Download MA2152 Stereo/70v Mixer Amplifier 100w/Ch or
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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, 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 WARRANTIES, 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 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 02/08 MA2152 Mixer / Amplifier OWNERS MANUAL 2 J2 J3A RCAX4 RCAX4 J3D RCAX4 J3C 1 LEFT IN 4 J3B RCAX4 RIGHT IN LEFT IN RIGHT IN 4.99K XLR F PC R201 5 R504 10K 5 R206 330 3 2 +12V 5 6 U5B 4560 C502 7 4560 C501 7 27PF 4560 U5A 4 3 2 1 4560 C402 -12V P4A P100K X2 U4B +12V 3 5 6 4 -12V 22K R207 C401 U4A P100K X2 P3A 1 P100K X2 P3B 3 8 SW DIP-6 SW 1E PHAN PWR R202 4.99K C202 10U R205 330 1U C102 R106 330 R102 R107 4.99K SW 1F 33k 6 7 SW DIP-6 PHAN PWR P100K X2 P4B 6 R501 10K R403 10K 6 R401 10K 2 3 C201 10U 3 XLR F PC R101 4.99K 1 2 27PF 27PF 1 1 +12V U2B 4560 27PF Q1 2N3904 7 7 R505 47K R502 47K R404 47K R402 47K +12V R208 33K C204 4560 C103 120PF U1B .001 C203 27PF 5 6 5 6 +12V 8 8 R7 C5 10U U1A 4560 1 1 1 C12 503 3 C13 503 R604 10K 6 R601 10K -12V -12V 5 6 4560 C601 27PF 1 +12V C14 503 U9B 4560 R5 & R6 IN 2152 ONLY AND C2 & C3 47UF -12V 7 J5 JAPDC C15 503 R606 22K R603 22K Text C602 27PF P100K X2 P5B 4 3 2 U9A P100K X2 P5A 1 10 R116 100K SW DIP-6 SW 1C DUCK ENABLES R901 10K 3 DRAW ING FOR REFERENCE ONLY PRODUCTION UNITS MAY VARY NOTES +12V R607 1K R10 1K RCAX4 2 1K SW 1D R9 R608 1K C207 .01 UF 47K R14 47K R1 C107 .01 UF IF YOU ARE COPYING THIS - STOP IT - DO YOUR OW N ENGINEERING +12V J4B LEFT IN J6 3.5STJK P100K P9 C106 .1 UF 4.7K R111 P100K P8 .1 UF R211 4.7K C206 4.7K R210 R110 4.7K RIGHT IN -12V RCAX4 J4A 4560 U2A C205 27PF -12V Phan Pwr Reg 3 2 P100K P2 100K LEVEL R209 4.7K LEVEL 3 2 C105 27PF 4 4 LEVEL P100K P1 R109 4.7K C104 120PF R108 33K 3 2 11 330 R105 2 3 1 3 2 5 6 +12V 1 1 1N400X -12V 3 P6A P100K X2 BASS C805 .047 BASS C807 .047 MONO +12V U11B 4560 R824 1M R825 22K R823 33K SW 1A SW DIP-6 +12V -12V R5 1.1K C3 1000UF H1E HD5 H1D HD5 7 Q5 H1C HD5 R822 33K 4 22K R815 1 47K R602 7 27PF H1B HD5 P7B P100K X2 5 6 4 4560 U11A 1M R814 R813 33K 4560 U12B +12V -12V 220K R16 D13 1N4148 C4 7 H1A HD5 R6 1.1K 33K R821 6 TREBLE C808 220PF R820 22K P6B P100K X2 6 47K R15 10U R812 -12V 1 3 2 1 5 6 LM358 C904 U3B 33K P7A P100K X2 TREBLE R819 33K R811 3 C806 220PF R810 22K C2 1000UF 1N400X D1 4560 47K 5 R904 6 47K 7 33K R809 33K LM358 R818 U10B D3 -12V U10A 47K 4560 -12V U3A C902 27PF +12V 330K DUCK RECTIFIER R903 1N4148 D14 DUCK AMP R808 47K R605 SW 1B SW DIP-6 3 C901 .1 UF 2 R902 10K 4 C101 1U SW DIP-6 SOURCE 3 (1) MONO 1 3 6 9 4 2 5 2 5 2 4 8 4 8 4 5 8 4 1 8 Back Cover 8 Warranty 2 5 and 6 2 Schematics 1 5 8 Specifications 4 4 5 Operation 8 3 2 Connection 3 2 12 Description 4 1 1 1 5 TABLE OF CONTENTS Introduction Inspection Table of Contents 1 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 Warranty Here button, or complete the Warranty Registration Card and return it to the factory. 5 R3 1K 1 R4 1K Murray, Utah 84107 USA MIXER BOARD Document Number: MA2152_Mixer .SCH Date: 10-Apr-2007 Rb MX15 ROLLS CORPORAT ION R826 22K 5968 S 350 W C809 503 R213 22K 1N4148 J4C RCAX4 RECORD OUT J4D RCAX4 1N4148 R827 1M D12 5 R17 1K 1K R18 -12V 4 C1 27PF 47K 4560 U12A D11 Size: Title J113 Q6 J113 R212 22K R816 22K 3 2 R2 NOTE: THIS MANUAL ASSUMES THE USER HAS A WORKING KNOWLEDGE OF AUDIO ELECTRONICS, BALANCED AND UNBALANCED CONNECTIONS, AND PROPER SIGNAL LEVEL SETTING. 4 Sheet 1 of 1 Rev: A 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. 6 J1 INTRODUCTION MIXER SECTION 6 SPECIFICATIONS DESCRIPTION MIXER Input Impedance: Mic: Max Input Level: Mic: Connectors: Phantom Power: Max Gain: Tone Controls: Noise Floor: S/N Ratio: Priority Attenuation: POWER AMP Power Output, Stereo: 600 Ohms XLR balanced Source: 22K Ohms RCA Insert: 22K Ohms 1/4” TS unbal. -14 dBV Mic level Max Source: 24 dBV Insert: 24 dBV 2: XLR, 8: Stereo RCA, 3: 1/4” TRS, 1: Stereo 3.5 mm 4: Binding posts +12 VDC Mic: 60 dBV Source: 26 dBV +/-12 dB 100 Hz Bass +/-12 dB 11kHz Treble Speaker out: -67 dBV Pre Out: -90 dBV 96 dBV 60 dBV 100 Watts RMS/Ch. 4 Ohms (Both channels driven) 70 Watts RMS/Ch. 8 Ohms Bridged: 200 Watts RMS - 8 Ohms/70V Output Matching: 4, 8, 16 Ohms, 25V Stereo, 70V Mono THD: <.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: > 150 Slew Rate: 100 Volts/microSecond Phase Shift: <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) FRONT PANEL 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. 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 SCHEMATIC POWER AMP SECTION 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 dynamic or condenser microphones. BRIDGE SWITCH: This switch selects the output configuration; Bridge Mono, or Stereo / Dual Mono. 5 2 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 equipment 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), 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. 3 OPERATION DIP SWITCH SETTINGS (From left to right) • If a microphone requires phantom power, move the Mic channel’s corresponding PHANTOM POWER switch to the on position. This applies 12 volts dc phantom power to the indicated microphone. • SOURCE 1 MONO; this switch sums the Right and Left inputs of Source 1 to mixed dual-mono inputs. • Mic 1 Priority; when in the on position, all program material on Mic 2 and Sources 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. • 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 the Talkover switch 2 on, the other Source input signals such as background music, will be muted and only the jukebox will be heard. • 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. To Amp Insert Fig. 1 4