGATIONS, OR LIABILITIES, INCLUDING BUT NOT
LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, SHALL BE LIMITED IN DURATION TO THE ONE YEAR
DURATION OF THIS WRITTEN LIMITED WARRANTY. Some states do not allow limitations
on how long an implied warranty lasts, so the above limitation may not apply to you.
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY OTHER W ARRANTY,
EXPRESSED OR IMPLIED, WHATSOEVER. Some states do not allow the exclusion or
limitation of special, incidental or consequential damages so the above limitation or exclusion may
not apply to you. This warranty gives you specific legal rights, and you may also have other rights
which vary from state to state.
ROLLS CORPORA TION
SALT LAKE CITY, UT AH
5/02
SPECIFICATIONS
Input Impedance: Mic: XLR: 600 W balanced
1/4": 50K W unbalanced
Bus Input: 10K W unbalanced
Max Input Level: Mic: -15 dBV balanced
Line: +22 dBV
Input Connectors: 8: XLR, 8: 1/4" (Line), 1: RCA (Bus input)
Outputs: 1/4" bal. TRS Main, RCA unbalanced Prefade out
Max Gain: Mic: 55 dB
Line: 26 dB
Tone Control: 20 dB Treble/Bass cut
Phantom Power: +12 VDC
Output Level: +17 dBV max
Output Impedance: 51 W
Phase Shift: <10 degrees, 20Hz to 20 kHz
Max S/N ratio: 106 dB
THD: <.003%
CMRR: >52 dB (Mic)
Size: 19" x 1.75" x 6"
(48.3 x 4.5 x 15 cm)
Weight: 7 lbs. (3 kg)
LEVEL
TONE
bass
0 10 0 10 0 10 0 10 0 10
treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
1 2 3 4 5
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
LEVEL
bass treble
LEVEL
PWR
MIC/LIN
E
RM
81
6 7 8
0 10 0 10 0 10 0 10
Page 2
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 sev er al microphones or line sources need to be combined to a single output. Please revie w 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 bo x and pac kage .
If obvious physical damage is noticed, contact the carrier immediately to make a
damage claim. W e suggest sa ving 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
LEVEL
TONE
bass
0 10 0 10 0 10 0 10 0 10
treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
bass treble
LEVEL
TONE
LEVEL
bass treble
LEVEL
MIC/LIN
E
RM
81
1 2 3 4 5 6 7 8
0 10 0 10 0 10 0 10
Each channel has an input V OLUME control to adjust the input le v el to that
channel, a T ONE control which cuts the signal up to 15 dB , belo w 200 Hz or
above 6 kHz.
The MASTER V OLUME control adjusts the ov er all output le v el.
REAR P ANEL
CHANNEL 1
AUX
BUSS IN
PREFADE
OUT
MAIN
OUT
MODEL RM81
120 VAC
50/60 Hz 15 VA
SERIAL NUMBER
81-
MADE IN U.S.A.
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 NOT REMOVE BACK.
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
