Operating Instructions
PSW-2
Self-Powered Subwoofer
Patents Pending
Copyright © 1997, Meyer Sound Laboratories, Inc.
All rights reserved
Part #: 05.047.033.01 Rev A
Contents
Introduction .......................................................... 3
AC Power .............................................................. 3
Audio Input ........................................................... 5
Amplification and Protection Circuitry ............... 5
Rigging .................................................................. 7
Configuration, Placement, and Polarity.............. 7
Measurement and System Integration Tools ....... 8
Full-Range Systems ................................................ 8
Driver Troubleshooting.........................................10
Safety Summary....................................................11
Controls and Connectors ......................................12
Dimensions ............................................................12
Symbols Used
These symbols indicate important safety or operating features in this booklet and on the chassis.
!
Dangerous voltages:
risk of electric shock
Pour indiquer les risques
résultant de tensions
dangereuses
Zu die gefahren von
gefährliche spanning zeigen
Para indicar azares provengo
de peligroso voltajes
Important operating
instructions
Pour indequer important
instructions
Zu wichtige betriebs-
anweisung und unter-
haltsanweisung zeigen
Para indicar importante
funcionar y mantenimiento
instrucciones
Declaration of Conformity
According to ISO/IEC Guide and EN 45014
Name: Meyer Sound Laboratories
Address: 2832 San Pablo Avenue
Berkeley, California 94702-2204, USA
conforms to the following Product Specifications:
Frame or chassis
Masse, châssis
Rahmen oder chassis
Armadura o chassis Tierra proteccionista
Protective earth ground
Terre de protection
Die schutzerde
declares that the product:The Manufacturer:
Product Name: PSW-2
Product Options: All
Safety: EN 60065: 1994
EMC: EN 55022: 1987 - Class A
IEC 801-2: 1984 - 8 kV
IEC 801-3: 1984 - 3 V/m
IEC 801-4: 1984 - 0.5 kV Signal Lines,
1.0 kV Power Lines
The product herewith complies with the requirements
of the Low Voltage Directive 73/23/EEC and the
EMC Directive 89/336/EEC.
Office of Quality Manager
Berkeley, California USA
October 1, 1995
Made by Meyer Sound, Berkeley, CA, USA
European Office:
Meyer Sound Germany
GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany
2
Environmental Specifications for
Meyer Sound Electronics Products
Operating temperature:0° C to +45° 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)
Shock: 30 g 11 msec half-sine
on each of 6 sides
Vibration: 10 – 55 Hz (0.010 m
peak-to-peak excursion)
LISTED
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®®
3K59
COMMERCIAL
AUDIO SYSTEM
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Introduction
The Meyer PSW-2 self-powered subwoofer contains
independent amplifier and control electronics for two
15” drivers in a compact enclosure. The PSW-2 has the
following acoustical specifications:
Frequency Response ±4 dB 35 – 120 Hz
Dynamic Range > 110 dB
Phase Response ±30° 50 – 145 Hz
The PSW-2 is identical in size to, and matches well with
the Meyer MSL-4. The PSW-2 also operates efficiently
with the Meyer MTS-4 or CQ™ Series self-powered
speakers, and can be used in any system requiring
additional low frequency power.
The PSW-2 can withstand continuous voltages up to
275 V and allows any combination of voltage to GND
(i.e. Neutral-Hot-GND, Hot-Hot-GND). Continuous
voltages higher than 275 V may damage the unit.
The PSW-2 uses a NEMA L6-20P or IEC 309 male power
inlet and satisfies UL, CSA, and EC safety standards.
Voltage Requirements
The PSW-2 operates safely and without audio discontinuity if the AC voltage stays within either of two operating
windows: 85–134 V or 165–264 V, at 50 or 60 Hz. After
applying AC power, the proper operating voltage is
automatically selected, but the system is muted. During
the next three seconds, the primary fan turns on, the
main power supply slowly ramps on, the green Active
LED on the user panel illuminates, and the system is
enabled to pass audio signals.
The PSW-2’s integrated design impr oves durability and
reliability , eliminates amplifier racks, and simplifies setup
and installation. The trapezoidal shape facilitates the
creation of speaker arrays that maximize the coverage
area for the size of the array. Rigging hardware is provided
to safely suspend the PSW-2 in elevated installations.
