Operating Instructions
Contents
1. Im Inneren diesem Lautsprecher herrschen potentiell gef hrliche Spannungen Nicht versuchen das Ger t zu ffnen Es enth lt keine vom Benutzer reparierbaren Teile Reparaturen d rfen nur von ausgebildetem Kundenienstpersonal durchgef hrt werden Espa ol Para reducir el riesgo de descarga el ctrica desconecte de la red el altoparlante antes de instalar el cable de se alizaci n de interfaz de la segnale Vuelva a conectar el conductor flexible de alimentaci n solamente una vez efectuadas todas las interconexiones de se alizatci n Conecteelaltoparlante aun tomacorriente bipolar y trifilar con neutro de puesta a tierra El tomacorriente debe estar conectado a la protecci n de derivaci n apropiada ya sea un fusible o un disyuntor La conexi n a cualquier otro tipo de tomacorriente puede constituir peligro de descarga el ctrica y violar los c digos el ctricos locales No instale el altoparlante en lugares donde haya agua o humedad excesiva No deje que en el altoparlante entre agua ni ning n objeto extra o No ponga objetos con l quidos encima de la unidad ni cerca de ella Para reducir el riesgo de sobrecalentamiento no exponga la unidad a los rayos directos del sol ni la instale cerca de artefactos que emiten calor como estufas o cocinas Este altoparlante contiene niveles de voltaje peligrosos en potencia Nointente desarmar la unidad pues no contiene piezas que puedan ser repardas por el usuario Las repa2. air heatsinks intake A variable speed primary fan runs continuously with an inaudible operating noise of 22 dBA at 1 m at its slowest speed The speed of the primary fan begins increasing when the temperature of the heatsinks reaches 42 C The fan reaches full speed at 62 C and is barely audible near the cabinet even without an audio signal In the unusual event that the heatsink temperature reaches 74 C the secondary fan turns on it turns off when the temperature decreases to 68 C The secondary fan is audible at close proximity without an audio signal and turns on in response to e primary fan failure check its status immediately e accumulation of dust in the cooling system path e a prolonged period of high source levels in hot temperatures or direct sunlight e driver failure TROUBLESHOOTING NOTE In the highly unlikely event that the secondary fan does not keep the temperature below 85 C the DS 2P automatically shuts down until AC power is removed and reapplied If the DS 2P shuts down again after cooling and reapplying AC power contact Meyer Sound for repair information Rigging The DS 2P weighs 221 lb 100 kg The maximum recom mended load fora single cabinet with aircraft pan fittings is 600 Ib 273kg This working load is based on a 5 1 safety factor The DS 2P has six rigging brackets three on top and bottom Each bracket is capable of supporting the full working load of the cabinet There are f
3. band cancellation decreased overall level indicates polarity reversal NOTE Do not attempt to check more than two adjacent speakers in one test Detecting polarity reversal among more than two speakers is difficult and may damage the drivers in the cabinet with reversed polarity 11 Array Design Array Design for Low Frequencies Although the DS 2P is a called a mid bass speaker it still functions in the frequency realm of a subwoofer especially when used as a stand alone subwoofer without the 650 P or PSW 2 Subwoofer and mid hi speaker array design differ because frequencies below 125 Hz are mostly omnidirectional directionality increases with frequency However when several subwoofers are arrayed the low frequencies can be focused This section introduces some of the fundamental concepts for designing sub woofer arrays The coverage patterns of two DS 2Ps in a horizontal array interfere with each other such that the horizontal coverage narrows without affecting the vertical coverage A vertical array of two DS 2Ps narrows the vertical without affecting the horizontal coverage Due to the larger distance between drivers in vertical arrays the vertical coverage narrows at a more significant rate than does the horizontal coverage for horizontal arrays given the same array size Increasing the number of horizontal or vertical DS 2Ps in the array increases the corresponding H or V LF directional control A properly des
