Precision Power Maxx Bass Bedienungsanleitung

MaxxBass®

TABLE OF CONTENTS
Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Why Use
MaxxBass
®
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Why is
MaxxBass
®
Better . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
What is
MaxxBass
®
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
How does
MaxxBass
®
Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
MaxxBass
®
Signal Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Installation/Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
MaxxBass
®
Outline and Dimensions . . . . . . . . . . . . . . . . . . . . . . .8
Wiring Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Wiring Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
MaxxBass
®
Processor Settings . . . . . . . . . . . . . . . . . . . . . . . . . .13
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1

CONGRATULATIONS
Thank you for choosing
PrecisionPower
TM
audio equipment. At
PrecisionPower
TM
we proudly design, engineer and manufacture
audio products for aftermarket car audio. Our award winning
engineering team utilizes innovative technology to consistently
deliver Absolutely State of the Art performance, sound quality,
reliability, and value. This
PrecisionPower
TM
product reflects our
commitment to offer you unparalleled versatility and quality for years
of dependable service and listening enjoyment.
SERVICE
Do not attempt to service
PrecisionPower
TM
products yourself.
Performing exploratory surgery on your audio equipment yourself
will void the warranty.Many parts of your
PrecisionPower
TM
gear are
custom built to our specifications. Our factory parts are not made
available to anyone else nor are they for sale. Our goal is to make
sure that your
PrecisionPower
TM
will always sound as good as the
day it was purchased. Contact your authorized
PrecisionPower
TM
dealer about obtaining any warranty service through
PrecisionPower
TM
. (See Warranty on back cover).
(Record listing for Model, Serial Number, and Purchase Date)
Model _____________________
Serial Number _______________
Purchase Date _______________
CAUTION
The extended use of a high-powered audio system may result in
hearing loss or damage. While
PrecisionPower
TM
systems are
capable of "Concert Level" volumes with incredible accuracy, they
are also designed for you to enjoy more reasonable levels all of the
sonic subtleties created by musicians. Please observe all local
sound ordinances.
2

WHY USE MAXXBASS
PrecisionPower
TM
will introduce the first
MaxxBass
®processor to
the automotive market. The
MaxxBass
®processor is ideal for
improving the perceived bass response in door mounted speakers
without upgrading the speakers or amplifiers.
MaxxBass
®provides subwoofer like performance with perceived
bass response to 30-40Hz on door mounted speakers. The
MaxxBass
®Processor is recommended in two configurations.
(Please see Wiring Configurations for more details.)
1) Front Stereo Configuration
One
MaxxBass
®Processor is used between the front channel
source and front speaker amplifier to increase the bass response on
only the front speakers. This is recommended to improve bass
imaging in high performance systems with rear mounted
subwoofers.
2) Dual Stereo Configurations
For systems without rear subwoofers, the user may prefer to use two
MaxxBass
®Processors, one for the front speakers and one for the
rear speakers. Although not nearly as good bass performance as
using a high performance subwoofer, this configuration will provide
close to subwoofer like performance without the space requirements
of a high performance subwoofer. This is a practical alternative for
bass performance where a subwoofer system can not be added.
WHY IS MAXXBASS BETTER
MaxxBass
®is NOT a bass boost technology. Bass boost
technologies try to compensate for lack of bass frequency range by
equalizing or increasing the relative volume of the frequencies near
the speaker limit.
This increases amplifier and speaker excursion limits, which
can damage the system at high levels.
This destroys the intended frequency balance of music.
3

MaxxBass uses psychoacoustics to extend the perceived bass
frequency response.
It is proven to provide up to 1.5 octaves of increased bass
range.
It does not change the frequency balance of the music and
sounds more natural than large bass boosts.
It does not require more amplifier power and speaker
excursion.
It has been proven over many years of use in professional
audio recording.
WHAT IS MAXXBASS
MaxxBass
®is a patented technology, which extends the bass
frequency range by allowing listeners to perceive bass frequencies
more than an octave below the physical limitations of speakers
systems. In cars
MaxxBass
®allows door mounted speakers that
typically drop off below 70-100Hz to play down another octave or
more.
This is accomplished using the science of psychoacoustics on how
we perceive sound.By building audio systems optimized for how we
hear sound, significant performance improvements can be obtained.
This is analogous to designing and building televisions that only
display red, green and blue dots.When we view these displays our
visual perception combines these dots to make a full color spectrum
without needing to reproduce all the necessary color frequencies.
Unlike other bass technologies
MaxxBass
®delivers more perceived
bass while simultaneously reducing the likelihood of damaging
speakers and amplifiers.
MaxxBass
®also delivers this extended
bass without any perceived distortion.
MaxxBass
®technology has
been used for years in mastering most of the world's most popular
music.
4