NRTL /C
Aux/Bus Input: RCA jac k 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 jac k f or connection to another RM81 A ux/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.
C H 6
C H 7
M A S T E R
+12V
-12V
-12V
-12V
-12V
-12V
+12V
+12V
-12V
-12V
-12V
-12V
-12V
-12V
-12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
+12V
-12V
-12V
C H 8
A U X /B U S IN
P R E F A D E O U T
R 1 0 7 1 0 0
R 1 1 2
1 0 K
R 2 1 2
1 0 K
R 3 1 2
1 0 K
R 4 1 2
1 0 K
R 5 0 7
1 0 0
R 5 1 2
1 0 K
R 6 1 2
R 7 1 2
R 8 1 2
J 9
P H O N E 1 / 4
J 1 1
P H O N E 1 / 4
J 1 2
P H O N E 1 / 4
J 1 3
P H O N E 1 / 4
J 1 4
P H O N E 1 / 4
J 1 5
P H O N E 1 / 4
J 1 6
P H O N E 1 / 4
J 1 8
P H O N E 1 / 4
J 1 7
P H O N E 1 / 4
R 1
1 0 K
R 2
1 0 0
R 3
1 0 K
R 4
1 0 0
R 6
C R 1
1 N 4 0 0 1
C R 2
1 N 4 0 0 1
C R 3
1 N 4 0 0 1
C R 4
1 N 4 0 0 1
C 5
1 U F
C 1 0 3
1 0 U
C 2 0 3
1 0 U
C 1 0 1
4 7 U
C 1 0 2
4 7 U
C 2 0 1
4 7 U
C 2 0 2
4 7 U
C 3 0 1
4 7 U
C 3 0 2
4 7 U
C 4 0 3
1 0 U
C 4 0 1
4 7 U
C 4 0 2
4 7 U
C 5 0 3
1 0 U
C 5 0 1
4 7 U
C 5 0 2
4 7 U
C 6 0 3
1 0 U
C 6 0 1
4 7 U
C 6 0 2
4 7 U
C 7 0 3
1 0 U
C 7 0 1
4 7 U
C 7 0 2
4 7 U
C 8 0 3
1 0 U
C 8 0 1
4 7 U
C 8 0 2
4 7 U
C 2
1 U
C 1
1 2 0 P F
1 16
S W 1 A D I P S W -8
C 5 0 5
1 2 0 P F
C 5 0 4
1 2 0 P F
C 4 0 4
1 2 0 P F
C 3 0 4
1 2 0 P F
C 2 0 4
1 2 0 P F
C 1 0 4
1 2 0 P F
C 6 0 4
1 2 0 P F
C 8 0 4
1 2 0 P F
C 7 0 4
1 2 0 P F
P 1
P 1 0 0 K
J 2 0
R C A P C
1 2
3
J 1
X L R F P C
1 2
3
J 2
X L R F P C
1 2
3
J 3
X L R F P C
1 2
3
J 4
X L R F P C
1 2
3
J 5
X L R F P C
1 2
3
J 6
X L R F P C
1 2
3
J 7
X L R F P C
1 2
3
J 8
X L R F P C
P 1 6
P 1 0 0 K
P 1 7
P 1 0 0 K
R 1 1 4
4 . 7 K
P 1 5
P 1 0 0 K
R 8 1 4
4 . 7 K
R 2 1 4
4 . 7 K
P 3
P 1 0 0 K
P 5
P 1 0 0 K
R 3 1 4
4 . 7 K
P 7
P 1 0 0 K
R 4 1 4
4 . 7 K
P 9
P 1 0 0 K
R 5 1 4
4 . 7 K
R 6 1 4
4 . 7 K
P 1 1
P 1 0 0 K
R 7 1 4
4 . 7 K
P 1 3
P 1 0 0 K
C 8 0 6
2 5 P F
C 7 0 7
2 5 P F
C 6 0 6
2 5 P F
C 3 0 5
1 2 0 P F
C 2 0 5
1 2 0 P F
C 1 0 6
2 5 P F
C 2 0 6
2 5 P F
C 3 0 6
2 5 P F
C 5 0 6
2 5 P F
C 4 0 6
2 5 P F
C 6 0 5
1 2 0 P F
C 7 0 5
1 2 0 P F
C 8 0 5
1 2 0 P F
3
C
2
B
1
A
3
C
2
B
1
A
3
C
2
B
1
A
3
C
2
B
1
A
3
C
2
B
1
A
3
C
2
B
1
A
3
C
2
B
1
A
3
C
2
B
1
A
R 5 0 6 4 7 K
C 4 0 5
1 2 0 P F
4 13
S W 1 D
D IP S W -8
R 4 0 7
1 0 0
5 12
S W 1 E
D IP S W -8
C 1 0 5
1 2 0 P F
2 15
S W 1 B
D IP S W -8
R 2 0 7 1 0 0
3 14
S W 1 C
D IP S W -8
R 3 0 7
1 0 0
C 3 0 3
1 0 U
R 6 0 7
1 0 0
7 10
S W 1 G
D IP S W -8
R 7 0 7
1 0 0
R 8 0 7
1 0 0
8 9
S W 1 H
D IP S W -8
J 1 9
R C A P C
R 5
1 0 0
I
1
G
2
O
3
U 1 4
7 8 1 2
I
2
G
1
O
3
U 1 5
7 9 1 2
S W 2
S W S P S T
P L 1
P L U G A C M A L E