4. a full range signal to both the DS 2 and Sub outputs e The DS 2 and Sub 6 switches channels 1 and 2 only toggle the polarity for the DS 2 and Sub outputs e The Mid Hi DS 2 and Sub outputs channels 1 and 2 only each have their own gain control and mute switch POLARITY NOTE The polarity for Meyer self powered speakers may be reversed using the input polarity switch on the user panel The LD 1A also allows polarity reversal with the DS 2 o and Sub switches for speakers connected to the DS 2 and Sub outputs When making polarity decisions in applications that include the LD 1A check the state of all polarity switches Complete Systems The following Meyer speakers are mentioned in the example applications MSL 4 CQ __ Self powered mid hi speaker 650 P Self powered subwoofer DS 2 Externally amplified mid bass speaker The Meyer self powered speakers listed above have a loop connection to send the input signal to another speaker Full range signals may be applied to all Meyer self powered subwoofers because they have built in active crossovers that filter mid hi frequencies LD 1A with MSL 4 DS 2P and 650 P Although the DS 2P can be used as a stand alone sub woofer it is most effectively employed with the 650 P to enhance low frequency LF power and clarity The LD 1A is an effective tool to control this configuration containing three subsystems and two crossover points With the DS 2 amp Sub Crossover
5. even the most carefully assembled sound systems be analyzed with precise measurement tools We recommend using the Meyer SIM System II Sound Analyzer and CP 10 Parametric Equalizer to e assist the process of choosing and configuring speakers e measure propagation delays between subsystems to set the correct polarity and delay times e measure and equalize variations in frequency response caused by the acoustical environment and the placement and interaction of speakers Contact Meyer Sound for assistance with your application We recommend using the Meyer LD 1A Line Driver to integrate different types of Meyer self powered speakers into a complete system The LD 1A has two channels equipped to control a full range main system and six auxiliary channels for down fill front fill and delay systems The LD 1A maintains signal integrity for long cable paths and provides the following useful functions e The Lo Cut switch activates a high pass filter 160 Hz 12 dB oct Q 0 8 that performs a crossover function for the Mid Hi output e The DS 2 amp Sub Crossover switch channels 1 and 2 only activates a crossover network optimized for the DS 2P when used with the PSW 2 or 650 P With the switch in frequencies below 80 Hz are sent to the Sub output for the 650 P and above 80 Hz to the DS 2 output When the subwoofer is used without the DS 2P or the DS 2P is used alone as a subwoofer the switch should be out which sends
6. presents a dynamic load to the AC mains which causes the amount of current to fluctuate between quiet and loud operating levels Since different types of cables and circuit breakers heat up and trip at varying rates it is essential to understand the types of current ratings and how they correspond to circuit breaker and cable specifications The maximum continuous RMS current is the maximum RMS current over a duration of at least 10 seconds It is used to calculate the temperature increase in cables which is used to select cables that conform to electrical code standards It is also used to select the rating for slow reacting thermal breakers The maximum burst RMS current is the maximum RMS current over a one second duration It is used to select the rating for most magnetic breakers The maximum instantaneous peak current during burst is used to select the rating for fast reacting magnetic breakers and to calculate the peak voltage drop in long AC cables according to the formula VPkaop Ipk x Rtotal cable Use the table below as a guide to select cables and circuit breakers with appropriate ratings for your operating volt age DS 2P Current Ratings Max Continuous RMS Max Burst RMS Max Peak During Burst The minimum electrical service amperage required by a system of Meyer speakers is the sum of their maximum continuous RMS currents We recommend allowing an additional 30 above the minimum amperage to
7. prevent peak voltage drops at the service entry TROUBLESHOOTING NOTE In the unlikely case that the circuit breakers trip the white center buttons pop out do not reset the breakers Contact Meyer Sound for repair information Safety Issues Pay close attention to these important electrical and safety issues Use a power cord adapter to drive the DS 2P eege from a standard 3 prong outlet NEMA 5 15R 125 V max earth ground 2D chassis ground The DS 2P requires a grounded outlet Always use a grounding adapter when connecting to ungrounded outlets e sof Do not use a ground lifting adapter or cut the AC cable ground pin A Keep all liquids away from the DS 2P to avoid hazards from electrical shock Do not operate the unit if the power cables are frayed or broken Tie wrap anchors on the amplifier chassis provide strain relief for the power and signal cables Insert the plastic tie wraps through the anchors and wrap them around the cables Power Connector Wiring Conventions Use the following AC cable wiring diagram to create international or special purpose power connectors bluaz _ brown hot neutral yellow green earth ground chassis AC cable color code If the colors referred to in the diagram don t correspond to the terminals in your plug use the following guidelines e Connect the blue wire to the terminal marked with an N or colored black e Connect the brown
