Operating Instructions 650-P Self-Powered Subwoofer Patents Pending Copyright © 1997, Meyer Sound Laboratories, Inc. All rights reserved Part #: 05.036.007.
Contents Introduction ......................................................... 3 AC Power ............................................................ 3 Audio Input .......................................................... 5 Amplification and Protection Circuitry .................. 5 Configuration, Placement, and Polarity ...............7 Measurement and System Integration Tools ......8 Full-Range Systems ..........................................8 Driver Troubleshooting .................................
Voltage Requirements Introduction The 650-P, Meyer Sound’s most powerful self-powered subwoofer, contains independent amplifier and control electronics for two 18” drivers in a compact enclosure. This integrated design improves performance, durability, and reliability, eliminates amplifier racks, and simplifies setup and installation.
Current Requirements Safety Issues The 650-P 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. Pay close attention to these important electrical and safety issues.
Power Connector Wiring Conventions Use the following AC cable wiring diagram to create international or special-purpose power connectors: brown = hot blue = 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: • Connect the blue wire to the terminal marked with an N or colored black. • Connect the brown wire to the terminal marked with an L or colored red.
When the safe continuous power level is exceeded, a single limiter engages, affecting both amplifier 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 650-P 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.
Configuration, Placement, and Polarity Designing a full-range system requires an understanding of how subwoofers respond when grouped together, how they interact with nearby walls and floors, and how their location in a system affects the choice of polarity to use for other speakers. These topics are introduced as background for the section Full-Range Systems. Configuration A single subwoofer has an essentially omnidirectional coverage pattern.
Measurement and System Integration Tools Full-Range Systems Meyer Speaker Types It is essential that even the most carefully assembled sound systems be analyzed with precise measurement tools.
LD-1A with 650-P and MSL-4 LD-1A with MSL-4, DS-2P, and 650-P Using the LD-1A’s Lo Cut filter for the CH 1 Mid-Hi output also eliminates the low frequency rise caused by the frequency response overlap between the MSL-4 and 650-P. Although a typical MSL-4:650-P ratio is 2:1, CH 1’s Sub and Mid-Hi level controls allow this ratio to vary while maintaining control of the spectral balance of the system. The DS-2 & Sub Crossover switch should be out.
Driver Troubleshooting Troubleshooting with TPL The TPL LED can indicate serious driver problems, if interpreted correctly. If one 650-P 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 650-P down immediately.
Safety Summary English Français • To reduce the risk of electric shock, disconnect the loudspeaker from the AC mains before installing audio cable. Reconnect the power cord only after making all signal connections. • Pour réduire le risque d’électrocution, débrancher la prise principale de l’haut-parleur, avant d’installer le câble d’interface allant à l’audio. Ne rebrancher le bloc d’alimentation qu’après avoir effectué toutes les connections.
Specifications Acoustical 1 Frequency Response Phase Response Maximum SPL Music as source Pink noise as source Dynamic Range2 ±4 dB 28 100Hz ±30° 45 145Hz 136 dB peak 120 dB continuous; 130 dB peak > 110 dB Transducers Sub Frequency Two 18" diameter MS-18 cone drivers Audio Input Type Connector Nominal Input Level 10kOhm impedance, electronically balanced XLR (A-3) male and female +4 dBu (1.
Controls and Connectors Rear User Panel shown with the optional Remote Monitoring System (RMS) panel European User Panel with IEC 309 connector 13
Dimensions All units in inches Top Front 14 Side
Notes 15
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 16 Meyer Sound Germany GmbH Carl Zeiss Strasse 13 56751 Polch, Germany Telephone: 49.2654.9600.58 FAX: 49.2654.9600.59 E-mail: meyersound@t-online.
