Operating Instructions
650-P
Self-Powered Subwoofer
Patents Pending
Copyright © 1997, Meyer Sound Laboratories,
Inc. All rights reserved
Part #: 05.036.007.01 Rev B
Contents
U
L
C
U
L
Introduction ......................................................... 3
AC Power ............................................................ 3
Audio Input .......................................................... 5
Amplification and Protection Circuitry .................. 5
Configuration, Placement, and Polarity ...............7
Measurement and System Integration Tools ......8
Full-Range Systems ..........................................8
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 instruc-
tions
Pour indequer important
instructions
Zu wichtige betriebs-
anweisung und unter-
haltsanweisung zeigen
Para indicar importante funcionar
y mantenimiento instrucciones
Driver Troubleshooting .....................................10
Safety Summary ..............................................11
Specifications ...................................................12
Controls and Connectors ................................... 13
Dimensions........................................................ 14
Notes ...............................................................15
Contact Information ..........................................16
Frame or chassis
Masse, châssis
Rahmen oder chassis
Armadura o chassis Tierra proteccionista
Protective earth ground
Terre de protection
Die schutzerde
Name: Meyer Sound Laboratories
Address: 2832 San Pablo Avenue
Berkeley, California 94702-2204, USA
conforms to the following Product Specifications:
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,
1.0kV 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
2
Declaration of Conformity
According to ISO/IEC Guide and EN 45014
declares that the product:The Manufacturer:
Product Name: 650-P
Product Options: All
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
Vibration: 10 55Hz (0.010 m
on each of 6 sides
peak-to-peak excursion)
LISTED
U
L
®®
3K59
COMMERCIAL
AUDIO SYSTEM
U
L
C
Introduction
The 650-P, Meyer Sound’s most powerful self-powered
subwoofer , contains independent amplifier and control
electronics for two 18” drivers in a compact enclosure.
This integrated design improves performance, durability,
and reliability, eliminates amplifier racks, and simplifies
setup and installation.
The 650-P has the following acoustical specifications:
Frequency Response ±4 dB 28 100 Hz
Phase Response ±30° 45 145 Hz
Dynamic Range > 110 dB
See page 14 for complete specifications.
The 650-P is compatible with the Meyer MSL-4, CQ™
Series, and MTS-4 self-powered speakers and can be
used in any system requiring additional low frequency
reinforcement..
The 650-P can be equipped to operate with the Remote
Monitoring System (RMS™) interface 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. Contact Meyer Sound for
more information about RMS.
Voltage Requirements
The 650-P operates safely and without audio discontinuity if the AC voltage stays within the ranges 85–
134V or 165–264V, at 50 or 60Hz. Immediately after
applying AC power, the green Active LED on the user
panel illuminates and 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, and the system is
enabled to pass audio signals.
TROUBLESHOOTING NOTE: If the Active LED does not
illuminate or the system does not respond to audio input
after ten seconds, remove AC power to avoid possible
damage to the unit. Experienced electronics technicians
with access to a test bench can verify proper operation
for the power supply and amplifier system with The
Meyer Sound Self-Powered Series MP-2 and MP-4 Field
Verification Procedure (part # 17.022.066.01; contact
Meyer Sound to receive this document). All other users
should contact Meyer Sound or an authorized Meyer
service center.
If the voltage decreases below the lower bound of either
operating range (known as a brown-out period), the
supply uses current from its storage circuits and continues
to function briefl y. The unit turns off if the voltage does
not increase above the threshold before the storage
circuits are depleted. The length of time that the 650-P
continues to operate during brown-out depends on ho w
low the voltage drops and the audio source level during
this period.
AC Power
When AC power is applied to the 650-P, the Intelligent
AC™ supply automatically selects the correct operating
voltage, allowing the 650-P to be used in the US, Europe, or Japan without manually setting a voltage switch.
The Intelligent AC power supply also protects the 650P by performing surge suppr ession for high voltage transients (up to 275V), minimizing inrush current, and
filtering EMI. The 650-P uses a NEMA L6-20P or IEC
309 male power inlet and satisfies UL, CSA, and EC
safety standards.
Continuous voltages above 275VAC may damage
the unit!
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 650-P 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 650-P does not turn back on after
ten seconds, remove AC power and r efer to the TROUBLE-
SHOOTING NOTE above.
3
Current Requirements
Safety Issues
The 650-P 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 650-P
from a standard 3-prong outlet (NEMA 5-15R;
125V max).
earth
ground
chassis
ground
The 650-P 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.
sgnitaRtnerruCP-056
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 650-P 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.
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.
4
Power Connector Wiring Conventions
Use the following AC cable wiring diagram to create
international or special-purpose power connectors:
TROUBLESHOOTING NOTE: If abnormal noise (hum,
hiss, popping) is produced from the loudspeaker, disconnect the audio source from the speaker. If the noise
stops, then the problem is not within the loudspeaker;
check the audio input and AC power.
blue =
neutral
yellow/green =
earth ground
(chassis)
AC cable color code
If the colors referred to in the diagram don't correspond
to the terminals in your plug, use the following guidelines:
• Connect the blue wire to the terminal marked
with an N or colored black.
• Connect the brown wire to the terminal marked
with an L or colored red.
• Connect the green and yellow wire to the terminal
marked with an E (or ) or colored green (or
green and yellow).
brown = hot
Audio Input
A single source can drive multiple 650-Ps with a paralleled
input loop, creating an unbuffered hardwired loop
connection. Make certain that the source equipment
can drive the total load impedance presented by the
paralleled input circuit. For example, since the input
impedance of a single 650-P is 10 kOhms, cascading 20
650-Ps produces a balanced input impedance of 500
Ohms. If a 150 Ohm source is used, the 500 Ohm load
results in a 2.28 dB loss.
Amplification and Protection
Circuitry
Each driver in the 650-P is powered by one channel
of the Meyer MP-2, a 1240 W amplifier (620 W/ch)
utilizing complementary power MOSFET output stages
(class AB/H). The following sections discuss the MP-2’s
limiting circuitry and the two-fan cooling system.
TruPower™ Limiting System
The 650-P presents a 10 kOhmbalanced input impedance to a three-pin XLR connector wired with the following convention:
Pin 1 — 220 kOhm to chassis and earth ground (ESD
clamped)
Pin 2 — Signal
Pin 3 — Signal
Case — Earth (AC) ground and chassis
Shorting an input connector pin to the case can form
a ground loop and cause hum.
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 relative to pin 3, resulting in a positive
pressure wave when a positive signal is applied to pin 2.
Use standard audio cables with XLR connectors for
balanced signal sources.
Differential Inputs
Conventional limiters assume that the resistance of a
speaker remains constant and set the limiting threshold
by measuring voltage only. This method is inaccurate
because the speaker’s resistance changes in response to
the frequency content of the source material and thermal variations in the speaker’s voice coil and magnet.
Conventional limiters begin limiting prematurely , which
under-utilizes system headroom and deprives the speaker
of its full dynamic range.
The TruPower limiting (TPL) system accounts for varying
speaker impedance by measuring current, in addition
to voltage, to compute the power dissipation and voice
coil temperature. TPL impr oves performance befor e and
during limiting by allowing the speaker to produce its
maximum SPL across its entire frequency range. TPL
also extends the lifetime of the drivers by controlling
the temperature of the voice coil.
5
Loading...