8. switch in the DS 2 and Sub outputs each receive signals optimized for the frequency response capabilities of the DS 2P and 650 P The MSL 4 is driven from the CH 1 Mid Hi output with the Lo Cut filter in to minimize the overlap in frequency response with the DS 2P and 650 P Set the 650 P to the opposite polarity to the MSL 4 and DS 2P Input CH 1 Set the 650 P to the opposite polarity to the DS 2P and MSL A LD 1A with MSL 4 DS 2P CQ and 650 P This example shows the LD 1A integrating a complete system of self powered speakers for a large venue Although the diagram shows half of the system with channels 1 3 and 5 channels 2 4 and 6 can be used with identical connections for the other half The MSL 4 DS 2P and CQ arrays are flown the 650 Ps are on the floor The CH 1 Mid Hiand CH 3 outputs drive the inner three and outer two speakers of the MSL 4 array applying appropriate levels for speakers directed at different distances The diagram shows the additional mid hi output created by connecting the CH 1 Loop to the CH 3 input Using a Y connection at the CH 1 input as shown for the down fills accomplishes the same signal routing The Lo Cut and Array EQ switches for both channels should be in The Lo Cut filters eliminate the LF rise caused by the frequency response overlap between the MSL 4 and DS 2P 650 P systems The Array EQ filters minimize the MSL 4 array s low mid rise The CH 1 DS 2 and Sub outputs drive th
9. technicians with access to a test bench can verify proper operation for the power supply and amplifier system with The Meyer Sound Self Powered Series MP 2 and MP 4 Field Verification Procedure part 17 022 066 01 contact Meyer Sound to receive this document All other users should contact Meyer Sound or an authorized Meyer service center If the voltage decreases below the lower bound of either operating range known as a brown out period the supply uses current from its storage circuits and continues to function briefly The unit turns off if the voltage does not increase above the threshold before the storage circuits are depleted The length of time that the DS 2P continues to operate during brown out depends on how low the voltage drops and the audio source level during this period If the voltage fluctuates within either operating range automatic tap selection stabilizes the internal operating voltage This tap selection is instantaneous and there are no audible artifacts If the voltage increases above the upper bound of either range the power supply turns off rapidly preventing damage to the unit If the DS 2P shuts down due to either low or high voltage the power supply automatically turns on after three seconds if the voltage has returned to either normal operating range If the DS 2P does not turn back on after ten seconds remove AC power and refer to the TROUBLE SHOOTING NOTE above Current Requirements The DS 2P
10. wire to the terminal marked with an L or colored red e Connect the green and yellow wire to the terminal marked with an E or or colored green or green and yellow Audio Input The DS 2P presents a 10 kQ balanced input impedance to a three pin XLR connector wired with the following convention Pin 1 220kQ to chassis and earth ground ESD clamped Pin2 Signal f Pin3 Signal __ j Differential Inputs Case Earth AC ground and chassis Shorting an input connector pin to the case can form a ground loop and cause hum Pins 2 and 3 carry the input as a differential signal their polarity can be reversed with the input polarity switch on the user panel If the switch is in the up position pin 2 is hot relative to pin 3 resulting in a positive pressure wave when a positive signal is applied to pin 2 Use standard audio cables with XLR connectors for balanced signal sources TROUBLESHOOTING NOTE If abnormal noise hum hiss popping is produced from the loudspeaker discon nect the audio source from the speaker If the noise stops then the problem is not within the loudspeaker check the audio input and AC power A single source can drive multiple DS 2Ps with a paralleled input loop creating an unbuffered hardwired loop connection Make certain that the source equipment can drive the total load impedance presented by the paralleled input circuit For example since the input impedance of a singl
