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MTS-4A Self-Powered Loudspeaker Systems
OPERATING INSTRUCTIONS
Superior
engineering
for the art
and science
of sound.
Keep these important operating instructions
Check www.meyersound.com for updates
OPERATING INSTRUCTIONS
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CONTENTS Safety Summary 3 The MTS-4A: Introduction 4 AC Power 4 Audio Input 6 Amplification and Protection Circuitry
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! SAFETY SUMMARY ENGLISH pénétrer dans appareil. Ne pas placer nicht in der Nähe von To reduce the risk of electric shock, de r´cipients contenant un liquide sur wärmeabstrahlenden Haushaltsgeräten disconnect the unit from the AC cet appareil, ni à proximité de celui- (z.B. Heizgerät oder Herd) aufstellen. mains before installing audio cable. ci. Im Inneren diesem Gerät herr-schen Reconnect the power cord only after Pour éviter une surchauffe de potentiell gefährliche Spannungen
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THE MTS-4A: INTRODUCTION The Meyer MTS-4A self-powered loudspeaker is a compact, enclosure. This integrated design improves performance, self-contained, full-range system suited for clubs and small durability, and reliability, eliminates amplifier racks, and theatres (throw distances less than 100 ft). Its trapezoidal simplifies setup and installation. The MTS-4A has the shape facilitates array design that maximizes coverage and following acoustical specifications: SPL for the size of the a
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circuit breakers heat up (and trip) at varying rates, it is If the colors referred to in the diagram don't correspond to the essential to understand the types of current ratings and how terminals in your plug, use the following guidelines: they correspond to circuit breaker and cable specifications. Connect the blue wire to the terminal marked with an N or colored black. The maximum continuous RMS current is the maximum RMS Connect the brown wire to the terminal marked with an L curre
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AUDIO INPUT with XLR connectors for balanced signal sources. The MTS-4A presents a 10 kΩ balanced input impedance to a three-pin XLR connector wired with the following convention: NOTE: If abnormal noise (hum, hiss, popping) is produced from Pin 1 220 kΩ to chassis and earth ground (ESD clamped) the loudspeaker, disconnect the audio source from the speaker. If the noise stops, then the problem is not Pin 2 Signal Pin 3 Signal within the loudspeaker; check the audio input and AC power. Cas
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compressed air to clear dust from the grill, filter, fans, and at close proximity without an audio signal and turn on in heatsinks. Make sure that the air ducts are clear and that response to there is at least six inches clearance for exhaust behind the cabinet. primary fan failure (check its status immediately); accumulation of dust in the cooling system path; Two variable-speed primary fans run continuously with an a prolonged period of high source levels in hot inaudible operatin
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MEASUREMENT AND SYSTEM INTEGRATION TOOLS It is essential that even the most carefully assembled sound dB/oct, Q = 0.8) that performs a crossover function for the systems be analyzed with precise measurement tools. We Mid-Hi output. recommend using the Meyer Sound SIM® System II Sound The DS-2 & Sub Crossover switch (channels 1 and 2 only) 1 2 Analyzer and CP-10 Parametric Equalizer to activates a crossover network optimized for the DS-2P or DS-4P when used with the 650-P. With the switch i
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The CH 1 Mid-Hi and CH 3 outputs drive the upper and lower LD-1A WITH FLOWN MTS-4A AND CQ; 650-P ON THE MTS-4A arrays, respectively, applying appropriate levels for FLOOR speakers directed at different distances. CH 3 is delayed to This example shows the LD-1A integrating a complete system phase align the upper and lower systems in the intersecting of self-powered speakers for a large venue. Although channels coverage area. 1, 3, and 5 constitute half of the system, channels 2, 4, and
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We do not recommend using phase poppers to analyze driver The polarity is correct if the frequency response is smooth polarity. The phase response for all drivers varies, to some through each crossover region (40 Hz, 100 Hz, 1 kHz). degree, over the frequency range in which it operates. Since Cancellation greater than 6 dB in any region indicates polarity the phase popper, a popular but inaccurate tool, does not reversal between the drivers on either side of that crossover discern variations
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(without a nearby wall or ceiling) do not. In general, ARRAY DESIGN FOR LOW FREQUENCIES subwoofers in half-space generate twice the SPL (+6 dB) Since the MTS-4A contains sub and low frequency drivers, in compared to the same number in free-space. addition to mid and high drivers, array design for the MTS-4A must incorporate the different array response of high and low NOTE: SPL values refer to an on-axis measurement position. frequencies. The beam width for a single speaker widens as Th
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MT S-4A SPECIFICA TIONS 2 1 Acoustical Operating Frequency Range 26 Hz - 18 kHz ± 6 dB (each loudspeaker) Free Field 32 Hz - 16 kHz ± 4 dB Half-Space 30 Hz - 16 kHz ± 4dB Phase Response ± 70° 90 Hz - 17.2 kHz 3 Maximum Peak SPL 140 dB Signal to Noise Ratio >100 dB (A weighted noisefloor to max SPL) Coverage -6 dB at 70° H x 60° V Transducers Sub Frequency 18-inch cone driver Low Frequency 15-inch cone driver Mid Frequency 12-inch cone driver High Frequency 2-inch throat (4-inch diaphragm) co
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MTS-4A DIMENSIONS All units in inches 10.63 21.97 13.00 21.26 13.36 13.16 30.26 Bottom 7.5 Top 30.00 14.125 56.75 28.5 Front Side REAR PANEL DETAIL MTS-4A 13
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CONTACT INFORMATION Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, CA 94702 tel: 510.486.1166 fax: 510.486.8356 05.029.006.02 Rev A e-mail: info@meyersound.com www.meyersound.com Check www.meyersound.com for updates 14