5
HOW DOES MAXXBASS WORK
MaxxBass
®uses advanced digital signal processing based on the
proven psychoacoustic Phenomenon of the Missing Fundamental.A
basic description and a
MaxxBass
®Signal Flow diagram are
provided for interested users.
MaxxBass
®first implements a crossover at the
MaxxBass
®
Frequency. The
MaxxBass
®Processor allows the choice of 60Hz,
generally suggested for 6-6.5" drivers, and 80Hz suggested for 4-
5.25" woofer drivers.
The low pass filter (LPF) output of the crossover extracts the bass
signal which is below the bass frequency response of the system.
This is the signal to be reproduced psycho-acoustically and only this
signal receives the
MaxxBass
®processing. It is significant to note
that unlike bass boosts,
MaxxBass
®does not add or change the
processing of higher frequencies that can be reproduced by the
system.
MaxxBass
®does not change the artist's sound mix.
MaxxBass
®uses a patented digital signal processing algorithm to
calculate precise harmonic content information which is added back
into the LPF signal.The combined LPF and harmonics output is high
pass filtered, thus removing the original bass signal.The processed
signal is then added back into the original HPF signal and the final
output provides a signal that sounds like the original, but no longer
has un-reproducible low frequencies.

MAXXBASS
SIGNAL FLOW
FEATURES
Selectable
MaxxBass
®Frequency Setting of 60Hz and 80Hz
Green LED clip/Red LED power indicator signal
Gold 2 Channel in/2 channel buffered full-range out RCA
connectors
4-pin locking power plug
Input connector for outboard
MaxxBass
®Intensity controller
Remote and on-box intensity controls
Intensity adjustment from 0 to full effect
-18dB/octave high pass filter output at 60/80Hz
Defeatable -24/dB octave low pass filter at 100Hz on the input
Input Cross-
Over
60/80 Hz
HPF Output
HPF
LPF
LPF +
Harmonics
+
MAXXBASS®
Harmonics HPF
60/80 Hz
Input Signal Example
Processed Signal Example
6

SPECIFICATIONS
Frequency 20hz-20kHz
Signal-to-Noise Ratio >85dB
Separation 65dB @ 1kHz
Crossover Slope 24dB/octave
Input Impedance 20,000 Ohms
Input Sensitivity variable, 300mV to 3V peak to peak
Output Level variable, 300mV to 5V peak to peak
Supply Voltage 9 to 16 VDC
INSTALLATION/MOUNTING
NOTE: As an option, before beginning, disconnect the
negative (-) terminal of the battery to prevent an
electrical short to ground. Reconnect the negative
terminal only after all connections have been made.
To prevent damage to the
MaxxBass
®Processor while driving,
mount in a secure place. Choosing the appropriate location will
depend upon your vehicle and the complexity of your system design.
Typical mounting locations include the trunk and passenger
compartment (floor or under seat). Never mount the
MaxxBass
®
Processor in a location that would subject it to immersion or
exposure to water.
Once a location has been chosen, securely mount the
MaxxBass
®
Processor with the four mounting screws. Be Careful! Inspect the
area underneath to be sure you are not drilling into wires, brake or
fuel lines, etc. that could be damaged by the drill bits or screws.
7

MASSBASS
OUTLINE AND DIMENSIONS
MINMAX
INTENSITY
MINMAX
OUTPUT INPUT
MINMAX
80Hz
60Hz
ON
OFF
FREQUENCY CROSS OVER
INPUT OUTPUT POWER REMOTE
GND REM +12V REM OUT
(11.5 cm ) (6.3 cm )
(14 cm )
(3 cm )
1.18 in
2.48 in4.53 in
5.51 in
(15 cm )
5.90 in
POW ER CLIP
8

WIRING CONFIGURATIONS
The
MaxxBass
®Processor is recommended in two different
configurations.
1. Front Stereo Configuration
The figure below illustrates the wiring for a front stereo
configuration. One
MaxxBass
®Processor is used between the front
channel source and front speaker amplifier to increase the bass
response only on the front speakers.
Implementing
MaxxBass
®on the front speakers will increase the
perceived bass response of these speakers down to 30-40Hz
providing a Virtual Subwoofer. The listener will achieve better bass
balance and imaging with a rear mounted subwoofer or trunk
mounted speakers with sufficient bass response.
Front speakers
with Virtual
Subwoofer
TM
Subwoofer
Front Rear
Maxx
Bass
®
In-dash
CD Receiver
Power
Amplifiers
LR
LF
RR
RF
9
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