Meyer Sound LF manual

Keep these important operating instructions. Check www .meyerso und.com for updates. OPERATING INSTRUCTIONS Acher on ® Screen Channel Loudspeakers Acheron 100, Acheron 80, and Achero n LF[...]

ii DECLARATION OF CONFORMITY ACCORDIN G TO ISO/IEC GUIDE 22 AND EN 45014 © 2009, 2010 Meyer Sound. All rights reserved. Achero n Operating Instructions, PN 05.188.0 05.01 B The contents of this manual ar e furnished fo r informational purposes only , are subject to change without notice, and should not be con- strued as a commitment by Meyer Sound[...]

iii SYMBOLS USED These symbols indicate important safety or operating featu res in this booklet and on the chassis: IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all inst ructions. 5. Do not use this loudspeaker near water . 6. Clean only with dry cloth. 7. Do not block any ven[...]

iv SAFETY SUMMARY English  T o reduce the risk of electric shock, dis- connect the loudspeaker from the AC mains before installing audio cable. Reconnect the power cord only after making all signal connections.  Connect the loudspeaker to a tw o-pole, three-wir e grounding mains receptacle. The receptacle must be connected to a fuse or circui[...]

v CONTENTS Chapter 1: Introduction 7 How to Use This Manual 7 Acheron Screen Channel Loudspeaker 7 Chapter 2: Power Requirements 11 AC Connector 11 AC Power Distribution 12 Acheron Voltage Requirements 12 Acheron Current Requirements 12 Powering Up the Acheron 13 Electrical Safety Guidelines 13 Chapter 3: Amplification and Audio 15 Audio Connectors[...]

CONTENTS vi[...]

7 CHAPTER 1: INTR ODUCTION HOW TO USE THIS MANUAL Make sure to r ead these operating instructions in their entirety befor e configuring a system with Acher on ® loud- speakers. In particular , pay close attention to material related to safety issues. As you read these operating instructions, you will encounter the following icons for notes, tips, [...]

CHAPTER 1: INTRODUCTION 8 Boasting a frequency r esponse of 38 Hz to 17 kHz at ±4 dB, as well as a generous peak output of 139 dB at 1 meter with very low distortion, the Acher on stands up to the most demanding of digital soundtracks, maintaining a wide dynamic range and full fidelity . Designed and manufactur ed at Meyer Sound's headquarter[...]

ACHERON OPERATING I NSTRUCTIONS 9 Acheron LF Loudspeaker The Achero n LF loudspeaker can be paired with the Acheron 80 or Ac heron 100 screen channel loudspeaker to deliver the low-frequency head room requir ed by larger t he- atres. The self-p owered Acheron LF with dual 15-inch driv- ers boosts the headr oom on the LCR channels by converting each[...]

CHAPTER 1: INTRODUCTION 10[...]

11 CHAPTER 2: POWER REQUIR EMENTS The Achero n loudspeaker combines advanced loudspeaker technology with equally advanced power capabilities. Understanding power distribution, voltage and curr ent requir ements, and electrical safety guidelines is critical to the safe operation of the Acher on. AC CONNECTOR The Achero n AC connector supplies AC pow[...]

CHAPTER 2: POWER REQUIREMENTS 12 AC POWER DISTRIBUTION All components in an audio system (self-powered loud- speakers, processors, etc.) must be pr operly connected to an AC power distribution system, to ensure that AC line polarity is preserved and that all grounding points ar e con- nected to a single node or common point using the same cable gau[...]

ACHERON OPERATING I NSTRUCTIONS 13 ■ Burst Curr ent — The maximum rms current during a period of around one second. The Burst Current is used as a rating for magnetic breakers. It is also used fo r cal- culating the peak voltage dr op in long AC cable runs according to t he following formula: V pk (drop) = I pk x R (cable total) ■ Ultimate Sh[...]

CHAPTER 2: POWER REQUIREMENTS 14 ■ Make sure the AC po wer cable for the loudspeaker has the approp riate power plug (on the other end) for the area in which you will operate the loudspeaker . ■ Do not operate the unit if the power cable is frayed or broken. ■ Keep all liquids away fro m the Acheron to avoid hazar ds from electrical shock.[...]

15 CHAPTER 3: AMPLIFICATION AND AUDIO The Achero n drivers are powered by a two-channel propri- etary Meyer Sound amplifier with MOSFET output stages. The audio signal is pr ocessed with an electronic cr ossover , cor- rection filters fo r phase and frequency resp onse, and driver protection cir cuitry . Each channel has peak and rms limiters that [...]

