JBL MPC User Manual
MPC Series
Power Amplifiers
Owner’s Manual
TD-000074-00
TD-000074-00
Rev. C
21
Table of Contents
Table of Contents ................................................................................................................................................................................... 1
Warning notices ..................................................................................................................................................................................... 2
Speaker Output Shock Hazard ......................................................................................................................................................... 2
Rack Mounting Precautions ............................................................................................................................................................ 2
Lifting Precautions ........................................................................................................................................................................... 2
Description ............................................................................................................................................................................................ 3
Inputs ..................................................................................................................................................................................................... 5
Outputs .................................................................................................................................................................................................. 6
Driving Distributed Lines ..................................................................................................................................................................... 7
Low-Impedance and Distributed Speakers on T-Version Amplifiers .............................................................................................. 7
Using Multiple Distributed Line Voltages ...................................................................................................................................... 10
Bridged Mono Mode ............................................................................................................................................................................ 10
MPC200 & 200T Bridged Mono Configuration .............................................................................................................................. 11
MPC300, 300T, 600 & 600T Bridged Mono Configuration ............................................................................................................. 11
Bridged Mono Speaker Connection ................................................................................................................................................ 11
Low Impedance Bridged Mono ...................................................................................................................................................... 12
High Impedance Bridged Mono ..................................................................................................................................................... 12
Parallel Mono Configuration ................................................................................................................................................................ 12
Controls ................................................................................................................................................................................................ 13
Displays ................................................................................................................................................................................................ 13
AC Power .............................................................................................................................................................................................. 14
Operation .............................................................................................................................................................................................. 14
MPC200 & 200T .............................................................................................................................................................................. 14
MPC300, 300T, 600, & 600T ............................................................................................................................................................ 14
Protection Circuits ................................................................................................................................................................................ 14
Glossary ................................................................................................................................................................................................ 15
Specifications ........................................................................................................................................................................................ 16
Power Consumption ............................................................................................................................................................................. 17
Heat Emission ...................................................................................................................................................................................... 18
Troubleshooting ................................................................................................................................................................................... 19
For Further Assistance ......................................................................................................................................................................... 20
WITHIN THE UNITED STATES: .............................................................................................................................................. 20
General Information or Technical Assistance ................................................................................................................................. 20
Repairs ............................................................................................................................................................................................. 20
OUTSIDE THE UNITED STATES: ............................................................................................................................................ 20
1
Cautions Sicherheitsvorschriften
Rack Mounting Precautions
To avoid damage to the amplifier mounting ears and/or
rack rails, the amplifier must be supported at all four corners
when used in portable racks.
Consult JBL Service Dept for availability of Rear
Support Brackets.
Lifting Precautions
In order to safely move or install the amplifier, it is
recommended that two persons share the weight when lifting
and positioning the unit.
CAUTION
TO AVOID ELECTRIC SHOCK, DO NOT INSERT FINGERS
OR OBJECTS INTO ANY OPENINGS IN THE CHASSIS.
Sicherheitsvorschriften für den Einbau in ein Gestell
Um Schäden auf den Befestigungsleisten des Verstärkers
und/oder den Gestellschienen zu vermeiden, muß der
Verstärker beim Einbau in ein tragbares Gestell an allen vier
Ecken gestützt werden.
Erkundigen Sie sich bei der JBL-Kundendienstabteilung
nach Stützen für die Rückseite des Verstärkers.
Sicherheitsvorschriften beim Hochheben
Um den Verstärker sicher zu verschieben oder
einzubauen, wird empfohlen, das Gewicht des Verstärkers
beim Hochheben und Verschieben gleichmäßig auf zwei
Personen zu verteilen.
VORSICHT
UM ELEKTRISCHEN SCHLAG ZU VERMEIDEN, KEINE
FINGERN ODER GEGENSTÄNDE IN ÖFFNUNGEN DES
GEHÄUSES STECKEN.
Warning notices
Speaker Output Shock Hazard
A MPC amplifier is capable of producing hazardous output voltages. To avoid electrical
shock, make sure the cover is in place over the output terminals, and do not touch any
exposed speaker wiring while the amplifier is operating.
