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7

Fans and Cooling System

The MSL-6 uses a forced-air cooling system with four
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.

The front grill surface acts as an air filter for the cooling
system and should always be in place during operation.
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 and amplifier
module and using a vacuum cleaner to clear dust from
the grill, 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.

amplifier

heatsinks

fans

air 
intake

Two variable-speed primary fans run continuously with
an inaudible operating noise of 22 dBA at 1 m at their
slowest speed. The primary fans begin increasing speed
when either of the two heatsinks reaches 42

°

C. The fans

reach full speed at 62

°

C and are barely audible near the

cabinet, even without an audio signal.

In the unusual event that the heatsink temperature
reaches 74

°

C, the secondary fans turn on and are clearly

audible. The secondary fans turn on in response to

• primary fan failure (check status immediately);

• high source levels for a prolonged period in hot

temperatures or direct sunlight;

• accumulation of dust along the cooling path;

• driver failure.

The secondary fans turn off when the temperature
decreases to 68

°

C.

TROUBLESHOOTING NOTE: 

In the highly unlikely event

that the secondary fans do not keep the temperature
below 85

°

C, the MSL-6 automatically shuts down until

AC power is removed and reapplied. If the MSL-6 shuts
down again after cooling and reapplying AC power,
contact Meyer Sound for repair information.

Rigging

A single MSL-6 weighs 510 lb (282 kg) and has twelve
pivoting lift rings (six on top, six on bottom), each with
a maximum working load capacity of 1500 lb (5:1
safety factor). The rigging hardware is depicted on page
12 in the 

Dimensions 

section.

Rigging load ratings assume a straight tensile pull and
that the cabinet is in new condition. 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

accordance with local, state, federal, and industry regu-
lations. 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.

Содержание MSL-6

Страница 1: ...Operating Instructions MSL 6 Copyright 1997 Meyer Sound Laboratories Inc All rights reserved Part 05 053 026 01 Rev A Self Powered Loudspeaker System...

Страница 2: ...C Nonoperating temp 40 C or 75 C Humidity to 95 at 35 C Operating altitude to 4600 m 15 000 ft Nonoperating altitude to 6300 m 25 000 ft Environmental Specifications for Meyer Sound Electronics Produ...

Страница 3: ...ower is applied to the MSL 6 the Intelligent AC supply automatically selects the correct operating voltage allowing the MSL 6 to be used internationally withoutmanuallysettingvoltageswitches TheIntell...

Страница 4: ...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...

Страница 5: ...nd chassis 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 relati...

Страница 6: ...igh limiter engages limiting the center as well as the outer two horns The high and low limiters function independently and do not affect the signal when the LEDs are inactive The MSL 6 performs withi...

Страница 7: ...rolonged period in hot temperatures or direct sunlight accumulation of dust along the cooling path driver failure The secondary fans turn off when the temperature decreases to 68 C TROUBLESHOOTING NOT...

Страница 8: ...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...

Страница 9: ...or The system from the previous example can be supple mented with a row of four DS 2Ps or PSW 2s sus pended below the lower MSL 6 array to reinforce the low frequencies The MSL 4s are hung below the D...

Страница 10: ...s that secure the high driver to the horn Hold the driver as the final nut is removed to prevent it from falling Twist the driver sideways and up down to remove it from the back of the cabinet Use a 3...

Страница 11: ...e 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...

Страница 12: ...pport Channel 11 Ga Steel Side Braces Resonance Damping Foam Bracing Fastened With 3 8 16 Grade B Steel Flathead Socket Screws 32 Total Pivoting Lift Ring 1500 lb Load Capacity 5 1 Safety Factor 12 pl...

Страница 13: ...en nur von ausgebildetem Kundenienstpersonal durchgef hrt werden Para reducir el riesgo de descarga el ctrica desconecte de la red el altoparlante antes de instalar el cable de se alizaci ndeinterfazd...

Страница 14: ...the optional Remote Monitoring System RMS panel ATENCI N ACCESO INTERNO SOLO AUTORIZADO A PERSONAL T CNICO CALIFICADO ACHTUNG GEH USE NICHT FFNEN WARTUNG UND REPARATUR NUR DURCH ELEKTROFACHKR FTE ATTE...

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