R 1 0 3
3 3 2
R 1 0 4
3 3 2
R 1 0 5
4 9 . 9 K
R 1 0 8
4 9 . 9 K
C 1 0 7
.1 U F
R 1 1 0
4 . 7 K
P 2
P 1 0 0 K
C 1 0 8
.0 1
R 1 0 9
4 . 7 K
P 4
P 1 0 0 K
C 2 0 8
.0 1
R 2 1 0
4 . 7 K
R 2 0 9
4 . 7 K
C 2 0 7
.1 U F
2
3
1
4
U 1 3 A
4 5 6 0
T 1
M C I 4 0 7 4 0 2 4
6
5
7
8
U 2 B
4 5 6 0
2
3
1
4
U 2 A
4 5 6 0
6
5
7
8
U 5 B
4 5 6 0
6
5
7
8
U 3 B
4 5 6 0
2
3
1
4
U 3 A
4 5 6 0
6
5
7
8
U 6 B
4 5 6 0
6
5
7
8
U 9 B
4 5 6 0
6
5
7
8
U 8 B
4 5 6 0
5
6
7
8
U 7 B
4 5 6 0
3
2
1
4
U 4 A
4 5 6 0
2
3
1
4
U 5 A
4 5 6 0
2
3
1
4
U 6 A
4 5 6 0
5
6
7
8
U 4 B
4 5 6 0
3
2
1
4
U 1 A
4 5 6 0
5
6
7
8
U 1 0 B
4 5 6 0
6
5
7
8
U 1 1 B
4 5 6 0
6
5
7
8
U 1 2 B
4 5 6 0
2
3
1
4
U 1 2 A
4 5 6 0
2
3
1
4
U 1 1 A
4 5 6 0
3
2
1
4
U 1 0 A
4 5 6 0
3
2
1
4
U 7 A
4 5 6 0
2
3
1
4
U 8 A
4 5 6 0
2
3
1
4
U 9 A
4 5 6 0
C 6
1 0 U F
5
6
7
8
U 1 B
4 5 6 0
6
5
7
8
U 1 3 B
4 5 6 0
C R 5
L D S R
C 7
5 0 3
R 1 0 1
4 . 9 9 K
R 1 0 2
4 . 9 9 K
R 2 0 1
4 . 9 9 K
R 2 0 2
4 . 9 9 K
R 3 0 1
4 . 9 9 K
R 3 0 2
4 . 9 9 K
R 4 0 1
4 . 9 9 K
R 4 0 2
4 . 9 9 K
R 5 0 1
4 . 9 9 K
R 5 0 2
4 . 9 9 K
R 8 0 1
4 . 9 9 K
R 8 0 2
4 . 9 9 K
R 6 0 1
4 . 9 9 K
R 6 0 2
4 . 9 9 K
R 2 0 3
3 3 2
R 2 0 4
3 3 2
R 3 0 3
3 3 2
R 3 0 4
3 3 2
R 4 0 3
3 3 2
R 4 0 4
3 3 2
R 5 0 3
3 3 2
R 5 0 4
3 3 2
R 6 0 3
3 3 2
R 6 0 4
3 3 2
R 7 0 3
3 3 2
R 7 0 4
3 3 2
R 8 0 3
3 3 2
R 8 0 4
3 3 2
R 2 0 5
4 9 . 9 K
R 2 0 8
4 9 . 9 K
R 3 0 5
4 9 . 9 K
R 3 0 8
4 9 . 9 K
R 4 0 5
4 9 . 9 K
R 4 0 8
4 9 . 9 K
R 5 0 5
4 9 . 9 K
R 5 0 8
4 9 . 9 K
R 8 0 5
4 9 . 9 K
R 8 0 8
4 9 . 9 K
R 7 0 8
4 9 . 9 K
R 6 0 5
4 9 . 9 K
R 6 0 8
4 9 . 9 K
R 1 0 6 1 8 K
R 2 0 6
1 8 K
R 4 0 6 1 8 K
R 3 0 6 1 8 K
R 6 0 6 1 8 K
R 7 0 6 1 8 K
R 8 0 6 1 8 K
R 6 1 3 1 0 0
R 7 1 3 1 0 0
R 8 1 3
1 0 0
R 5 1 3 1 0 0
R 4 1 3 1 0 0
R 3 1 3 1 0 0
R 2 1 3 1 0 0
R 1 1 3 1 0 0
R 7 0 1
4 . 9 9 K
R 7 0 2
4 . 9 9 K
R 7 0 5
4 9 . 9 K
C 1 3
1 0 0 0 U F 1 6 V
C 1 4
1 0 0 0 U F 1 6 V
1
ROLLS CORPORATION
5968 South 350 West
Salt Lake City, Utah
84107
118-Jun-1999
Title
Size:
Date:
Rev:
of
Rc
R O L L S M I X M A X 8 R M 8 1
D
+12V
1 16
S W 1 A D I P S W -8
C 3 0 7
.1 U F
R 3 1 0
4 . 7 K
P 6
P 1 0 0 K
C 3 0 8
.0 1
R 3 0 9
4 . 7 K
C 4 0 7
.1 U F
R 4 1 0
4 . 7 K
P 8
P 1 0 0 K
C 4 0 8
.0 1
R 4 0 9
4 . 7 K
C 5 0 7
.1 U F
R 5 1 0
4 . 7 K
P 1 0
P 1 0 0 K
C 5 0 8
.0 1
R 5 0 9
4 . 7 K
C 6 0 7
.1 U F
R 6 1 0
4 . 7 K
P 1 2
P 1 0 0 K
C 6 0 8
.0 1
R 6 0 9
4 . 7 K
C 7 0 7
.1 U F
R 7 1 0
4 . 7 K
P 1 4
P 1 0 0 K
C 7 0 8
.0 1
R 7 0 9
4 . 7 K
C 8 0 7
.1 U F
R 8 1 0
4 . 7 K
C 8 0 8
.0 1
R 8 0 9
4 . 7 K
1 0 K
1 0 K
1 0 K
Document Number: RM81.SCH
Sheet:
4 . 7 K
P O W E R
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
Loading...