Rolls RM67 User manual

RM67
Mic/Source Mixer
OWNERS MANUAL
LIMITED WARRANTY
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, TRANS-
PORTATION 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 WARRANTIES, OBLIGATIONS, OR LIABILI-
TIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
OF MERCHANTABILITYAND 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, INCI-
DENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR
ANY OTHER WARRANTY, 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 CORPORATION
SALT LAKE CITY, UTAH
11/03
FEATURES
•Three XLR balanced inputs with phantom power
• Four stereo Source inputs
•Tone controls for each Microphone input
• Clip indicators for each Microphone input
• Bass andTreble controls for the Source inputs
• 1/4” input for remote volume control
• RCA Record Out
• Master Output Level control
• 1/4”TRS balanced outputs
0 10
LEVEL
0 10
LEVEL
clip clip clip
TONE TONE TONE
0 10
LEVEL
0 10
LEVEL
0 10
LEVEL
0 10
LEVEL
0
LEV
E
MICROPHONE INPUTS SOURCE INPUTS
MIC ONE MICTWO MICTHREE 1 2 3 4
0
10
LEVEL
0 10
pwr
BASS TREBLE
- + - +
MASTER
LEVEL
4
MICROPHONE/SOURCE
MIXER
RM67

INTRODUCTION
Thank your for your purchase of the Rolls RM67 Microphone/Source Mixer.The
RM67 is a single rack space audio mixer with three XLR inputs and four stereo
RCA source inputs.Talkover features have been included on Mic 1 and Source 4
for paging and music priority functions.
NOTE:THIS MANUAL ASSUMESTHE USER HAS A WORKING KNOWLEDGE
OF AUDIO ELECTRONICS, BALANCED AND UNBALANCED CONNECTIONS,
AND PROPER SIGNAL LEVEL SETTING.
INSPECTION
1.Unpack and inspect the RM67 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 visit our website at www.rolls.com and click on the RegisterYour
Warranty Here button, or complete theWarranty Registration Card and return it to
the factory.
APPLICATIONS
Applications for the RM67 include aerobics studios, karoake lounges, clubs and
restaurants, or audio visual applications. Its versatile inputs and outputs make it
an important problem solver in many audio situations.
TABLE OF CONTENTS
Introduction 1
Inspection 1
Applications 1
Table of Contents 1
Description 2
Connection 3
Operation 4
Specifications 5
Schematic 6
Warranty Back Cover
SCHEMATIC
1 6

DESCRIPTION
FRONT PANEL
0 10
LEVEL
0 10
LEVEL
clip clip clip
TONE TONE TONE
0 10
LEVEL
0 10
LEVEL
0 10
LEVEL
0 10
LEVEL
0 10
LEVEL
0 10
pwr
BASS TREBLE
- + - +
MICROPHONE INPUTS SOURCE INPUTS
MASTER
LEVEL
MIC ONE MICTWO MICTHREE 1 2 3 4
MICROPHONE/SOURCE
MIXER
RM67
Mic 1 - 3:Adjust the level of signal from the corresponding Mic Input.
clip 1 - 3:LED indicating overload in the channel.The LED lights 3dB below
clipping.
TONE 1 - 3: Adjusts the frequency content of the signal in the channel.When the
control is turned counter-clockwise, the high frequencies are cut, when the control
is turned clockwise, the low frequencies are cut.
Source 1 - 4:Adjust the volume of input from the RCA Source Inputs.
Bass:Adjusts the low frequencies of the Source signals only.
Treble:Adjusts the high frequencies of the Source signals only.
Master Level:Adjusts the overall volume of the RM67 Main Outputs.
pwr:LED indicating power is applied to the RM67 and the unit is on.
REAR PANEL
MIC
3MIC 2MIC 1
mic/line mic/line mic/line
MIC
INSERT
SOURCE INPUTS
RECORD
OUT
MUTE
SPARE
PRIORITY
L
R
L
R
WARNING:
DO NOT EXPOSETHIS EQUIPMENT TO RAIN OR MOISTURE
NO USER SERVICABLE PARTS INSIDE.
RISQUE DE CHOC - NE PAS ENLEVER
Mic 1 - 3:XLR inputs for dynamic or condenser microphones, or balanced line-
level signals.
Mic/Line Switch:Pads the XLR Mic input by 30 dB when pressed in.
DIP SWITCH:Contains the small switches for engaging Mic 1 - 3 phantom power,
the priority (Talk Over) functions, and the Mono/Stereo select.
MIC INSERT: 1/4”TRS insert jack for adding external processing to the Mic
signals.Tip = send, ring = return.
SOURCE INPUTS:Stereo RCA jacks, Channels 1 - 4, for connection to stereo
sources such as AM/FM tuners, cassette players, cd players, or video players.
RECORD OUT:Stereo RCA jacks, contains all mixed signals before the Remote
Volume jack, and Master Level control.
SPARE:This RCA jack is not connected.
MUTE:RCA jack for connection to a tip-to-ground muting circuit.
REMOTE VOLUME:1/4”TS jack for connection to a remote potentiometer for
master volume control.20K Ohm audio taper potentiometer is recommended.
MAIN OUTPUTS:1/4”TRS balanced Right and Left Outputs.
SPECIFICATIONS
Input Impedance: Mic: 600 Ohms XLR balanced
Line: 22K Ohms
Source:
22K Ohms gold plated RCA
Mic Insert: 22K Ohms 1/4" TS unbal.
Max Input Level: Mic: -14 dBV Mic level
+20 dB Line levl
Source: 24 dBV
Connectors: 3: XLR, 6: Stereo RCA, 3: 1/4" TRS, 1: 1/4” TS
Phantom Power: +12 VDC
Output Level: +17 dBV max
Output Impedance: 51 Ohms
Max Gain: Mic: 60 dB
Source: 26 dB
Tone Controls: +/-12 dB 100 Hz Bass
+/-12 dB 11kHz Treble
Nose Floor: - 80 dB, THD: <.025%, S/N Ratio: 96 dB
Size: 19" x 1.75" x 6" (48.3 x 4.5 x 15 cm)
Weight: 5 lbs. (2.3 kg)
25

