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JBL Professional
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MPX SERIES
.
THE PERFECT
COMPLEMENT
FOR WORKING
PROFESSIONALS
.
MPX1200MPX1200
l
1600 Watts/CH into 2 Ohms
l
1200 Watts/CH into 4 Ohms
l
3200 Watts Bridged-Mono into 4 Ohms
l
This model can easily power any of our SR Series™, Architectural Series™ or Array Series™
systems. A superb choice for subwoofer systems.
MPX600MPX600
l
850 Watts/CH into 2 Ohms
l
600 Watts/CH into 4 Ohms
l
1700 Watts Bridged-Mono into 4 Ohms
l
An ideal choice for powering our 4 Ohm SR Series™ rated at 600 Watts or MR Series™
loudspeaker systems.
MPX3OOMPX3OO
l
450 Watts/CH into 2 Ohms
l
300 Watts/CH into 4 Ohms
l
900 Watts Bridged-Mono into 4 Ohms
l
Ideal for powering smaller loudspeaker systems or as the power source for mid and high
frequency components in bi- or tri-amped systems.
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After decades of creating the best possible
loudspeaker components and systems for the
professional audio industry, JBL is proud to offer
the MPX Series of professional power amplifiers.
Night after night, concert after concert, you know
you can depend on JBL speakers. Now, with the
MPX line, JBL makes it possible to afford the same
level of performance and reliability in the rest of
your professional sound system.
The MPX Series starts with a design platform that
has endured years of road use with proven
reliability. The patented Grounded Collector®
design enhances power transistor cooling by
eliminating the need for transistor insulating wafers
— the deterioration of which is one of the primary
causes of amplifier failure.
Starting with this design, we added important
performance features, enabling you get the most
from your sound system:
l Oversized heat sinks and extra large high
volume fans keep the MPX amps cool in even the
highest ambient temperature environments.
l Low noise design ensures quiet operation.
l A variety of input connectors, including a
versatile removable barrier strip, makes hookup
and installation quick, easy, and secure.
l Transducer excursion protection circuitry
keeps speakers working reliably night after night.
l Power levels and high dynamic headroom
match the requirements of your professional JBL
loudspeaker system.
In short, JBL’s MPX amplifiers are the perfect
complement for your high performance
professional sound system.
RUNNING COOL
MPX amplifiers endure the ongoing punishment of
continual operation, even in high ambient
temperature environments. Multi-step power
supplies in the larger models run more efficiently
than conventional amplifiers, generating less heat.
Oversized heat sinks provide extra surface area for
cooling. Large high volume fans quietly blow up to
3.6 cubic feet of air every second directly onto the
heatsinks, resulting in highly efficient ‘turbulent”
cooling. Multiple speeds allow the fans to run
slowly when cooling is not needed, increasing
speed automatically as extra cooling is required.
cabling. In addition, the latest technology
components are incorporated throughout the
design to ensure extremely low noise generation
from all MPX Series power amplifiers.
CONNECTOR VERSATILITY
MPX Series connections are extremely versatile.
On the input panel, you have a choice of balanced
or unbalanced XLR, 1/4 inch TRS jacks or a barrier
strip. The barrier strip provides a high measure of
connection reliability, yet is removable, making it
possible to make all hard-wire connections on a
workbench rather than behind a dark cramped
equipment rack. The barrier strip's grounding
jumpers allow you to configure the amp’s grounds
to accommodate most large system grounding
schemes.
Oversized heatsinks and powerful multiple-speed cooling
fans increase reliability and maintain stable, consistent
performance.
This outstanding cooling capability allows
MPX Series to deliver power continuously in high ambient
temperature environments or into low impedance loads
longer than most other amplifiers.
The result, MPX amps run longer continuously
than most other power amplifiers on the market
today, without interrupting your performance by
going into thermal limiting or protection mode.
QUIET OPERATION
High quality double flux-banding of the power
transformers reduces external magnetic field
radiation, which can, in other power amplifiers,
induce audible hum into associated equipment and
In addition to balanced or unbalanced XLR and 1/4 inch
TRS phone jack connectors, we also provide a barrier strip
which is removable, making it possible to make all hardwire connections on a workbench rather than behind a
dark cramped equipment rack.
High quality output connectors accept dual banana
plugs as well as bare wire up to 8 gauge. For
additional reliability and safety, the bare wire ends
are securely contained in enclosed compartments
at the base of the banana jacks where they cannot
contact each other, the amp chassis, any stray wires
from the amp rack . . . or your fingers.
Easy-to-read graphics on the back panel give
instructions for configuring and connecting your
amplifier.
