Controls and connectors, River, Olarity in the – Meyer Sound DS-4P User Manual

Page 10: Oudspeaker, Olarity, Etween, Djacent, Oudspeakers

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background image

D

RIVER

P

OLARITY IN THE

S

AME

L

OUDSPEAKER

Use the following test procedure to
verify polarity between drivers in the
same loudspeaker:

1. Place a measurement microphone 3 ft

from the front of the loudspeaker at
the midway point between the two
drivers.

2. Connect a signal source to the loud-

speaker and note the frequency
response.

The polarity is correct if the frequency
response is ±4dB 50–160 Hz. Can-
cellation greater than 6 dB in the same
range indicates polarity reversal.

P

OLARITY

B

ETWEEN

A

DJACENT

L

OUDSPEAKERS

Use the following test procedure to
verify the polarity between adjacent
loudspeakers of the same type:

1. Position two loudspeakers adjacent to

each other.

2. Place a measurement microphone 3 ft

from the speakers on the axis
between them.

3. Connect a signal source to one loud-

speaker and note the frequency
response and overall level.

4. Apply the same signal to the second

loudspeaker with the first loudspeaker
still connected.

The polarity is correct if the frequency
response remains constant with a
significant increase in amplitude.
Broadband cancellation (decreased
overall level) indicates polarity reversal.

NOTE: Do not attempt to check more

than two adjacent loudspeakers in
one test. Detecting polarity reversal
among more than two loudspeakers is
difficult and may damage the drivers
in the cabinet with reversed polarity.

10

CONTROLS AND CONNECTORS

U

ULL

C

C

U

ULL

®

®

LISTED

3K59

COMMERCIAL

AUDIO SYSTEM

ATENCIÓN:

ACCESO INTERNO S

A PERSONAL TÉCNICO CALIFICADO

ACHTUNG:

GEHÄUSE NICH

WARTUNG UND REPARATUR
ELEKTROFACHKRÄFTE

ATTENTION:

ENTRETIEN E

INTERNES NE SONT AUTORISEES
TECHNIQUE QUALIFIÉ

UK WARNING:

THIS APPARAT

NO OPERATOR SERVICEABLE PARTS
SERVICING TO QUALIFIED PERSONNEL

WARNINGS:

This surface may reach high temperat

To ensure proper operation, allow a

clearance from this surface and adeq

To reduce the risk of electric shoc

No operator serviceable parts insid

qualified personnel.

To reduce the risk of fire or electric

this appliance to rain or moisture.

PU

SH

R

E

- C I R K

-I

T

Pin 1 Earth / Chassis
Case Earth / Chassis

Input

Loop

Pin
2 +

3 +

!

1

1

2

3

1

3

2

8A RMS
20A Peak
95-125

~

50-60Hz
700W RMS MAX

Meyer Sound,

Auto-Voltage Select

Input Polarity

THIS PRODUCT MUST BE GROUNDED

PU

SH

R

E

- C I R K

-I

T

PUSH

Made by:Meyer Sound,Berkeley,Ca. U.S.A.
European Office:

Meyer Sound Europe
14, Long Barn Lane,
Reading, Berkshire,
England RG2 7SZ

European User Panel with IEC 309 connector

Rear User Panel shown with the optional Remote Monitoring System (RMS) panel

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