Rolls MA1705 User manual

MA1705
Mixer / 70 Volt Amplifier
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 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, 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
2/04
MIC ONE MIC TWO
tone tone
SOURCE
ONE SOURCE TWO SOURCE THREE
TREBLE BASS
0 10
OUTPUT
LEVEL
pwr
- + - + 0 10 0 10 0 10 0 10 0 10
clip MA1705
Mixer /
70 Volt Amplifier

INTRODUCTION
Thank your for your purchase of the Rolls MA1705 Mixer / Amplifier. The MA1705
is a two rack space mixer amplifier designed for restaurants, schools, churches,
clubs etc. The unit provides a compact and efficient way to mix up to three
sources such as AM/FM tuners, CD players, and video players with up to two
microphones. Priority talkover is provided on Microphone Two for paging, and on
Source One for a jukebox, telephone, etc. The power output section is to be
connected to a 70 Volt system.
NOTE: THIS MANUAL ASSUMES THE USER HAS A WORKING KNOWLEDGE
OF AUDIO ELECTRONICS, BALANCED AND UNBALANCED CONNECTIONS,
AND PROPER SIGNAL LEVEL SETTING.
INSPECTION
1. Unpack and inspect the MA1705 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 Register Your
Warranty Here button, or complete the Warranty Registration Card and return it to
the factory.
TABLE OF CONTENTS
Introduction 1
Inspection 1
Table of Contents 1
Description 2
Connection 3
Operation 4
Specifications 5
Schematic 6
Warranty Back Cover
SCHEMATIC
1 6

DESCRIPTION
FRONT PANEL
MIC ONE MICTWO
tone tone
SOURCE
ONE SOURCE TWO SOURCE THREE
TREBLE BASS
0 10
OUTPUT
LEVEL
pwr clip MA1705
Mixer /
70 Volt Amplifier
- + - + 0 10 0 10 0 10 0 10 0 10
Mic 1, 2: Adjust the level of signal from the corresponding Mic Input.
TONE 1, 2: Adjusts the frequency content of the microphone 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 - 3: Adjust the volume of input from the RCA Source Inputs.
Bass: Adjusts the low frequencies of the Source 2 and 3 signals only.
Treble: Adjusts the high frequencies of the Source 2 and 3 signals only.
Output Level: Adjusts the output level of the MA1705 amplifier.
Power: LED indicating power is applied to the MA1705 and the unit is on.
Clip. LED indicating overload in the MA1705 amplifier.
REAR PANEL
321
RECORD
OUTPUT
MIC TWO MIC ONE
SOURCE 1
MIC 2
on
SOURCE INPUTS
POWER AMP
INSERT
OUTPUT
WARNING:
DO NOT EXPOSETHIS EQUIPMENT TO
RAIN OR MOISTURE.
NO USER SERVICABLE PARTS INSIDE.
MODEL MA1705
MADE IN USA
www.rolls.com
SERIAL NUMBER
1705 -
RISQUE DE CHOC - NE PAS ENLEVER
PHANTOM POWER
PRIORITY ◗
21
not used not used
OUTPUT: Spring-loaded terminal for connection to the speakers.
POWER AMP INSERT: 1/4” Tip-Send, Ring-Return insert jack for.
MICROPHONE ONE and TWO: Balanced XLR inputs to be connected to dynamic
or condenser microphones.
DIP SWITCH: Contains the small switches for engaging Mic 1, 2 phantom power,
and the priority (Talk Over) functions.
SOURCE INPUTS: Stereo RCA jacks, Channels 1 - 3, for connection to stereo
sources such as AM/FM tuners, cassette players, cd players, or a jukebox.
RECORD OUT: Stereo RCA jacks, contains all mixed signals before the Master
Level control.
SPECIFICATIONS
MIXER
Input Impedance: Mic: 600 Ohms XLR balanced
Source: 22K Ohms RCA
Insert: 22K Ohms 1/4" TS unbal.
Max Input Level: Mic: -14 dBV Mic level Max
Source: 24 dBV
Insert: 24 dBV
Connectors: 2: XLR, 6: Stereo RCA, 3: 1/4" TRS, 1: 1/4” TS
Phantom Power: +12 VDC
Max Gain: Mic: 60 dBV
Source: 26 dBV
Tone Controls: +/-12 dB 100 Hz Bass
+/-12 dB 11kHz Treble
Noise Floor: Speaker Out: -67 dBV
Pre Out: -90 dBV
THD + Noise: -82 dBV
S/N Ratio: 96 dBV
Priority Attenuation: 60 dBV
POWER AMP
Recommended Load: 70 Volt line (70 Watts maximum)
Frequency Response: 60Hz to 20 kHz
Size (W x H x D): 19" x 1.75" x 5" (48 x 4.5 x 12.7)
Weight: 5.5 lbs (2.5 kg)
25

OPERATION
DIP SWITCH SETTINGS (From left to right)
SOURCE 1
MIC 2
on
PHANTOM POWER
PRIORITY ◗
21
not used not used
• If a microphone requires phantom power, move the Mic channel’s corresponding
PHANTOM POWER switch to the up position. This applies 12 volts dc phantom
power to the indicated microphone.
• Mic 2 Priority; when in the up position, all program material on Mic 1 and
Sources 2 and 3 will be “ducked” or muted when a signal is present at Mic 2.
Source 1 is left un-muted.
This function is used for paging.
• Source 1 Priority: when in the up position, Source 2,and 3 will be “ducked” or
muted by the signals at Source 1.
This function is for jukebox priority. With a jukebox connected to Source input 1,
and the Talkover switch 2 on, the other Source input signals such as background
music, will be muted and only the jukebox will be heard.
FAULT PROTECTION
The fault protection in the MA1705 limits the current to the output stage. This
mode is entered whenever the output stage is called upon for too much power, it
may also be fooled by impedances lower than four ohms - which may cause the
output stage to overheat and be irreversably damaged.
BURN WARNING!
THE FRONT PANEL OF THE MA1705 IS THE HEAT DISTRIBUTION FOR THE
OUTPUT STAGE. IF THE UNIT IS OPERATED AT HIGH VOLUMES, IT MAY
GET HOT.
CONNECTION
Inputs
Connect low impedance microphones to the Mic inputs. If a paging microphone is
being used, connect it to Mic Input 2 so it may be used with the Talk 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 1.
For recording purposes, connect a stereo RCA cable to the Record Out jacks, and
to your recording device.
Amp Insert
To connect a signal processor to the MA1705 signal, use an insert plug, or cable
wired as shown in Fig. 1. This return signal is then sent to the output level section
of the amplifier.
Output
Connect 70 Volt speakers to the Output of the MA1705 by pressing in each of the
spring-loaded terminals and inserting the proper wire into the proper terminal i.e.;
+ = red, - = black.
Connect the MA1705 to a properly grounded AC outlet.
3 4
To Amp Insert
Fig. 1