High quality double flux-banded power transformers
reduce noise levels and magnetic field radiation which can
generate hum in associated equipment and cabling.
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PROTECTION FOR YOUR
LOUDSPEAKERS
MPX Series amplifiers provide the protection
of a steep 30 Hz high-pass filter that keeps
inaudible, but damaging, infrasonic (also
called subsonic) frequencies from reaching
your loudspeakers. Today's vented speaker
systems can be damaged by signals below their
resonant port tunings, which are typically
around 30 Hz or 40 Hz. These low
frequencies can cause excursion (cone travel)
beyond the loudspeaker’s safe capability.
Because these infrasonic signals can be
induced into your system anywhere along the
signal path, filtering incorporated in line level
equipment does not protect from signals
induced later in the chain. The MPX Series
provides the safety of filtering these potentially
damaging signals just before they get amplified
and sent to your loudspeakers.
The high-pass filter may be defeated for
applications such as driving digital cinema
subwoofers, where energy below 30 Hz is
required, and where the speakers are
specifically designed to safely accept this
spectral content.
Other loudspeaker protection features include
relays to protect against DC offset and a
muting circuit to eliminate turn-on surges
when powering up. In addition, the largest
model, the MPX1200, provides clip limiting.
MPX Series incorporate professional amplifier
self-protection features, including full
protection for short circuit, open circuit,
ultrasonic and RF conditions, as well as
current limiting and thermal muting.
STABLE WITH ANY LOAD
You never know what load you’re going to
have to drive on any particular night. Maybe
one night some of your equipment racks don’t
show up at the venue . . . or you find you
have to add a few extra speakers to cover an
odd-shaped room. Perhaps a speaker cable
develops an intermittent short that could cause
other amplifiers to fail. With your MPX
amplifier, you can drive into any impedance
load, even below 2 ohms, safely and reliably.
Whether you use an amplifier from JBL or
from another company, we highly recommend
operating nominal load impedances of 4 ohms
or higher to obtain optimum performance
from your sound system. Unrelated to the
capabilities of the power amp itself, sound
systems utilizing very low load impedances
incur greater line losses through the speaker
cabling, higher distortion, and deteriorated
speaker damping (“flubby” lows).
While it’s not a good idea to run low
impedances, it’s comforting to know that your
MPX amp can take it if you ever find yourself
in a situation where you have to occasionally
run a low impedance load. To help out in
these situations, the extra cooling capability
means MPX’s will run longer continuously into
low impedances before overheating than most
other amplifiers.
40
35
30
25
20
15
10
AGENCY APPROVALS FOR SAFETY
AND PERFORMANCE
As a measure of safety you will be pleased to
know that MPX Series amplifiers are UL listed
as well as approved by the CSA and TUV safety
agencies.
An added plus, MPX amplifiers are approved
by Lucasfilm Ltd.
®
for use in THX® cinema
system installations*. This approval ensures
that the product has met or exceeded stringent
performance and power output requirements,
as determined by the experts at Lucasfilm
®
FIGURE 1
TRANSDUCER EXCURSION
This illustration explains the protective action of the
3OHz, 18 dB per octave high-pass filter which, when
engaged, effectively limits low frequency transducer cone
excursion to within a safe range. The dotted line
indicates a damage threshold based on cone travel
(excursion). Note bow easily this threshold can be
reached and exceeded at infrasonic (subsonic)
frequencies with no filter protection. With the filter
engaged, you have substantially greater protection from
.
cone “over excursion” at these frequencies.
POWER TO SPARE
MPX Series power amplifiers deliver
continuous power capability that accurately
matches the power handling capabilities of
most JBL professional loudspeaker systems.
In addition, MPX Series amplifiers feature a
high dynamic headroom capability of nearly 3
dB, for clear and powerful transients. This
reduces the incidence of amp clipping, which
is the most frequent cause of compression
driver failure.
THE RIGHT AMPS FOR
WORKING PROFESSIONALS
The MPX Series power amplifiers include the
features that working professionals need most,
so you get the best performance from your
professional sound system. As a working
professional, your amplifiers must meet the
challenges of today’s demanding audio
environment . . . MPX Series fits the bill.
*
THX is a registered trademark of Lucasfilm, Ltd.
FIGURE 2
ACOUSTIC ON-AXIS RESPONSE
With the filter engaged, low frequency response is
smoothly contoured to deliver balanced output while
eliminating only the unusable and potentially dangerous
infrasonic energy.