CHAPTER 3: AM PLIFICATION AND AUDIO 16 NOTE: Most source devices ar e capable of driving loads no smaller than 10 times their output impedance. CAUTION: Make sure that all cabling for looped loudspeakers is wired co rrectly (Pin 1 to Pin 1, Pin 2 to Pin 2, and so forth) to pr event the polarity from being r eversed. If one or more loud- speakers in[...]

ACHERON OPERATING I NSTRUCTIONS 17 AMPLIFIER COOLING SYSTEM The Acher on uses a forced-air cooling system with two fans (one variable-speed, ultra low-noise primary fan and one reserve fan) to pr event the amplifier module fr om overheat- ing. The fans draw air in thr ough ducts on the front of the cabinet, over the heat sink, and out the r ear of [...]

CHAPTER 3: AM PLIFICATION AND AUDIO 18[...]

19 CHAPTER 4: INTEGRATING ACHER ON LF LOUDSPEAKERS INTEGRATING ACHERON LF LOUDSPEAKERS T o meet the SPL and low fr equency headroom r equirements of lar ge rooms, the Acher on 100 or Acheron 80 can be daisy-chained with the Acheron LF loudspeaker , creating a system with three low fr equency drivers and one high fre- quency driver . Adding an Acher[...]

CHAPTER 4: INTEGRATING ACHERON LF LOUDSPEAKERS 20 GALILEO LOUDSPEAKER MANAGEMENT SYSTEM The Galileo ® loudspeaker management system was designed by Meyer Sound as a compr ehensive solution for driving and aligning loudspeakers, especially those com- prised of its self-powered loudspeakers. A range of Galileo systems are available, depending on the[...]

21 CHAPTER 5: MOUNTING Strategically placed 3/8-inch thr eaded points on the side corners of the Acheron cabinet allo w the unit to be secured to floors with uptilt or downtilt using the optional moun ting brackets. The Acheron can also be mounted on top of the Acheron LF lo udspeaker , also with uptilt or downtilt, using the optional stacking brac[...]

CHAPTER 5: MOUNTING 22 Floor Mounting Acher ons and Acheron LFs T o floor mount an Acher on or Acheron LF: 1. Remove the two 3/8-16 x 1.5-inch scr ews at the bottom of each loudspeaker side (four total). 2. Secure the left bracket to the left side of the loudspeaker with two of the r emoved screws and two of the included flat washers. ■ T o mount[...]

ACHERON OPERATING I NSTRUCTIONS 23 Floor Mount Downtilt Ang les When the floor mount brackets ar e oriented with the bracket’ s lar ge end toward the r ear of the loudspeaker , the Acheron can be mounted with downtilt angles of 3-18 degrees in 3-degr ee increments. The small end of the bracket attaches to the loud speaker using the top hole. The [...]

CHAPTER 5: MOUNTING 24 ACHERON STACKING BRACKET One Acheron can be stacked on to p of the Acheron LF and secured with the Acher on stacking brackets. The stacked Acheron can be mounted with downtilt and uptilt angles of 0–16 degrees. NOTE: The orientation of the Acheron to the Acheron LF with the stacking b racket was carefully optimized to minim[...]

ACHERON OPERATING I NSTRUCTIONS 25 3. Remove the two 3/8-16 x 1.5-inch scr ews at the top of each side of the Acheron LF (four total). These screws will be used to secure the st acking bracket to the Acheron LF. 4. Remove the two 3/8-16 x 1.5-inch scr ews at the bottom of each side of the Acher on (four total). These screws will not be needed for i[...]

CHAPTER 5: MOUNTING 26 Stacking Acherons with Downtilt and Uptilt The Achero n stacking brackets can mount Acherons with either downtilt or uptilt. Av ailable angles are anywhere from 0–16 degrees. The dir ection in which the brackets are o ri- ented determines whether the loudspeaker can be mounted with downtilt or uptilt. CAUTION: When stacking[...]

ACHERON OPERATING I NSTRUCTIONS 27 Stack Mount U ptilt Angles When the stacking brackets are o riented with the bracket’ s lar ge end toward the front of the loudspeakers, the Acheron can be mounted with uptilt angles of up to 16 degr ees. Make sure to install the brackets so the rubber gasket faces the loudspeaker . This ensures that the loudspe[...]

CHAPTER 5: MOUNTING 28[...]

29 CHAPTER 6: THE RMS REMOTE MONITORING SYSTEM An optional RMS remote monitoring system module can be installed in the Achero n, allowing it to be connected to an RMS network. RMS allows real-time monitoring of multiple Meyer Sound self-power ed loudspeakers from a Windows- based computer . The RMS host computer communicates with Meyer Sound loudsp[...]