Rack Mounting Precautions
To minimize twisting stress of the front mounting ears, the amplifiers internally mounted
output transformers are located close to the front panel. Nevertheless, when rack mounting
any MPC amplifier, make sure it is well supported at all four corners to avoid damage to
either the amplifier mounting ears or to the mounting rails. Rear support brackets are
available.
Lifting Precautions
In order to safely move or install the amplifier, it is recommended that two persons share the
weight when lifting and positioning the unit.
2
Description
The MPC Series from JBL is a line of professional power amplifiers specifically designed for
contracting applications. There are six models, each with two independent channels. Each
model in the MPC Series line is available in a T version for driving either 200V, 140V, 100V,
70V, 50V, or 25V constant voltage lines and in a non-T versions for driving loudspeaker
systems with impedances as low as 2 ohms. (See section on bridging for information about
200V, 140V, and 50V drive capabilities).
Power CapabilitiesThe table below lists the power ratings under various load conditions:
ledoM4ΩΩΩΩΩ
002CPM
T002CPM
1
2×W5222×W053
2×W5222×W0532×W571
2ΩΩΩΩΩ
2
stloV001stloV07stloV52
3
3
2×W571
3
2×W051
003CPM
T003CPM
006CPM
T006CPM
1
FTC watts per channel, 20 Hz20 kHz, 0.1% THD
2
EIA watts per channel, 1 kHz, 1% THD
3
Watts per channel, band limited for 50 Hz15 kHz response, 0.25% THD
4
Watts per channel, band limited for 45 Hz15 kHz response, 0.25% THD
2×W0032×W054
2×W0032×W0542×W052
2×W0062×W009
2×W0062×W0092×W005
Channel SeparationEach channel has its own power transformer secondary to provide
maximum audio separation (minimum sound leakage) between the two channels, minimizing
interaction that can otherwise occur on amplifiers with a common power supply.
High EfficiencyThe MPC200, 200T, 300 & 300T utilize complementary Class AB linear
output circuitry. For improved efficiency, the MPC600 and 600T utilize Class H step-linear
complementary output circuitry using multi-rail power supplies.
High Cooling CapacityEvery MPC amplifier features a large diameter two-speed fan and
massive extruded aluminum heat sinks. The output devices couple directly to the heat sink.
This provides better cooling of the output devices while eliminating problematic insulating
wafers that are an integral part of most other amplifier designs. Forced air cooling in a backto-front direction provides for more effective cooling, preventing problems that otherwise
occur from a continual heat build-up inside the equipment rack, which occurs in amplifiers
with front-to-back or side-to-side flow schemes. These design factors allow the MPC amplifiers to work in high duty-cycle instances when many other professional amplifiers cannot.
4
4
4
2×W052
4
2×W005
4
2×W002
4
2×W004
Weight BalanceThe power transformers, as well as the output transformers on the T
models, are mounted in the front of the amplifier chassis, as close to the front mounting rails
as possible. This keeps the units center of gravity forward to minimize the twisting force on
the front mounting ears.
Rail SupportThe amplifier should be supported at all four corners, especially if it is in a
portable rack. The flow-through cooling scheme allows you to rack-mount the amplifiers on
top of the other, with no clearance necessary in between. This mounting technique also helps
support the weight of the upper amplifiers. In permanent fixed installations, the rear of the
amplifiers can receive physical support by installing the amplifiers at the bottom of the
equipment rack. Make sure that the direct weight of the back of the amplifier is supported
from the bottom of the rack.
Dimensions
a) HeightThe MPC200 and 200T are 2 rack spaces high. The MPC300, 300T, 600 and
600T are 3 rack spaces high.
