MaxxBass®
TABLE OF CONTENTS Congratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Why Use MaxxBass® . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Why is MaxxBass® Better . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 What is MaxxBass® . . . .
CONGRATULATIONS Thank you for choosing PrecisionPowerTM audio equipment. At PrecisionPowerTM 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 PrecisionPowerTM product reflects our commitment to offer you unparalleled versatility and quality for years of dependable service and listening enjoyment.
WHY USE MAXXBASS PrecisionPowerTM 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.
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.
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 45.25" woofer drivers.
MAXXBASS SIGNAL FLOW Input CrossOver 60/80 Hz HPF + Output LPF Input Signal Example LPF + Harmonics MAXXBASS® Harmonics HPF 60/80 Hz Processed Signal Example 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 effec
SPECIFICATIONS Frequency Signal-to-Noise Ratio Separation Crossover Slope Input Impedance Input Sensitivity Output Level Supply Voltage 20hz-20kHz >85dB 65dB @ 1kHz 24dB/octave 20,000 Ohms variable, 300mV to 3V peak to peak variable, 300mV to 5V peak to peak 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.
MASSBASS OUTLINE AND DIMENSIONS 5.90 in (15 cm ) 5.51 in (14 cm ) IN TEN SITY O U TPU T PO W ER M IN M AX IN PU T CLIP M IN M AX M IN M AX 4.53 in 2.48 in (11.5 cm ) (6.3 cm ) 80H z ON 60H z O FF FR EQ U EN C Y G N D R EM C R O SS O VER +12V R EM O U T 1.
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.
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. The units should be wired between the in-dash CD Receiver and the power amplifiers as shown below.
The ground wire should be of the same gauge wire as the power wire. As a rule of thumb, use as short length of wire as possible. Find a location near the MaxxBass® Processor that is metal ( the floor is ideal) and clean an area about the size of a quarter to bare metal. Drill a pilot hole in the middle of this area. Terminate the wire with a ring connector and attach it to the bare metal using a #8 sheet metal screw and washer (not supplied). We suggest crimping and/or soldering this connection.
INPUT To use Speaker Level Inputs (common ground head units only), connect RCA plugs to the front or rear speaker leads as shown. NOTE: It is important to connect an input signal to both RCA input jacks if a stereo amplifier is used, otherwise the connected channel receives full range and the disconnected channel will receive only the harmonics. Use a RCA female to dual male “Y” cord if mono input is used.
MAXXBASS PROCESSOR SETTINGS To achieve proper performance it is important to set or tune the settings on the MaxxBass® Processor to the final system. This section recommends initial settings and the users can then further adjust these for optimal listening. 1. CROSSOVER: The CROSSOVER control implements a 24dB/octave low pass filter on the input.
When the Remote INTENSITY control is plugged into the MaxxBass® Processor, the Remote INTENSITY control become active and the INTENSITY control on the MaxxBass® Processor is disabled. This allows the user to install a remote control in a location different than the MaxxBass® Processor and place in a more convenient position for the listener such as underneath the dashboard or in the glove compartment.
SOUND IN ONE CHANNEL ONLY Reverse left and right RCA outputs for one band (i.e.-subwoofers) SOUND IS NOW IN OPPOSITE CHANNEL Reverse RCA inputs SAME CHANNEL Problem is in the amplifier, Speakers, or associated wiring of the silent channel. SOUND IS NOW IN OPPOSITE CHANNEL Reverse RCAs to head unit (Check Balance Control) SAME CHANNEL Problem is in the Crossover. See your local Authorized PrecisionPowerTM dealer. SOUND IS NOW IN OPPOSITE CHANNEL Problem is in the head unit.
LIMITED TWO YEAR CONSUMER WARRANTY: Directed Electronics, Inc. promises to the original purchaser, to replace this product should it prove to be defective in workmanship or material under normal use, for a period of two years from the date of purchase by the dealer as indicated by the date code marking of the product PROVIDED the product was installed by an authorized Directed dealer.
