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MPA MULTI-CHANNEL POWER AMPLIFIER
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MPA 500us
2/1 Channel Mobile Audio Amplifier with 500 Watts Max. Power
Amplificateur audio mobile de 500 watts de puissance maximum à 2/1 canaux
Amplificador Móvil de Áudio de 2/1 Canales con Potencia Máx. de 500 vatios
Amplificador Móvel de Áudio de 2/1 Canais com Potência Máx. de 500 Watts
     B
LAUPUNKT
S
PECIFICATIONS
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MPA500
US
, 2/1 C
HANNEL
A
MPLIFIER
Below is a basic trouble-shooting guide to assist in seeking out and correcting a problem that may occur in the installation
process. Although lengthy, this chart cannot address every single problem possible but mainly the ones most common.
PARAMETER/FEATURE
VALUE
Channels
2/1 (3 in passive bridged mode)
Size ( W x H x D)
8.69 x 2.19 x 11.82 inches (220 x 56 x 300mm)
Weight
6.8 lbs (3.1 kg)
Crimping style speaker terminals?
YES
Maximum terminal wire size
8 ga.
Subsonic filter
YES (10 Hz)
Separate front/rear or left/right gains?
NO
Spade type auto fuses?
YES
Speaker short, short to +12V, and short to ground protection?
YES
High, low, and reverse voltage protection?
YES
Power output transistors
High current, bipolar outputs
Switching power supply transistors
High-Speed, MOSFET’s
Minimum speaker impedance
2 ohms (non-bridged mode only)
4 ohms
ONLY
in bridge mode
PERFORMANCE DATA
VALUE
Rated power output @ 0.1% THD
2 channels into 4 ohms / 2 ohms
2 x 100 W / 2 x 130 W
1 channel into 4 ohms
1 x 270 W
Total Harmonic Distortion @ rated full output
0.06% THD
Rated Signal/Noise ratio (averaged value)
> 90 dBA
Measured @ full rated power
105
Measured @ 1 watt / 1 kHz
85
Damping factor
>100
Frequency response (full-range mode)
20 - 50,000 Hz
High-pass crossover frequency limits
50 - 500 Hz (continuously variable control)
Low-pass crossover frequency limits
50 - 250 Hz (continuously variable control)
Input impedance
20 kOhms
Input signal voltage control range
0.3 - 4.0 Vrms
Current draw for undistorted output @ 14.4 VDC
@ full undistorted output, non-bridged
31.0 A (2 ch x 130 W x 4 ohms)
@ full undistorted output, bridged mode
51.0 A (1 ch x 350 W x 4 ohms)
@ 33% of undistorted power (full “music” power)
18.5 A (2 ch x 50 W x 4 ohms)
@ idle
0.5 A
Minimum battery voltage to maintain rated power
12.6 Volts DC
Usable battery voltage
10 - 18 Volts DC
Trigger line voltage range
10 - 18 Volts DC
Trigger line current draw
< 15 mA draw
Turn on delay time
@ 1.5 seconds
Thermal shutoff temperature (averaged heat-sink exterior temperature)
170°F (80° C)
NOTE: DUE TO ONGOING PRODUCT IMPROVEMENTS, DESIGN AND SPECIFICATIONS ARE SUBJECT TO CHANGE
WITHOUT ADVANCED NOTICE TO THE CONSUMER OR RETAILER.
 T
HANK
Y
OU FOR CHOOSING
B
LAUPUNKT
!
Congratulations!
You are the now the owner of an exceptional car audio amplifier from the audio enthusiasts at
Blaupunkt. Our engineering staff has spent considerable time refining our MPA series amplifiers in order to introduce great
sound to the consumer at an affordable price. With these products we focus on sonic performance but balanced with
rugged design and flexible installation.
Not only do we offer you a great product but also a supportive owners manual. This manual can be used as a teaching
guide due to its brief, but informative, explanations of amplifier and system design. We are also very concerned about the
end consumer using proper installation techniques for the highest performance possible from their new audio products.