11. aker avoid exposing it to direct sunlight Do not install the unit near heat emitting appliances such as a room heater or stove This loudspeaker contains potentially hazardous voltages Do not attempt to disassemble the unit The unit contains no user serviceable parts Repairs should be performed only by factory trained service personnel Fran ais Pour r duire le risque d lectrocution d branchez la prise principale de I haut parleur avant d installer le c ble d interface allant l audio Ne rebranchez le bloc d alimentation qu apr s avoir effectu toutes les connections Branchez lhaut parleur dans une prise de courant 3 d rivations deux p les et la terre Cette prise doit tre munie d une protection ad quate fusible ou coupe circuit Le branchement dans tout autre genre de prise pourrait entra ner un risque d lectrocution et peut constituer une infraction la r glementation locale concernant les instal lations lectriques Ne pas installer l haut parleur dans un endroit o il y a de leau ou une humidit excessive Ne pas laisser de l eau ou tout objet p n trer dans I haut parleur Ne pas placer de r cipients contenant un liquide sur cet appareil ni proximit de celui ci Pour viter une surchauffe de l haut parleur conservez la l abri du soleil Ne pas installer proximit d appareils d gageant de la chaleur tels que radiateurs ou appareils de chauffage Ce haut pa
12. distance of the measurement position from the the flown and subwoofer systems DS 2P and DS 2 Although it is preferable to employ the DS 2P in a completely self powered system the DS 2P can be used with the DS 2 externally amplified mid bass speaker if e the D 2 CEU is set to the maximum output level e the DS 2 amplifier is set to 26 dB gain e the DS 2P is set to the same polarity as the DS 2 amplifier CP 10 EO level control at maximum 26 dB gain Set the DS 2P and the DS 2 amplifier to the same polarity 10 Driver Troubleshooting Troubleshooting with TPL The TPL LED can indicate serious driver problems if interpreted correctly If one DS 2P in a system exhibits substantially more TPL activity than others receiving the same audio signal then one or both drivers in that unit may have a short circuit This is a potentially dangerous condition for the electronics shut the DS 2P down immediately The TPL circuit does not activate if there is no power dissipation in the driver regardless of the input signal level Therefore if all DS 2Ps in a system receiving the same audio signal exhibit TPL activity except one then that unit may have an open voice coil disconnect it and contact Meyer Sound for repair information NOTE The Remote Monitoring System RMS provides precise information about peak power peak voltage and average voltage VU for each amplifier channel enabling a more complete driver dia
13. e DS 2P and 650 P systems with the DS 2 amp Sub Crossover switch in Set the MSL 4 and DS 2P to the same polarity The polarity of the 650 P depends on the height and distance of the measurement position from the subwoofer and flown systems CH 5 controls the CQ down fill system Since the main system is more powerful than the down fill system to project farther into the venue the main system is audible in the down fill s coverage area To insure that the speakers combine properly in the intersecting coverage area e Set the CQ to the opposite polarity to the MSL 4 to phase align the mid hi frequencies and minimize the MSL 4 s LF down lobe e Use the CH 5 Lo Cut filter to eliminate the LF rise caused by the overlap in frequency response with the 650 P and DS 2P systems e Delay the down fill to compensate for the propa gation delay between the down fill and main systems in the intersecting coverage area We recommend that the entire system be measured phase aligned and equalized using the SIM System II Sound Analyzer and CP 10 Parametric Equalizer MSL 4 Mid Hi Mid Bass Input CH 3 Input Output CH 5 650 P Subwoofers Set the CQ to the opposite polarity to the MSL 4 and DS 2P The polarity of the 650 P depends on the height and
14. e DS 2P is 10 kQ cascading 20 DS 2Ps produces a balanced input impedance of 500 Q If a 150 Q source is used the 500 Q load results in a 2 28 dB loss Amplification and Protection Circuitry Each driver in the DS 2P is powered by one channel of the Meyer MP 2 a 1240 W amplifier 620 W ch utilizing complementary power MOSFET output stages class AB H The following sections discuss the MP 2 s limiting circuitry and the two fan cooling system TruPower Limiting System Conventional limiters assume that the resistance of a speaker remains constant and set the limiting threshold by measuring voltage only This method is inaccurate because the speaker s resistance changes in response to the frequency content of the source material and thermal variations in the speaker s voice coil and magnet Conventional limiters begin limiting prematurely which under utilizes system headroom and deprives the speaker of its full dynamic range The TruPower limiting TPL system accounts for varying speaker impedance by measuring current in addition to voltage to compute the power dissipation and voice coil temperature TPL improves performance before and during limiting by allowing the speaker to produce its maximum SPL across its entire frequency range TPL also extends the lifetime of the drivers by controlling the temperature of the voice coil When the safe continuous power level is exceeded a single limiter engages affecting both a
