Maxxsonics Musical Instrument Amplifier MBC1 User Manual

MAXXSONICS  
BASS CREATOR  
DIGITAL BASS RESTORATION  
MBC1  
 
MBC1 SPECIFICATIONS  
Maximum Input Level.............................................................................................15V rms  
Maximum Output Level......................................................................................13.5V peak  
Frequency Response......................................................................10Hz - 100KHz; +/-1dB  
Total Harmonic Distortion.........................................................................................0.003%  
Signal to Noise Ratio.................................................................................................130dB  
Balanced Input Noise Rejection.................................................................................>60dB  
Input Impedance.....................................................................................................10 Kohm  
Output Impedance................................................................................................150 Ohms  
Power Supply......................................................................................High headroom PWM  
Power Draw...............................................................................................................150mA  
Recommend fuse rating..............................................................................................1 Amp  
MBC1 FEATURES  
Bass Driver: The MBC1 contains a Bass Driver circuit that accurately recreates and injects  
Low Frequency information back into the signal path. What that means in everyday terms is  
that the MBC1 will give more bass impact to your best compact discs or lowest quality  
recordings.  
Bass Equalization Circuit: The MBC1 has a unique equalization circuit that contours the  
restored bass to your speaker systems.  
Dash Mount Remote Control: The MBC1 comes with a Dash Mountable Remote Control  
that allows you to enjoy the effects of the MBC1 without having to leave the drivers seat. The  
Dash mount Control has an LED indicator that will grow brighter as you add more bass or  
dimmer when you decrease it.  
Bass Maxximizer Indicator: Not only does the MBC1 provide good music to your ears, but it  
also gives you some visual enjoyment as well. On the chassis of the MBC1 there are three  
LED indicators that flash when the bass maxximization circuit is activated.  
Bass Output Control: The MBC1 has the ability to produce large amounts of deep, ear  
blowing bass without damaging your speakers. The Bass Output Control circuit allow the  
MBC1 to maxximize the bass output of any autosound audio system while restraining  
destructive bursts.  
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MBC1 DRAWING  
T H E  
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CENTER FREQUENCY: This knob allows you to select the frequency you want the MBC1  
bass restoration circuit to maxximize.  
FREQUENCY RANGE: This knob allows for you to adjust the range of frequencies from your  
center point. All the way to the left will include the maxximum frequencies to maxximize, while  
all the way to the right will enhance only a limited amount f frequencies near your CENTER  
FREQUENCY.  
OUTPUT LEVEL CONTROL: This knob allows for you to control the amount of signal voltage  
you are sending through the RCA OUTPUTS to your amplifier(s). It is important to note that the  
MBC1 has a built in line driver capable of sending an ultra clean’ 9 volts of signal output to  
your amplifier(s). Be sure to reference the end panel silk screening for GAIN/LEVEL  
CONTROL on your amplifier(s). Some amplifiers cannot handle the full 9 volts and going  
beyond the specified Input range on your amplifier(s) can be damaging.  
GROUND ISOLATION: Occasionally alternator whine may appear in the system because the  
source unit and amplifier may use different grounds. To help in this situation, we have provided  
alternative grounding options. MAKE SURE THE SYSTEM IS OFF BEFORE SWITCHING  
THIS SELECTION!  
RCA INPUT: In most cases you will leave the selection switch in the BALANCED position. In  
some systems the source unit may look for a ground through the RCA connections. In this  
event you would switch the selection to UNBALANCED.  
INPUT: RCA’s from source unit connect to this location.  
OUTPUT: RCA’s from the MBC1 connect to the inputs of your amplifier(s).  
REMOTE: The BPR-1 Bass Processor Remote dash mount control connects here. This  
remote allows for complete control of your audible subwoofer level along with a LED indicator  
which brightens as you increase bass enhancement.  
REM / 12V / GND:  
-REM: Connects to a 12V+ switched source. The REM cable should have 12V when the  
source unit is on and 0V when the source unit is off. Typically this would connect to  
the Power Antenna’ output wire on the back of your source units’ wiring harness.  
-12V: Connects to a 12V constant source. The Positive battery terminal is recommended and a  
1 amp in-line fuse is required.  