3
1
CH1
CH2
CH1
CH2
BRIDGE
MONO
BRIDGE
MONO
LOW IMPEDANCE
LOW IMPEDANCE
DIR. OUTPUT
DIR. OUTPUT
ISOL.OUTPUT
ISOL.OUTPUT
AUDIO TRANSFORMER
AUDIO TRANSFORMER
70V
70V
25V
25V
100V
100V
070100
070100
0
0
-dB -dB
10 10
88
66
44
22
24
24
18 18
14
14
STEREO
12
12
CH2 INPUT CH1
CH2 C H1
PARALLEL BRIDGE LEVELLEVEL
GROUND
INPUT
7 8 14
6
10
1113 13
711
109
BRIDGE
MONO
BRIDGE
MONO
CH1CH2
OUTPUT OUTPUT
0
0
-dB -dB
10 10
88
66
44
22
24
24
18 18
14
14
STEREO
12
12
CH2 INPUT CH1
CH2 C H1
PARALLEL BRIDGE LEVELLEVEL
GROUND
INPUT
7 8 14
613 13
7
109
11
10
CH2 CH2
BRIDGE
MONO
LOW IMPEDANCE
DIR. OUTPUT ISOL.OUTPUT
AUDIO TRANSFORMER
70V 25V
100V
070100
CH1 CH1
BRIDGE
MONO
LOW IMPEDANCE
DIR. OUTPUT ISOL.OUTPUT
AUDIO TRANSFORMER
70V 25V
100V
070100
0
0
-dB -dB
10 10
88
66
44
22
24
24
18 18
14
14
12
12
CH2 INPUT CH1
CH1CH2
LEVELLEVEL
GROUND
INPUT
13
7 8
1113
7
109
BRIDGE
MONO
BRIDGE
MONO
CH1CH2
OUTPUT OUTPUT
0
0
-dB -dB
10 10
88
66
44
22
24
24
18 18
14
14
12
12
CH2 INPUT CH1
LEVELLEVEL
GROUND
INPUT
CH1CH2
13
7 8
13
7
109
4 45
512 12
(MPC300, 300T, and 600 are similar)
MPC600T front panel
MPC200T front panel
(MPC200 is similar)
33
22
12 2412 12
MPC300T and 600T rear panel
1 Power Switch
2 Power Indicators (Ch. 1 & Ch. 2)
3 Signal Indicators (Ch. 1 & Ch. 2)
4 Clip Indicators (Ch. 1 & Ch. 2)
5 Protect Indicators (Ch. 1 & Ch. 2)
6 Accessory Slot Cover
7 Gain Control
8 Detachable Input Header Block
9 Cooling Fan
10 Shrouded Output Connector (Direct Outputs)
11 Shrouded Output Connector (Audio Transformer Outputs)
12 Mounting Holes for Optional Handles
13 Rear Support Ears
14 Parallel/Stereo/Bridge Switch
4
MPC300 and 600 rear panel
MPC200T rear panel
MPC200 rear panel
Inputs
Loosen screw,
insert wire here,
then tighten screw.
Ground
Ground
Channel 2+
Channel 2-
Ground
Channel 1-
Channel 1+
b) DepthThe amplifiers require a rack depth of 45.7 cm (18 in) to clear the rear support
ears. The rear panel is 42.9 cm (16.9 in) behind the plane of the front mounting rails, allowing
some room for routing of wires.
Stability, Reliability and ProtectionThe MPC Series is engineered for stability and
exceptional reliability, with protection for open or short circuits and mismatched (underimpedance) loads. Protection is also built-in for ultrasonic, infrasonic (subsonic) and RF. To
protect the loudspeakers the outputs mute during turn-on and turn-off and also in the event
of a DC load fault. (The MPC200 and 200T are AC coupled and cannot pass DC to the load;
thus DC fault muting is not required on these models.) See section on Protection Circuits for
additional information.
All protection circuitry automatically resets to normal when conditions assure safe operation.
MPC amplifiers feature balanced inputs, connected via a Euro-style 7-terminal
detachable header.
Wire jumper
between
input and
ground
Shield
Balanced ConnectionAttach as shown. Connect the (+) wire, (-) wire and ground wire to
terminal pins as marked.
