Meyer Sound MSL-4

Measurement and System

Integration Tools

It is essential that even the most carefully assembled sound

systems be analyzed with precise measurement tools. We rec-

ommend using the Meyer SIM® System II Sound Analyzer

and CP-10 Parametric Equalizer to

• assist the process of conﬁguring speaker systems;

• 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 Sound LD-1A Line Driver

to integrate different types of Meyer self-powered loudspeakers

into a complete system. The LD-1A has two channels equipped

to control a full-range main system, and six auxiliary chan-

nels 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 (160Hz,

–12 dB/oct, Q = 0.8) that performs a crossover function

for the Mid-Hi output.

• The DS-2/DS-4 & Sub Crossover switch (channels 1

and 2 only) activates a crossover network optimized for

the DS-2P and DS-4P when used with the 650-P. With

the switch in, frequencies below 80Hz are sent to the

Sub output (for the 650-P), and above 80Hz to the DS-2

output. When the 650-P is used without the DS-4P, the

switch should be out, which sends a full-range signal

to both the DS-2 and Sub outputs.

• The DS-2/DS-4 and Sub 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 loud-

speaker systems may be reversed using the input polarity switch

on the user panel. The LD-1A also allows polarity reversal with

the DS-2 f and Sub f switches for loudspeakers 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.

Contact Meyer Sound for assistance with your application.

Complete Systems

Meyer Sound loudspeaker systems are designed to complement

one another, with the goal of ensuring full harmonic depth and

richness to the audial experience.

The following Meyer Sound loudspeaker systems are mentioned

in the example applications. Note that each application requires

the use of the LD-1A line driver.

CQ: Self-powered loudspeaker

DS-2P, DS-4P: Self-powered mid-bass loudspeakers

650-P: Self-powered subwoofer

PSW-2, PSW-4: Self-powered subwoofers

650-R2: Externally ampliﬁed subwoofer

The Meyer Sound self-powered loudspeaker systems listed

above have a loop connection to send the input signal to another

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

Sound self-powered subwoofers because they have built-in

active crossovers that ﬁlter mid-hi frequencies.

The cabinets in the following examples are in a close-proximity

coplanar orientation, unless otherwise stated. Externally ampliﬁed

Meyer subwoofers require the opposite polarity to all Meyer self-

powered speakers. Separating speakers by more than 5 ft may

require polarity reversal to compensate for the propagation

delay between the loudspeakers and the measurement or lis-

tening position.

MSL-4 and 650-P

The MSL-4 is particularly well matched with the 650-P and

PSW-2 and also performs efﬁciently with the PSW-4. Due

to the overlap in frequency response between the MSL-4 and

the subwoofer, the system frequency response exhibits a low

frequency (LF) rise in the range 65–120Hz. It is important to

emphasize that the loudspeakers are in phase in this region.

The rise can be corrected using the Meyer Sound CP-10

Parametric Equalizer, if desired.

MSL-4

loop

input

CP-10 EQ

(1 Channel)

650-P

Set the MSL-4 and 650-P to the same polarity.