The PSW-2 can be equipped to operate with the Remote
Monitoring System (RMS) network and software
application. RMS displays signal and power levels,
driver and cooling fan status, limiter activity, and
amplifier temperature for all speakers in the network
on a Windows-based PC.
AC Power
When AC power is applied to the PSW -2, the Intelligent
AC™ supply automatically selects the correct operating
voltage, allowing the PSW-2 to be used internationally
without manually setting voltage switches. The Intelligent
AC supply performs the following protective functions
to compensate for hostile conditions on the AC mains:
• suppresses high voltage transients up to several
kilovolts
• filters common mode and deference mode radio
frequencies (EMI)
• sustains operation during low voltage periods
• provides soft-start power-up, which eliminates
high inrush current
TROUBLESHOOTING NOTE: If the Active LED does
not illuminate or the system does not respond to audio
input after ten seconds, remove AC power. Electronics
technicians with access to a test bench can contact
Meyer Sound to receive
Series MP-2 and MP-4 Field Verification Procedure
(part # 17.022.066.01). This service document contains a
series of tests to verify that the power supply and amplifier are functioning properly. Other users should contact
Meyer Sound or an authorized service center.
If the voltage decreases below the lower bound of either
operating range (brown-out), the supply uses stored
energy to continue functioning briefly . The unit turns off
if the voltage does not increase above the threshold
before the storage circuits are depleted. The time that the
PSW-2 continues to operate during br own-out depends
on how low the voltage drops and the audio source level
during this period.
If the voltage fluctuates within either operating range,
automatic tap selection stabilizes the internal operating
voltage. This tap selection is instantaneous and there are
no audible artifacts. If the voltage increases above the
upper bound of either range, the power supply turns off
rapidly, preventing damage to the unit.
If the PSW-2 shuts down due to either low or high voltage,
the power supply automatically turns on after three
seconds if the voltage has returned to either normal
operating range. If the PSW-2 does not turn back on after
ten seconds, remove AC power and r efer to the
SHOOTING NOTE
NOTE: We recommend that the supply be operated at
least a few volts away from the upper and lower bounds
of the operating windows to avoid brown-out and
possible shut-down.
The Meyer Sound Self-Powered
TROUBLE-
above.
3
Current Requirements
Safety Issues
The PSW-2 presents a dynamic load to the AC mains
which causes the amount of current to fluctuate between
quiet and loud operating levels. Since different types of
cables and circuit breakers heat up (and trip) at varying
rates, it is essential to understand the types of current
ratings and how they correspond to circuit breaker
and cable specifications.
The maximum continuous RMS current is the maximum
RMS current over a duration of at least 10 seconds. It is
used to calculate the temperature 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 maximum RMS
current over a one second duration. It is used to select
the rating for most magnetic breakers.
The maximum instantaneous peak current during burst
is used to select the rating for fast-reacting magnetic
breakers and to calculate the peak voltage drop in long
AC cables according to the formula
Vpk
= Ipk x Rtotal cable
drop
Use the table below as a guide to select cables and circuit
breakers with appropriate ratings for your operating voltage.
Pay close attention to these important electrical and
safety issues.
Use a power cord adapter to drive the PSW-2
from a standard 3-prong outlet (NEMA 5-15R;
125 V max).
earth
ground
chassis
ground
The PSW-2 requires a grounded outlet. Always
use a grounding adapter when connecting to
ungrounded outlets.
Do not use a ground-lifting adapter or cut the
AC cable ground pin.
sgnitaRtnerruC2-WSP
V511 V032 V001
SMRsuounitnoC.xaM
SMRtsruB.xaM
A8
A51
tsruBgniruDkaeP.xaM
A22
A4
SMR
A8
SMR
A11
KAEP
A01
SMR
SMR
KAEP
SMR
A81
SMR
A52
KAEP
The minimum electrical service amperage required by a
system of Meyer speakers is the sum of their maximum
continuous RMS currents. We recommend allowing an
additional 30% above the minimum amperage to prevent
peak voltage drops at the service entry.
TROUBLESHOOTING NOTE: In the unlikely case that
the circuit breakers trip (the white center buttons pop
out), do not reset the breakers! Contact Meyer Sound for
repair information.
Keep all liquids away from the PSW-2 to avoid hazards
from electrical shock.
Do not operate the unit if the power cables are frayed or
broken.
Tie-wrap anchors on the amplifier chassis provide strain
relief for the power and signal cables. Insert the plastic
tie-wraps through the anchors and wrap them around
the cables.
4
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