CHAPTER 6: THE RMS REMOTE MONITORING SYSTEM 30 The RMS software displays all loudspeakers on the network in a panel with icons, Meter views, and T ext views that can be customized to suit your needs. Lo udspeaker data is updated 2–5 times per second. Ind ividual loudspeakers can be physically identified with the Wink option in RMS, which lights t[...]

ACHERON OPERATING I NSTRUCTIONS 31 Reset Button Pressing the Reset button causes the RMS module’ s firm- ware to r eboot; this will not affect whether the loudspeaker is commissioned (which is stored in flash memory). Y ou can simultaneously press the Reset and Service buttons to r eset the RMS module and decommission the loudspeaker fr om the ne[...]

CHAPTER 6: THE RMS REMOTE MONITORING SYSTEM 32[...]

33 CHAPTER 7: SYSTEM DESIGN AND INTEGRATION T OOLS Meyer Sound offers two compr ehensive tools to assist with the acoustical and functional r equirements of system design and optimization. This chapter intr oduces MAPP Online Cinema, Meyer Sound’ s patented online acoustical pr edic- tion tool, and SIM 3, a comprehensive system for measur e- ment[...]

CHAPTER 7: SYSTEM DESIGN AND INTEGRATION TOOLS 34 Using MAPP Online Cinem a MAPP Online Cinema is compatible with the following oper- ating systems: ■ Windows ■ Linux ® ■ Unix ® ■ Mac OS ® 10.4 and later Downloading and Installing MAPP Online Cinema T o use MAPP Online Cinema, you can register at the follo w- ing link: http ://meyersound[...]

35 APPENDIX A: ACHERON 80 AND ACHER ON 100 SPECIFICATIONS Acheron 80 and Acher on 100 Sp ecifications ACOUSTICA L Operating Frequency Range 37 Hz – 18 kHz Note: Rec ommended maximum operating frequency rang e. Response de pends on loading conditions and room acoustics. Frequency Response 38 Hz – 17 kHz ±4 dB Note: Measured free field with 1/3 [...]

APPENDIX A: ACHERON 80 AND ACHERON 100 SPECIFICATIONS 36 Nominal Input Sensitivity 10 dBV (3.2 V rms, 4.5 V peak) continuous is typically the onset of li miting for noise and music Input Level Audio source must be capable of producing +20 dBV (10 V rms, 14 V peak) into 600 Ω to pro- duce the maximum peak SPL over the operating bandwidth of the lou[...]

ACHERON OPERATING I NSTRUCTIONS 37 ACHERON 80 AND ACHER ON 100 COMPLIANCE ACHERON 80 DIMENSIONS Shock 30 g 11 msec half-s ine on each of 6 sides Vibration 10 Hz – 55 Hz (0. 010 m peak-to-peak excursion) Acheron 80 and Acher on 100 Sp ecifications Acheron 80 Dimensions 31.00 [787mm] 20.50 [521mm] 35.00 [889mm] 21.00 [533mm] 20.00 [508mm] 10.75 [27[...]

APPENDIX A: ACHERON 80 AND ACHERON 100 SPECIFICATIONS 38 ACHERON 100 DIMENSIONS Acheron 100 Dimensions 31.00 [787mm] 20.50 [521mm] 35.00 [889mm] 21.00 [533mm] 20.00 [508mm] 10.75 [273mm][...]

39 APPENDIX B: ACHER ON LF SPECIFICATIONS Acheron LF Specifications ACOUSTICA L Operating Frequency Range 37 Hz – 370 Hz Note: Rec ommended maximum operating frequency rang e. Response de pends on loading conditions and room acoustics. Frequency Response 38 Hz – 340 Hz ±4 dB Note: Measured free field with 1/3 octave frequenc y resolution at 4 [...]

APPENDIX B: ACHERON LF SPECIFICATIONS 40 Output Power 2250 W tota l (1125 W low channels) Note: Ampl ifier wattage ra ting based on the maximum uncli pped peak voltag e the amplifier will produce into the nominal load impedance: l ow frequency channels, 67 V rms (95 V peak) into 4 ohms. T o tal Output 4500 W peak THD, IM TIM <.02% Load Capacity [...]

ACHERON OPERATING I NSTRUCTIONS 41 ACHERON LF COMPLIANCE ACHERON LF DIMENSIONS Acheron LF Dimensions 31.00 [787mm] 20.50 [521mm] 36.18 [919mm] 9.90 [251mm] 20.00 [508mm][...]

APPENDIX B: ACHERON LF SPECIFICATIONS 42[...]

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Meyer Sound Labo ratories In c. 2832 San Pablo Avenue Berkeley, CA 94702 www.meyersound.com T: +1 510 486.1166 F: +1 510 486.8356 © 2009, 2010 Meyer Sound. All rights reserved. Acheron Operating Instructions, PN 05.188.005.01 B[...]