Meyer Sound MSL-4 manuale d’uso

Operating I nstruc tions MSL-4 Self-Powered Loudspeaker System Copyright © 1999 Meyer Sound Laboratories, Inc. All rights reserved. Part # 05.031.008.01 Rev C Keep these important operating instructions. T op Front Side[...]

2 English F rançais Deutsch Español Safety Summar y • T o reduce the risk of electric shock, disconnect the loud- speaker from the AC mains bef ore installing audio cable. Reconnect the pow er cord only af ter mak ing all signal connections. • Connect the loudspeaker to a two-pole , three wire grou nd- ing mains receptacle. The receptacle mus[...]

3 Contents Safety Summary ................................................................... 2 Introduction ................................................................... 4 AC Power ..................................................................... 4 Audio Input .................................................................. 6 Amplific[...]

4 Introduction The MSL -4 se lf-p ower ed louds peake r syste m is idea l for lar ge venues requiring long throw distances and precise coverage, but can a lso be used ef fecti vely i n smal ler ap plica tions . Its high- Q (narrow coverage) horn has a consistent beam width across its entire frequency range, enabling efficient array design that max[...]

5 grounding adapter when connecting to ungrounded out- lets. Do not use a ground-lifting adapter or cut the AC cable ground pin. Keep all liquids away from the MSL-4 to avoid hazards from electrical shock. Do not operate the unit if the power cables are frayed or broken. T ie-wrap anchors on the amplifier chassis provide strain relief for the powe[...]

6 P ow er C o nn ec to r W ir in g Use the following AC cable wiring diagram to create interna- tional or special-purpose power connectors: brown = hot blue = neutral yellow/green = earth ground (chassis) AC cable color code If th e col ors refe rred to in the diag ram don't cor respo nd t o the terminals in your plug, use the following guidel[...]

7 longer t han two seconds , and off for at least one second. If either LED remains on for longer than three seconds, that channel is hard limiting with these negative consequences: • Increasing the input level will not increase the vol- ume. • The system distorts due to clipping and nonlinear driver operation. • Unequal limiting between the [...]

8 Rigging T wo types of rigging hardware are available to fly the MSL- 4 loudspeaker system: Aircraft pan fittings and the optional L-T rack system. Both are installed and tested exclusively at Meyer Sound Laboratories. Aircraft Pan Fittings Only The MSL -4 without L-T rack weighs 184 lb (83.5 kg). The maximum recommended load for an MSL-4 with a[...]

9 The MSL-4 equipped with the L-T rack rigging system weighs 205 lbs (93 kg). The maximum recommended load for an L-T rack-equipped MSL-4 at vertical pull using any 2 points is 1500 lbs. (682 kg) .W e strongly recommed using all four rigging points per end. This working load is based on a 5:1 safety factor 1 . L-T rack provides eight rigging points[...]

10 Measurement and System Integration T ools It is essential that even the most carefully assembled sound systems be analyzed with precise measurement tools. W e rec- ommend using the Meyer SIM® System II Sound Analyzer and CP-10 Parametric Equalizer to • assist the process of configuring speaker syste ms; • measure propagation delays between[...]

11 LD-1A with MSL-4 and 650-P A typic al MSL-4:650-P ratio is 2:1 but separate Sub and Mid- Hi level controls on the LD-1A allow the ratio to vary while mai ntain ing contr ol of the spec tral balan ce of the syst em. The Lo Cut filter for CH1 Mid-Hi should be in to correct the LF rise between the MSL-4 and 650-P. MSL-4 650-P CH 1 Sub CH1 Input CH[...]

12 Driver T roubleshooting T roubleshooting with TPL The T PL LE D ca n in dica te s erio us d rive r pr oble ms, if i nter pret ed correctly . If one MSL-4 in a system exhibits substantially more TPL activity than others receiving the same audio signal, then one or both drivers in that unit may hav e a sh ort c ircu it. T his is a po tent iall y d[...]

13 Pha se poppe rs are, the refor e, not usef ul for perf ormin g phase measurements on an individual loudspeaker or a full-range sound system containing one or more crossovers. If necessary , apply a phase popper on ly to loud speakers with iden tical driv ers without a crossover , and c he c k t he sy s te m ’s ov e ra l l p ha s e r es p on s [...]

14 Array Design Creating an effective array with the MSL-4 requires a precise understanding of how to combine the coverage area and SPL of the individual speaker with those of adjacent speakers. Array design is a trade-off between in cr eas in g on -a xis pow er an d cr eat in g s mo oth t ra nsi ti ons between the coverage areas of adjacent speake[...]

15 Complementary power MOSFET output stages class AB/H 1240 W atts (620 W atts/channel) < .02 % Acoustical Frequency Response 1 ±4dB 65Hz-18kHz:-6dB at 60Hz and 20kHz ±30° 450Hz-10kHz 140dB > 1 10dB 40° H x 35° V Specifications Phase Response 1 Maximum Peak SPL 1 Dynamic Range 2 Coverage T ransducers Low Frequency High Frequency Acousti[...]

16 ATENCIÓN : ACCESO INTERNO SOLO  AUTORIZADO A PERSONAL TÉCNICO C  ACHTUNG : GEHÄUSE NICHT ÖF UND REPARATUR NUR DURCH EE  ATTENTION : ENTRETIEN ET RS  INTERNES NE SONT AUTORIU  PERSONNEL TECHNIQUE QUALIFIÉ  UK WARNING : THIS APPARARTHED.  NO OPERATOR SERVICEABLE PAE.  REFER SERVICING TO QUALIFIEDNEL WARNING[...]

17 Dimensions Front Side T op (in inches) 36.00" 5.50" 16.50" 30.00" 17.50" 13.36" 21.97" 10.63" 13.16" 21.25" 7.5 ° 30.26" Contact Information Meyer Sound Laboratories, Inc. 2832 San Pablo A venue Berkeley , California 94702 T elephone: 510 - 486 - 1 166 F AX: 510 - 486 - 8356 E-mail: techsup[...]