Fig. 1
OPERATION
DIP SWITCH SETTINGS
• If a microphone requires phantom power, move the Mic channel’s corresponding
PHAN DIP switch to the down position.This applies 12 volts dc phantom power to
the indicated microphone.
•Talkover switch 1 (T.O.1), when in the down position, all program material on all
inputs will be “ducked” or muted when a signal is present at Mic 1.
This function is used for paging.
•Talkover switch 2 (T.O. 2), when in the down position, Source 1,2, and 3 will be
“ducked” or muted by the signals at Source 4.
This function is for jukebox priority.With a jukebox connected to Source input 4,
and theTalkover switch 2 on (down), the other Source input signals such as
background music, will be muted and only the jukebox will be heard.
• The Mono/Stereo switch selects the output mode.When the switch is up, the unit
is in stereo mode.When the switch is down, the stereo signals are mixed to mono
and sent to both the Right and Left Main output jacks. Either jack can be used as
a mono output.
Adjust the Microphone levels for maximum input signal without clipping, and for a
comfortable listening level.Adjust each Source level for a desired listening level.
CONNECTION
Connect low impedance microphones to the Mic inputs. If a paging microphone is
being used, connect it to Mic Input 1 so it may be used with theTalk Over function.
Connect source signals such as CD players, cassette players or video players to
the RCA Source Inputs.If a jukebox is being connected, and you want its signal to
mute the other source signals, connect it to Source input 4.
RemoteVolume Control
To control the overall volume of the RM67 in a remote location, wire a 100K ohm
LinearTaper potentiometer to a 1/4”Tip-Ring-Sleeve plug as shown in Fig.1.
Mic Insert
To connect a signal processor to the RM67 microphone signal(s), use an insert
plug, or cable wired as shown in Fig.2.
Connect the Main Right and Left outputs to your power amplifiers.The RM67
output jacks will accommodate balanced or unbalanced connections. For unbal-
anced operation use 1/4”Tip Sleeve jacks, for balanced operation use 1/4”Tip
Ring Sleeve jacks.If a 1/4”TRS to XLR cable is needed, wire theTip of the 1/4”
jack to pin 2 of the XLR, the Ring to pin 3, and the Sleeve to pin 1 or the shield.
Mute
To mute all audio, connect an RCA plug to your muting circuitry.When the tip is
shorted to the ground - all audio is muted.
Connect the RM67 to a properly grounded AC outlet.
3 4
Sleeve Tip
Ring
100 K Ohm
Linear Taper
Potentiometer
To Mic Insert
Fig. 2