15. eee cece eeeeeeeeeteteeeeeeeeees 10 AG Ge EE 4 Array D SIOM sccseivecssstesiiestelcieiceeee eee 12 Audio Tut 0 ET 6 Safety SUMMATY sessies 13 Amplification and Protection Circuitry 6 Specifications cc ceeceesseeeceeeeeeeeeeeesseeeeeeeseeseneeeeess 14 Rigging Mains circuit breakers Driver Excursion Clamp Low Limit red Exe Clamp SCH LO Limit O Active Speaker Fault 10K a Balanced Input Polarity ie USI Power LED green red Input polarity switch Signal input and loop connectors Remote Monitoring Mains AC inlet Tie wrap ancho ZADO A PERSONAL T CNICO CALIFICADO ACHTUNG GEH USE NICHT FFNEN WARTUNG UND REPARATUR NUR DURCH ELEKTROFACHKRAFTE UK WARNING THIS APPARATUS MUST BE EARTHED NO OPERATOR SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL ATTENTION ENTRETIEN ET REPARATIONS INTERNES NE SONT AUTORISEES QU AU PERSONNEL TECHNIQUE QUALIFI THIS PRODUCT MUST BE GROUNDED Auto Voltage Select 95 125V 208 235V 1400W RMS MAX 1400W RMS MAX E m Meyer fa Meyer System panel Meyer Sound Berkeley CA USA L Remote Monitoring System if RMS is installed Rear User Panel shown with the optional Remote Monitoring System RMS panel European User Pan
16. el with IEC 309 connector Dimensions All units in inches Front Side Top La 30 00 14 25 A 30 00 28 75 56 75 Y 5 50 Introduction The Meyer DS 2P self powered mid bass loudspeaker is intended to supplement Meyer self powered subwoofers but can also be used as a stand alone subwoofer When used with a Meyer subwoofer and crossover such as the Meyer LD 1A Line Driver frequencies below 80 Hz are sent to the subwoofer and the mid bass frequencies are sent to the DS 2P allowing each speaker to function in its most efficient range See page 8 for an overview of the LD 1A contact Meyer Sound for additional infor mation The DS 2P contains independent amplifier and control electronics for two 15 cone drivers in a compact folded horn enclosure This integrated design improves perfor mance durability and reliability eliminates amplifier racks and simplifies setup and installation The minimum configuration of two DS 2Ps have the following acoustical specifications 4 dB 50 160 Hz 60 60 200 Hz gt 120 dB 120 H x 120 V Frequency Response Phase Response Dynamic Range Coverage The DS 2P s trapezoidal shape facilitates the creation of speaker arrays that maximize the coverage area and SPL for the size of the array Rigging hardware is provided to safely suspend the DS 2P in elevated installations The DS 2P can be equipped to operate with the Remote Mon
17. gnostic than the TPL LEDs Contact Meyer Sound for more information about RMS Driver Replacement To determine whether a driver is functioning properly or replace a damaged driver contact Meyer Sound to obtain the Low Driver Inspection and Evaluation Procedure for Self Powered Series Products part 17 010 120 01 Verifying Driver Polarity Incorrect driver polarity impairs system performance and may damage the drivers All Meyer loudspeakers are shipped with the drivers in correct alignment How ever if the driver or circuit wiring has been removed or disassembled in any loudspeaker in a system for any reason it is essential to check the polarity between drivers in the same cabinet and between adjacent loud speakers We do not recommend using phase poppers to analyze driver polarity The phase response for all drivers varies to some degree over the frequency range in which it operates Since the phase popper a popular but inaccurate tool does not discern variations in phase response with respect to frequency it provides no useful information about the phase response through the crossover the most important consideration for determining correct driver polarity Phase poppers are therefore not useful for performing phase measurements on an individual loudspeaker or a full range sound system containing one or more cross overs If necessary apply a phase popper only to loud speakers with identical drivers without a cros
18. igned vertical array steers low frequencies to include balconies and upper tiers while a horizontal array focuses low frequencies for long throw distances without interacting with the walls One of the most important factors governing LF response is speaker placement relative to adjacent surfaces The DS 2P gains significant LF power by coupling with nearby floors and walls Half space loading describes a speaker coupling with one surface Speakers placed on the floor benefit from half space loading while flown speakers in free space without a nearby wall or ceiling do not In general subwoofers in half space generate twice the SPL 6 dB compared to the same number in free space NOTE The trapezoidal shape of the DS 2P does not represent the horizontal coverage area of the speaker DS 2P Coverage and Maximum SPL A series of outdoor tests was conducted at Meyer Sound to determine the coverage angle and on axis SPL for arrays with one row with up to six speakers The mea surements were conducted ata distance of 8 m with half space loading on axis SPL values were interpolated from 8 m to 1 m The coverage angle for the array is the result of averaging the 6 dB points from 60 to 160 Hz Since the DS 2P s horizontal coverage angle is wide 140 splay angles larger than 15 are not often used The 15 angle is optimal since it combines substantial SPL addition with a narrowing of the horizontal coverage The 15 angle als
