Meyer Sound MSL-6 Operations Instructions download pdf (Page 8)

Measurement and System

Integration

Measurement and correction tools are required to

assemble a complete sound system, particularly when

the venue requires precise array design, delay systems,

or compensation for significant reverberation. We

recommend using the Meyer SIM® System II Sound

Analyzer and CP-10 Parametric Equalizer to

• assist the process of choosing and configuring

speakers;

• measure propagation delays between subsystems

to set the correct polarity and delay times;

• measure and equalize variations in frequency

response caused by the acoustical environment

and the placement and interaction of speakers.

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 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:

• 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.

• The Array EQ switch activates a filter (6 dB cut

at 220 Hz, 0.6 octave bandwidth) to equalize

horizontal arrays of 3 to 5 MSL-4s.

• The DS-2 & Sub Crossover switch (channels 1 and

2 only) activates a crossover network optimized

for the DS-2P when used with the 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 650-P is used without the

DS-2P, the switch should be out, which sends a

full-range signal to both the DS-2 and Sub outputs.

• The DS-2 φ and Sub φ switches (channels 1 and 2

only) toggle the polarity for the DS-2 and Sub

outputs.

• 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 φ

and

Sub φ

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

Meyer Speaker Types

The following Meyer speakers are mentioned in the

example applications.

MSL-4 Self-powered mid-hi speaker

DS-2P Self-powered mid-bass speaker

PSW-2 Self-powered subwoofer

650-P Self-powered subwoofer

The Meyer self-powered speakers listed above have a

loop connection to send the input signal to another

speaker. Full-range signals can be applied to all Meyer

self-powered subwoofers because they have built-in

active crossovers that filter mid-hi frequencies.

Flown MSL-6 and MSL-4;

650-P on the Floor

This example shows a large concert system controlled by

the LD-1A consisting of two rows of two MSL-6s (lower

row at 10° to the top row), one row of two MSL-4s with

a 30° horizontal splay angle (hung below lower MSL-6 at

20°), and 650-Ps on the floor. The diagram on the next

page displays connections for half of a complete system;

channels 2, 4, and 6 can be used with identical connections

to create the other half.

The CH 1 Mid-Hi and CH 3 outputs drive the upper and

lower MSL-6 arrays, respectively. Since the coverage

areas of the upper and lower MSL-6 arrays intersect to

some degree, CH 3 is delayed to phase align the upper

and lower systems. The Lo Cut switches for the CH 1

Mid-Hi and CH 3 outputs should be in. The number of

MSL-6s for each row depends on the horizontal coverage

required by the system; each tight-packed unit adds

30°. Refer to the MSL-4 and 650-P Operating Instructions

to design arrays for those speakers.

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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Meyer Sound MSL-6 Operations Instructions Page 8

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