MA2152 Stereo/70v Mixer Amplifier 100w/Ch or
Contents
1. to MONO The Channel 1 Volume control will be the master volume Channel 2 is inactive Connect the load speakers to the two positive red banana jacks Make no connections to the black posts The level meters will both light and the output power into 8 Ohms is the sum of the LEDs that light DRIVING 25 OR 70 VOLT LINES The MA2152 will drive 25 or 70 Volt lines directly with no added transformers when used the following way Each channel used individually will drive 25 Volt lines directly A single 70 Volt line bay be driven when the MA2152 is in Bridged Mode In order to drive two 70 Volt lines two 8 Ohms to 70 Volt conversion transformers will be needed OPERATION DIP SWITCH SETTINGS From left to right If a microphone requires phantom power move the Mic channel s correspond ing PHANTOM POWER switch to the on position This applies 12 volts dc phan tom power to the indicated microphone e SOURCE 1 MONO this switch sums the Right and Left inputs of Source 1 to mixed dual mono inputs e Mic 1 Priority when in the on position all program material on Mic 2 and Sourc es 1 and 2 will be ducked or muted when a signal is present at Mic 1 Source 3 is left un muted This function is used for paging e Source 3 Priority when in the on position Source 1 and 2 will be ducked or muted by the signals at Source 3 This function is for jukebox priority With a jukebox connected to Source input 3 and th2. CED CON NECTIONS AND PROPER SIGNAL LEVEL SETTING INSPECTION 1 Unpack and inspect the MA2152 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 War ranty 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 Schematics 5and6 Warranty Back Cover MIXER SECTION pra R822 33K P100K X2 TREBLE 6 A L 3 Raz 33K NOTES DRAWING FOR REFERENCE ONLY ONLY AND C2 amp C3 47UF IF YOU ARE COPYING THIS STOP IT DO YOUR OWN ENGINEERING ROLLS CORPORATION SPECIFICATIONS MIXER Input Impedance M c 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 24dBV Insert 24dBV Connectors 2 XLR 8 Stereo RCA 3 1 4 TRS 1 Stereo 3 5 mm 4 Binding posts Phantom Power 12 VDC Max Gain Mic 60 dBV Source 26 dBV T
3. IN 3 1 8 3 5 mm Input jack parallels the rear panel Source 3 Input Bass Adjusts the low frequencies of the Source 1 and 2 signals only Treble Adjusts the high frequencies of the Source 1 and 2 signals only Left Right Output Adjusts that channel s output level Right Left Clip LEDs indicating clipping in the indicated MA2152 amplifier side Protect Indicates that the amplifier has reached overload and the MA2152 will need to be turned off and restarted Power LED indicating power is applied to the MA2152 and the unit is on REAR PANEL IEC Power Input Fuse Holder Connects to the enclosed IEC power cable Please replace fuse only with recommended rating 4 8 Ohm 25 Volt Output The two red banana jacks are used when the MA2152 is in Bridge Mono or 70V mode RECORD OUT Stereo RCA jacks contains all mixed signals before the Master Level controls SOURCE INPUTS Stereo RCA jacks Channels 1 3 for connection to stereo sources such as AM FM tuners cassette players cd players or video players LEFT RIGHT AMP INSERT 1 4 Tip Send Ring Return insert jack DIP SWITCH Contains the small switches for engaging Mic 1 2 phantom power Source 3 Stereo or Mono the priority Talk Over functions and the Mono Stereo select MICROPHONE ONE and TWO Balanced XLR inputs to be connected to dynam ic or condenser microphones BRIDGE SWITCH This switch selects the output configuration Bridge Mon
4. 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 se rial number improper electrical voltages or currents repair alteration or mainte nance 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 PURPO
5. SE 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 con sequential 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 02 08 MA2152 Mixer Amplifier Te A y y Mixer Amplifier ROLLS obese Sy moner somen am SE OWNERS MANUAL INTRODUCTION Thank your for your purchase of the Rolls MA2152 Mixer Amplifier The MA2152 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 may be connected to 8 or 16 ohm speakers or a 25V or 70V system NOTE THIS MANUAL ASSUMES THE USER HAS A WORKING KNOWL EDGE OF AUDIO ELECTRONICS BALANCED AND UNBALAN
6. e Talkover switch 2 on the other Source input signals such as background music will be muted and only the jukebox will be heard e MONO STEREO When down the output of the MA2152 is summed to mono Either jack can be used as a mono output FAULT PROTECTION The fault protection in the MA2152 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 Since the MA2152 is convection cooled the unit radiates heat from the front panel and depending on the load demand it may become very hot if drawn upon heavily Connects to tip SEND To Amp Insert Connects to ring Fig 1 RETURN
7. o or Stereo Dual Mono DESCRIPTION CONNECTION Inputs 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 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 3 For recording purposes connect a stereo RCA cable to the Record Out jacks and to your recording device Amp Inserts To connect a signal processor to the MA2152 signal s 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 Outputs In STEREO MODE the Right speaker is connected to the red and black banana RIGHT OUTPU connectors The Left speaker is connected to the red and black banana LEFT OUTPUT connectors Impedances should be no less then 4 Ohms In BRIDGE MONO MODE the speakers are connected to the two red BRIDGE OUTPUT connectors Connect the MA2152 to a properly grounded AC outlet There is a one second turn on delay provided to prevent possible speaker damage in case all equip ment is on a single power strip BRIDGING To bridge the MA2152 outputs together first ensure the power is off Move the BRIDGE switch to the Bridge position and set the STEREO MONO DIP Switch details on the next page
8. one Controls 12 dB 100 Hz Bass 12 dB 11kHz Treble Noise Floor Speaker out 67 dBV Pre Out 90 dBV S N Ratio 96 dBV Priority Attenuation 60 dBV POWER AMP 100 Watts RMS Ch 4 Ohms Both channels driven 70 Watts RMS Ch 8 Ohms Power Output Stereo Bridged 200 Watts RMS 8 Ohms 70V Output Matching 4 8 16 Ohms 25V Stereo 70V Mono THD lt 08 1 kHz 1 Watt Outputs RCA Record Out 5 Way binding post Power Amp Outputs Power Bandwidth 60 Hz 30 kHz 1 dB Damping Factor gt 150 Slew Rate 100 Volts microSecond Phase Shift lt 10 Deg 20 Hz 20 kHz Power 120 VAC 60 Hz 2 5A Size 19 x 3 5 x 7 5 48 x 9 x 19 cm Weight 12 lbs 5 5 kg SCHEMATIC x POWER AMP SECTION AMP INSERT 1 FRONT PANEL UBC MA2152 3 k Mixer Amplifier ROLLS 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 chan nel 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
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