MOST important to us are the concerns with safety and the installation process. Since our Blaupunkt retail dealers have the
tools and experience for an optimized and safe installation, we always recommend they do the final vehicle integration. But,
should you choose to install these products yourself, please take the time to read this manual completely and abide by all
precautions.
W
HAT IS AN
A
MPLIFIER
?
An amplifier, by definition, is a device that receives a small audio signal on its input and reproduces it with larger voltages (or
current) on its output. Ideally there should be no modifications of the signal other than to make the signal larger either in
voltage or current levels. If there are changes in the signal character it is considered a "distortion" of the input signal and in
most cases undesirable. With the added power of an amplifier you can play your system at higher volume levels without
worrying about such distortions that actually can damage the speakers and your ears (assuming of course that the amplifier
is NOT grossly over-driven).
The perfect amplifier will be able to reproduce any output voltage regardless of input signal level. But, infinite output voltage
is impossible due to upper limits created by the voltages found in a car, typically 12-15 volts DC. In order to achieve
undistorted power levels beyond about 20 watts per channel a switching power supply MUST be used to step up the
voltage "rails" inside an amplifier.
Amplifiers are rated in "watts" of audio output power but there are often references to "rms" power and "MAX" power. Rms
power is considered as "clean power" since it is undistorted power that is used for reproducing quality sound at all but the
highest listening levels. "MAX" power is the most power the amp will produce when driven deep into distortion. MAX
power is considered usable power only by the more "aggressive" listener since the original waveform is so distorted that it is
uncomfortable to listen to for most people. Regardless of the consumer's listening habits, we dual list these power levels so
everyone has an understanding of what they are purchasing.
K
EY
F
EATURES
Your new Blaupunkt MPA series amplifier, although a simple product, offers some important features. These include:
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"Multi-Mode" operation allowing for combined stereo high-pass/bridged mono subwoofer low-pass output capability.
2 ohm stability (in non-bridged mode) for paralleling two, 4 ohm speakers.
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RCA inputs (low level) allowing for your typical aftermarket radio signal level outputs.
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Modular inputs (high level) for tapping off of the speaker outputs of a factory radio for example to derive a subwoofer
signal for an add-on subwoofer speaker system.
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Internal low pass filters for easily deriving a subwoofer system without an add-on crossover that increases system
complexity and the potential for noise.
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Variable frequency low-pass and high-pass filters (on upper MPA models) for custom tailoring the crossover
frequency choice for any vehicle.
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Efficient heat-sink design to quickly wick away heat thus ensuring a life time of reliability.
Simple mounting system for ease of installation.
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S
AFETY
C
ONCERNS
We always recommend you have your Blaupunkt amplifiers professionally installed but the
installation process is often so easy that the average consumer can achieve success with little
trouble. Regardless of the person installing, you should be sure to review the following points
before proceeding with the installation:
READ THE MANUAL!
Understanding the product and installation limitations before
lifting a screwdriver.
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WEAR SAFETY GLASSES AT ALL TIMES
- Flying debris are always dangerous.
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PROTECT THE VEHICLE
- Always disconnect the negative battery cable before
starting any kind of installation work. This prevents a possible high current electrical
short (potential fires).
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HEAT
- Keep all audio components away from nearby hot vehicle components that heat up over time such as hoses,
high current wires, and braking system components.
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GIVE YOURSELF LOTS OF TIME
- Rushing to complete an installation nearly always ends up with problems.
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DO NOT LISTEN AT HIGH SOUND LEVELS FOR A PROLONGED TIME
- these amplifiers, used with high
efficiency speakers from ANY manufacturer, have the potential to cause permanent hearing loss after listening at
maximum volume levels for several hours.
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I
NSTALLATION
W
ARNINGS
!
Before disassembling your beautiful new car you need some basic installation knowledge and skill with common hand and
power tools. Following such basic installation tips and warnings will prevent possible damage to the vehicle and also
prevent possible fires.
AGAIN...READ THE MANUAL!
There is a lot of helpful information in this manual that
will save time and prevent problems later.