19. itoring System RMS interface network and software application RMS displays signal and power levels driver and cooling fan status limiter activity and amplifier temperature for all speakers in the network on a Windows based PC AC Power When AC power is applied to the DS 2P the Intelligent AC supply automatically selects the correct operating voltage allowing the DS 2P to be used in the US Europe or Japan without manually setting a voltage switch The Intelligent AC power supply also performs surge suppression for high voltage transients up to 275 V minimizes inrush current and filters EMI Continuous voltages above 275 VAC may damage the unit The DS 2P uses a NEMA L6 20P or IEC 309 male power inlet and satisfies UL CSA and EC safety standards Voltage Requirements The DS 2P operates safely and without audio discon tinuity if the AC voltage stays within the ranges 85 134 V or 165 264 V at 50 or 60 Hz Immediately after applying AC power the green Active LED on the user panel illuminates and the proper operating voltage is automatically selected but the system is muted During the next three seconds the primary fan turns on the main power supply slowly ramps on and the system is enabled to pass audio signals TROUBLESHOOTING NOTE If the Active LED does not illuminate or the system does not respond to audio input after ten seconds remove AC power to avoid possible damage to the unit Experienced electronics
20. li Meyer Sound Operating Instructions DS 2P Self Powered Mid bass Speaker Patents Pending Copyright 1997 Meyer Sound Laboratories Inc All rights reserved Part 05 035 005 01 Rev B Symbols Used These symbols indicate important safety or operating features in this booklet and on the chassis A A K Dangerous voltages risk of electric shock Important operating instructions Frame or chassis Protective earth ground Pour indiquer les risques r sultant de tensions Pour indequer important Masse chassis Terre de protection instructions dangereuses Zu wichtige betriebs anweisung und unter haltsanweisung zeigen Zu die gefahren von gefahrliche spanning zeigen pie schutzerdg Rahmen oder chassis Para indicar importante funcionar y mantenimiento instrucciones Para indicar azares provengo S A Tierra proteccionista de peligroso voltajes Armadura o chassis Declaration of Conformity According to ISO IEC Guide and EN 45014 The Manufacturer declares that the product Product Name DS 2P Name Meyer Sound Laboratories Product Options All Address 2832 San Pablo Avenue Berkeley California 94702 2204 USA conforms to the following Product Specifications EN 60065 1994 EN 55022 1987 Class A IEC 801 2 1984 8 kV IEC 801 3 1984 3 V m IEC 801 4 1984 0 5 kV Signal Lines 1 0 kV Power Lines Safe
21. mplifier channels equally TPL activity is indicated by the Sub Limit LED on the user panel The limiter ceases operation when the power level returns to normal and does not affect the signal when the LED is inactive The DS 2P performs within its acoustical specifications and operates at a normal temperature if the TPL LED is on for no longer than two seconds and off for at least one second If the LED remains on for longer than three seconds the DS 2P is hard limiting with these negative consequences e Increasing the input level will not increase the volume e The system distorts due to clipping and nonlinear driver operation e The life span of driver and amplifier components is reduced because they are subjected to excessive heat The TPL LED can indicate an imbalance in a system of speakers by functioning like a spectrum analyzer If speakers in a subwoofer mid bass or mid hi subsystem begin to limit before reaching the required operating level for the entire system then that subsystem needs to be supplemented with additional speakers NOTE Although the TPL limiters exhibit smooth sonic characteristics we do not recommend using them for intentional compression effects Use an outboard compressor limiter to compress a mixed signal Driver Excursion Clamp The drivers in the DS 2P are protected from over excursion by an excursion clamping circuit that does not have attack or release time constants The circuit provide
22. ng is 600 Ib based on a 5 1 safety factor with a straight tensile pull Notes 1 Acoustical specifications are for the minimum 3 Measured as the ratio between the peak SPL configuration of two DS 2P cabinets and are and the A weighted noise floor measured at 2m on axis from the 1 R image located at the rear of the cabinet 4 Nominal 8 Q resistive load pink noise 100 V peak 2 Subject to half space loading measured D with one third octave frequency resolution in The unit is rated at 88 125 V and 182 235 V fixed ISO bands 50 60 Hz to satisfy EC standards for 10 to 6 AC line voltage