Unbalanced ConnectionAttach input signal wires as shown. Use the non-inverting (+)
input and the ground terminals of the header, and also connect a wire jumper between the
inverting (-) input and the ground terminal. The wire jumper will prevent a reduction in gain
caused by a floating unbalanced input.
Signal conductor
Input SensitivitiesAudio signals of the following levels will produce full rated output
power at 8 ohms with the volume control turned up full.
MPC200 & 200T 0.96 Volts
MPC300 & 300T 1.02 Volts
MPC600 & 600T 1.00 Volts
5
Outputs
Covered barrier strips located on the rear panel allow safe, shockproof speaker cable connections to the amplifier outputs. See the diagrams for details on connecting speakers and/or
distributed (25V, 70V, 100, 140V, and 200V) lines. Insulated connectors of the type shown are
recommended. Always make sure the amplifier is turned off before you change any output
connections or before lifting the safety shroud.
For driving 140V or 200V distributed lines, the amplifier must be set into bridged mono
mode. See Bridged Mono Mode section later in this manual for information about this
mode.
Lift safety shroud.
Loosen screw terminals.
Insert wire connectors
under screws.
Tighten screw terminals.
Lower safety shroud.
Output connection for “T” models,
CH1 CH1
DIR. OUTPUT ISOL.OUTPUT
Output connection for MPC, bridged mono mode. Output connection for MPC, parallel or stereo mode.
BRIDGE
MONO
CH1CH2
Ω
16
Ω
8
Ω
4
OUTPUT OUTPUT
BRIDGE
MONO
Output connection for MPC “T” models, bridged
mono mode.
AUDIO TRANSFORMER
LOW IMPEDANCE
16
8
4
CH1
DIR. OUTPUT
Ω
Ω
Ω
CH2
DIR. OUTPUT
LOW IMPEDANCE
BRIDGE
MONO
BRIDGE
MONO
070100
70V
AUDIO TRANSFORMER
070100
70V
100V
100V
CH1
ISOL.OUTPUT
25V
CH2
ISOL.OUTPUT
25V
Output connection for “T” models,
25 volt line.
LOW IMPEDANCE
AUDIO TRANSFORMER
070100
LOW IMPEDANCE
CH1 CH1
DIR. OUTPUT ISOL.OUTPUT
50 volt line.
AUDIO TRANSFORMER
070100
OUTPUT OUTPUT
8
Ω
4
Ω
2
Ω
BRIDGE
MONO
Output connection for MPC “T” models, direct low
impedance.
LOW IMPEDANCE
CH1 CH1
DIR. OUTPUT ISOL.OUTPUT
8
Ω
4
Ω
2
Ω
BRIDGE
MONO
Output connection for “T” models,
CH1 CH1
DIR. OUTPUT ISOL.OUTPUT
BRIDGE
MONO
AUDIO TRANSFORMER
070100
70V 25V
100V
100 volt line.
LOW IMPEDANCE
CH1CH2
AUDIO TRANSFORMER
070100
8
Ω
4
Ω
2
Ω
70V 25V
BRIDGE
MONO
100V
Output connections for “T” models, bridged
mono mode, 140 volt line
AUDIO TRANSFORMER
LOW IMPEDANCE
CH1
DIR. OUTPUT
CH2
DIR. OUTPUT
BRIDGE
MONO
LOW IMPEDANCE
BRIDGE
MONO
070100
70V
AUDIO TRANSFORMER
070100
70V
100V
100V
CH1
ISOL.OUTPUT
25V
CH2
ISOL.OUTPUT
TO 140V LINE
25V
BRIDGE
MONO
70V 25V
100V
BRIDGE
MONO
Output connections for “T” models, bridged
mono mode, 200 volt line
LOW IMPEDANCE
BRIDGE
MONO
LOW IMPEDANCE
BRIDGE
MONO
AUDIO TRANSFORMER
070100
70V
25V
100V
AUDIO TRANSFORMER
070100
70V
25V
100V
CH1
ISOL.OUTPUT
CH2
ISOL.OUTPUT
TO 200V LINE
CH1
DIR. OUTPUT
CH2
DIR. OUTPUT
70V 25V
100V
6
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