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COVER THE VEHICLE WORK AREAS
- Use fender covers or blankets to protect the
work areas from scratches or dings.
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DISCONNECT THE (-) LEAD ON THE BATTERY
- No sparks or fires please!
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“REVIEW” THE INSTALLATION
- Before using any tools or moving vehicle
components, take five minutes to review the installation intentions (e.g., verify that an
amplifier will fit in an area of a car before tearing out all the interior).
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“REVIEW” THE VEHICLE
- Before drilling any holes or cutting into any surfaces, make
sure there are no fuel or hydraulic lines behind the surfaces. Also make sure there are no
wires routed directly behind or near the desired mounting area (remember...screws can
often extend 1-2 inches behind the mounting surface).
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ENSURE PROPER FIT
- Before cutting or drilling, make sure the amplifier will physically
fit in its desired location. Check for clearance around rear deck torsion bars or other
structural elements.
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EVERY CAR IS ASSEMBLED DIFFERENT
- Every auto manufacturer uses different
assembly techniques. Take care in removing/modifying all trim panels and mounting surfaces since they often use
unique screws or snap fasteners that are difficult to replace if they are lost or broken.
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BE CAREFUL WITH CABLE ROUTING
- When routing audio cables, make sure RCA and speaker wires are
routed away from high current power lines for audio amplifiers and vehicle systems lines when possible. This will
help prevent noises from creeping into the audio system, plus prevent potential damage to the vehicle wiring itself.
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BE CAREFUL WITH ALL CONNECTIONS
- When making connections, make sure each connection is clean
and properly secured. Observe all polarity markings carefully to ensure proper end performance.
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CAUTION - FUEL TANKS AND FUEL LINES ARE NOW LOCATED DIRECTLY BENEATH THE REAR
DECK IN MANY CARS - CHECK FOR ADEQUATE CLEARANCE BEFORE EVEN CONSIDERING
SUCH A MOUNTING LOCATION!
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S
YSTEM
P
LANNING
Before wiring up an audio system that may not achieve the
sound quality you want, be sure to choose a system concept
that fits your listening requirements. Basic systems, a
receiver with internal 4x20 watts and 4 coax speakers, are
adequate for many listeners. But, when you want to really
“feel” the music, you will need some kind of subwoofer
amplifier/speaker combination. Although many people might
jump into an “add-on” amplifier to power to rear coaxial
speakers, a better choice is usually a subwoofer
amp/speaker system that supplements the existing 4 speaker
system as shown in the adjacent drawing. Such a system
provides a surprising improvement in sound quality due to
the usually dramatic increase in bass response.
Full-Range
Full-Range
Subwoofer
Full-Range
Full-Range
The next dramatic step up in performance is with a “multi-
channel” system that offers more dynamic range in the mids
and highs due to higher power plus more bass response due
to multiple woofers and/or more power. But, with such a
system, the stereo image and overall listening experience
usually becomes much more life-like due to better tonal
quality midrange/tweeter speakers and usually better
placement.
Supplementary subwoofer system
Tuner
Passive X-over
Sat Amplifier (4x50 W)
To build such a system though, complexity goes up due to
the addition of passive or active crossovers which take time
to install and may inject noise into the system due to potential
noise signal pick up. The results though of such a system
can be dramatically pleasing.
Sub Amplifier (2x100 W)
Subwoofers
High performance multi-channel system
I
NSTALLATION
T
OOLS
For most installations, simple hand tools are adequate to install an aftermarket amplifier. Depending upon the mounting
locations used, you will need power tools for drilling and cutting plastics and metal. A good starting list is summarized
below:
Tape measure and ruler
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Marking pen and starting punch
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Phillips and flat blade screwdrivers (small and medium sizes)
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Nylon wire bundle ties
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Pliers: standard vice-grip and needle nose styles
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Light-duty trim pry-bar for removing door trim
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Cutting shears or nibbling tool for cutting thin and medium gauger metal
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Wire cutters, wire strippers, electrical tape, crimping pliers and appropriate crimp-on
terminals
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Power drill with appropriate sized drill bits
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