23. o corresponds to tight packing DS 2Ps together along the edges of the enclosure making array construction particularly convenient especially for rigging clusters The following table shows the SPL and coverage areas for horizontal arrays with up to 6 DS 2Ps The splay angle refers to the angle between cabinet centers If this information does not address your application requirements contact Meyer Sound to obtain additional information on array design DS 2P Horizontal Array Coverage and Maximum SPL 12 Max Peak on Max Peak NETI Max Peak NETZ Max Peak are ae Max Peak ate ae Max Peak H dB SPL dB SPL dB SPL dB SPL dB SPL dB SPL 140 120 120 120 110 120 100 120 A Safety Summary A English To reduce the risk of electric shock disconnect the loud speaker from the AC mains before installing audio cable Reconnect the power cord only after making all signal connections Connect the loudspeaker to a two pole three wire ground ing mains receptacle The receptacle must be connected to a fuse or circuit breaker Connection to any other type of receptacle poses a shock hazard and may violate local electrical codes Do not install the loudspeaker in wet or humid locations without using weather protection equipment from Meyer Sound Do not allow water or any foreign object to get inside the loudspeaker Do not put objects containing liquid on or near the unit To reduce the risk of overheating the loudspe
24. our types of interchangeable rigging brackets each fastened by six Phillips screws e aircraft pan fittings ring and stud e 3 s 16 nut plates e M 10 x 1 5 metric nut plates e blank plates if no rigging brackets are requested NOTE Units with nut plates are rated for the weight of one cabinet only rigging brackets three on top three on bottom Handles are for carrying only Do not use them for rigging Rigging load ratings assume a straight tensile pull and that the cabinet is in new condition with aircraft pan fittings If these conditions are not met the load ratings can be reduced significantly Load ratings can also be reduced by age wear and damage It is important to inspect the rigging hardware regularly and replace worn or damaged components immediately The cabinet exposed electronic circuitry and drivers can receive protective treatment that permits safe use in wet conditions Additionally a rain hood can be fitted to shield cables and electronics Do not install a unit outdoors without weather protection Contact Meyer Sound for more information NOTE All Meyer Sound products must be used in accor dance with local state federal and industry regulations It is the owner s and or user s responsibility to evaluate the reliability of any rigging method for their application Rigging should be done only by experienced professionals Measurement and System Integration Tools It is essential that
25. raciones deben efectuarse nicamente por parte del personal de mantenimiento capacitado en la f brica 13 Specifications Acoustical Frequency Response 4 dB 50 160 Hz Phase Response 60 60 200 Hz Maximum SPL Music as source 140 peak Pink noise as source 136 dB continuous 140 peak check Dynamic Range gt 120 dB Coverage 120 H x 120 V Transducers Low Frequency Two 15 diameter MS 15 cone Audio Input Type 10 kQ impedance electronically balanced Connector XLR A 3 male and female Nominal Input Level 4 dBu 1 23 Vrms Amplifiers Type Complementary power MOSFET output stages class AB H Burst Capability 1240 Watts 620 Watts per channel THD IM TIM lt 02 AC Power Connector 250 V NEMA L6 20P IEC 309 Twistlock male receptacle Automatic voltage selection 85 134 V 165 264 V 50 Hz 60 Hz Max Continuous RMS Current gt 10s 115V 8A 230V 4A 100V 10A Max Burst RMS Current lt 1s 115V 15A 230V 8A 100V 18A Max Peak Current During Burst 115 V 22 Apk 230 V 11 Apk 100 V 25 Apk Soft Current Turn on Inrush current lt 12A 115V Physical Dimensions 21 25 W x 56 75 H x 30 D Weight 221 Ib 100 kg shipping 267 Ib 121 kg Enclosure Finish Multi ply hardwood black textured Protective Grill Perforated steel grill grey foam Rigging Six aircraft pan fittings three on top and bottom Working load for each fitti