TRANSDUCER EXCURSION (PEAK)
Xd mm
WITHOUT FILTER
5
0
10
ACOUSTIC ON AXIS RESPONSE: SPL, PHASE
dB
100
95
90
85
80
75
70
65
60
10
20 30 40 50 70 100
FREQUENCY
WITHOUT FILTER
WITH FILTER
20 30
40 50
FREQUENCY
WITH FILTER
100
70
Hz
Hz
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NOMINAL RATED OUTPUT POWER
2
ohm load/channel:
1
:
MPX300
4 ohm load/channel:
8 ohm load/channel:
4 ohm bridge:
8 ohm bridge:
TYPICAL MIDRANGE OUTPUT POWER
2
ohm load:
2
:
4 ohm load:
DlSTORTlON @ RATED POWER :
1
kHz, 8 ohm load (typical):
1 kHz, 4 ohm load (typical):
20 Hz - 20 kHz, 8 ohm load:
20 Hz - 20 kHz, 4 ohm load:
Frequency Response:
Damping Factor:
Dynamic Headroom:
Noise:
Sensitivity:
Input Impedance:
CONTROLS :
Front Panel:
20 Hz to 20 kHz, ± 0.15 dB
Greater than 200 at 8 ohms
2.5 dB at 4 ohms
100 dB below rated output (20 Hz to 20 kHz)
1 V rms for rated power (8 ohms)
10 K ohms unbalanced, 20 K ohms balanced
AC switcb,
Ch 1 & Ch2Gain
Ch 1 & Ch 2 High Pass Filter switches
Rear Panel:
INDICATORS (EACH CHANNEL) :
Power:
Signal Present:
Protect:
CONNECTORS (EACH CHANNEL) :
Input:
Slide switch for Stereo, Dual Mono (paralleled inputs) or Bridged Mono input and output configurations
Green LED
Green LED
Clip:
Red LED
Red LED
XL-type 3 pin (pin 2 high)/6.3 mm (1/4 in) TRS combination connector and
removable barrier strip with separate chassis ground terminal
Output:
Cooling:
MPX1200:
MPX600:
MPX300:
Amplifier Protection:
Binding Posts, touch resistant, accepts dual banana plugs and up to #8 AWG bare wire
Rear-To-Front Airflow (all models)
Continuously variable speed fan
Two-speed fan
Two-speed fan
Full short circuit, open circuit, ultrasonic and RF protection, current limiting, thermal muting; stable into reactive or
mismatched loads. MPX1200 additionally has thermal/clip limiting
Load Protection:
Output Circuit Type:
MPX1200:
MPX600:
MPX300:
Power Requirements:
Dimensions (HxWxD):
Net Weigbt:
Shipping Weight:
Agency Approvals:
Supplied Accessories:
Optional Accessories:
On/off muting, DC fault load grounding relay with internal fault fuses. MPX1200 additionally has clip limiting
Complementary linear, high efficiency outputs
3 step
2 step
No step
V, 120 V, 220 V, or 230 V AC, 50-60 Hz (not user configurable)
100
133
x 483 x 408 mm (rack depth 404 mm) 5.25 x 19 x 16.1 in (rack depth
18.7 kg (41 lbs)
22.3 kg (49 lbs) 25.1 kg (55 lbs)
UL, CSA, TUV and approved by Lucasfilm for THX
Gain control locking plugs
MP-RRB1
(Rear
1
Both channels driven 20 Hz - 20 kHz,120 V 60 Hz mains.
2
Typical 1 kHz @ 1% THD, 120 V 60 Hz mains.
JBL continually engages in research related to product improvement. New materials, production methods and design refinement may be introduced into
existing products without notice as a routine expression of that philosophy. For this reason, current JBL product may differ in some respect from its published
description but will always equal or exceed the original design specifications unless otherwise stated.
450 W
300 W
200 W
900 W
600 W
500 W
360 W
0.004%
0.007%
0.15%
0.2%
(detents@0
dB, -2
Rack Ear Brackets, set of two)
MPX600
850 W 1600 W
600 W
400 W
1700 W
1200 W 2400 W
880 W 1640 W
700 W
0.015%
0.030%
0.15%
0.2%
dB,-4dB, -6
®
system installations
dB,-8dB,
21.5 kg (47 lbs)
-10
dB,
15.9
-12
dB, -14 dB,
in)
MPX1200
1200 W
8OO W
3200 W
1340 W
0.020%
0.025%
0.15%
0.2%
-18 dB, -24 dB,
29.5 kg (65 lbs)
33.1 kg (73 lbs)
∞),
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CAT MPX
CRP 15M 5/97
JBL Professional
8500 Balboa Boulevard
Northridge, CA 91329
A Harman International Company
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