26. rleur contient des circuits haute tension pr sentant un danger Ne jamais essayer de le d monter Il n y a aucun composant qui puisse tre r par par l utilisateur Toutes les r parations doivent tre effectu es par du personnel qualifi et agr par le constructeur Deutsch Um die Gefahr eines elektrischen Schlages auf ein Minimum zu reduzieren den Lautsprecher vom Stromnetz trennen bevor ggf ein Audio Schnittstellensignalkabel angeschlossen wird Das Netzkabel erst nach Herstellung aller Signalverbindungen wieder einstecken Der Lautsprecher aneine geerdete zweipolige Dreiphasen Netzsteckdose anschliefsen Die Steckdose mufs mit einem geeigneten Abzweigschutz Sicherung oder Leistungsschalter verbunden sein Der Anschlu der unterbrechungsfreien Stromversorgung an einen anderen Steckdosentyp kann zu Stromschl gen f hren und gegen die rtlichen Vorschriften versto en Der Lautsprecher nicht an einem Ort aufstellen an dem sie mit Wasser oder berm ig hoher Luftfeuchtigkeit in Ber hrung kommen k nnte Darauf achten daf weder Wasser noch Fremdk rper in das Innere den Lautsprecher eindringen Keine Objekte die Fl ssigkeit enthalten auf oder neben die unterbrechungsfreie Stromversorgung stellen Um ein berhitzen dem Lautsprecher zu verhindern das Ger t vor direkter Sonneneinstrahlung fernhalten und nicht in der N he von w rmeabstrahlenden Haushaltsger ten z B Heizger t oder Herd aufstellen
27. s instantaneous braking for the drivers without the pumping effects commonly produced by compressor limiters The circuit uses sophisticated filters to minimize the distortion normally caused by clamping and clipping As the DS 2P s input signal is increased past the clamp ing point the output signal remains at a fixed level protecting the drivers and minimizing negative sonic effects The DS 2P operates safely if the Exc Clamp LED is on for no longer than two seconds and off for at least one second Fans and Cooling System The DS 2P uses a forced air cooling system with two fans to prevent the amplifiers from overheating The fans draw air in through ducts on the front of the cabinet over the heatsinks and out the rear of the cabinet Since dust does not accumulate in the amplifier circuitry its life span is increased significantly A foam insert filter in combination with the entire front grill surface acts as an air filter for the cooling system Despite the filtering extensive use or a dusty operating environment can allow dust to accumulate along the path of the airflow preventing normal cooling We recommend periodically removing the grill filter and amplifier module and using compressed air to clear dust from the grill filter fans and heatsinks Make sure that the air ducts are clear and that there is at least six inches clearance for exhaust behind the cabinet F R o R N E T A R air intake Power
28. sover and check the system s overall phase response with a frequency analyzer and or listening test NOTE Since polarity reversal causes excessive driver excursion at high source levels use moderate levels for these tests Driver Polarity in the Same Loudspeaker Use the following test procedure to verify polarity between drivers in the same loudspeaker 1 Place a measurement microphone 3 ft from the front of the loudspeaker at the midway point between the two drivers 2 Connect a signal source to the loudspeaker and note the frequency response Top driver is 180 out of phase SEAN TN Drivers with correct Drivers with reverse polarity cause acoustic polarity cause acoustic addition cancellation The polarity is correct if the frequency response is 4 dB 50 160 Hz Cancellation greater than 6 dB in the same range indicates polarity reversal Polarity Between Adjacent Loudspeakers Use the following test procedure to verify the polarity between adjacent loudspeakers of the same type 1 Position two loudspeakers adjacent to each other 2 Place a measurement microphone 3 ft from the speakers on the axis between them 3 Connecta signal source to one speaker and note the frequency response and overall level 4 Apply the same signal to the second speaker with the first speaker still connected The polarity is correct if the frequency response remains constant with a significant increase in amplitude Broad
29. ty EMC Environmental Specifications for Meyer Sound Electronics Products 0 C to 45 C lt 40 C or gt 75 C to 95 at 35 C to 4600 m 15 000 ft to 6300 m 25 000 ft Operating temperature Nonoperating temp Humidity The product herewith complies with the require Operating altitude ments of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC Nonoperating altitude Shock 30 g 11 msec half sine Office of Quality Manager on each of 6 sides Berkeley California USA Vibration 10 55 Hz 0 010 m October 1 1995 peak to peak excursion U Useren U gLj 3x59 cle Made by Meyer Sound Berkeley CA USA European Office Meyer Sound Germany GmbH Carl Zeiss Strasse 13 56751 Polch Germany COMMERCIAL AUDIO SYSTEM Contact Information Meyer Sound Laboratories Inc 2832 San Pablo Avenue Berkeley California 94702 Telephone 510 486 1166 FAX 510 486 8356 E mail techsupport meyersound com http www meyersound com Meyer Sound Germany Gmbh Carl Zeiss Strasse 13 56751 Polch Germany Telephone 49 2654 9600 58 FAX 49 2654 9600 59 Contents Controls and Connectors ssssssssssssssenneseeenneseene E Measurement and System Integration Tools 8 DIMENSIONS EEN 3 Complete Systems ssssssssssensssssrrneserrennrtenneeertn nennen 9 Introduction ossei ea 4 Driver Troubleshooting 0
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