-GND: Connects to a ground location. Be sure that all paint is removed from the area of this  
connection on the vehicle chassis.  
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MBC1 WIRING DIAGRAM  
Source Unit  
OUTPUT LEVEL  
CONTROL  
4.5V  
7V  
2.5V  
FREQUENCY  
RANGE  
CENTER  
FREQUENCY  
9V  
.2V  
GROUND  
ISOLATION  
WIDE NARROW  
GROUND  
200-Ohms  
ISOLATED  
R
BASS CREATOR  
DIGITAL BASS RESTORATION  
MBC1  
RCA  
INPUT  
BALANCED UNBALANCED  
INPUT  
OUTPUT  
R
L
R
L
REMOTE  
REM / 12V / GND  
Amplifier  
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TROUBLESHOOTING A SYSTEM  
The key to finding the problem in a troubled sound system is to isolate parts of that system in a logical fashion to track down the  
fault.  
The diagnosticsystemwillnotshutdownthe MBC1orthe amplifier(s), althoughthe amplifier(s)ownprotectioncircuitrymayshut  
the amplifier(s) down should a fault status occur. At which time you will need to consult the owners manual for that particular  
amplifier.  
Lowoutputpower  
1-Checkthatlevelcontrols havebeensetupproperly.  
2 - Make sure that the battery voltage, as measured at the amplifier(s) and MBC1 +12 volt and ground terminals, is 11 volts or  
more.  
3-Checkall+12voltandgroundconnections.  
Fuses blowing  
1-Insurethatthevoltagetotheunitdoes notexceed15volts.  
2-A shortonthemain+12voltcablefromthebatterytothevehiclechassis willcausethemainfusetoblow.  
3-IftheMBC1 is blowingfuses continuallywithonly+12volt,groundandremoteleads connected,theunitmaybefaulty.  
Systemdoes notturnon  
1-Checkallfuses.  
2-Checkallconnections.  
3-Measure the +12voltandremote turnonvoltages atthe amplifier(s)andMBC1terminals. Ifthese are nonexistentorlow, take  
voltagemeasurements atfuseholders,distributionblocks,theheadunits +12voltandremoteleads tolocalize theproblem.  
Noiseproblems  
Systemnoisecanbedividedintotwocategories,hiss,andelectricalinterference.  
Hiss,orwhitenoise  
1 - High levels of white noise usually occur when level controls are turned up too high - reduce the levels until the noise is no  
longerpresent.  
2 -Another major problem that can cause excessive hiss, is a noisy head unit - unplug the MBC1 Input RCAs, and if the hiss level  
reduces,thesourceunitis atfault.  
Electricalinterference  
The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition  
system, alternator, fuel pumps, air conditioners, to mention just a few, create radiated electrical fields, as well as noise on the +12  
voltsupplyandground.Totryandeliminatethis noise,runawirefromtheradiogroundwiretothegroundinputontheMBC1.  
A tickingorwhinethatchanges withengineRPM:  
1-This problemcouldbecausedbyradiationpickupofRCAcables thataretooclosetoafuelpumporadistributor.  
2-Checkthattheheadunitgroundis connectedstraighttothevehiclechassis, anddoes notusefactorywiringforground.  
3 - Try to supply the head unit with a clean +12 volt supply directly from the battery +, instead of using a supply from the in dash  
wiring/fusebox.  
Aconstant whine:  
This type of noise can be more difficult to pinpoint, but is usually caused by some kind of instability, causing oscillations in the  
system.  
1-Checkallconnections,especiallyforgoodgrounds.  
2-Makesurethatnospeakerleads areshortingtoexposedmetalonthevehiclechassis.  
3-RCAcables arenotorious fortheirproblematicnature,socheckthatthesearegood,inparticulartheshieldconnections.  
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Maxxsonics Limited Warranty  
As the manufacturer of Maxxsonics, MB Quart, Hifonics, Crunch and Autotek car audio  
products, Maxxsonics USA Inc. Warrants to the original consumer purchaser the amplifier  
to be free from defects in material and workmanship for one (1) Year from date of purchase.  
All other parts and accessories of the system are warrantied to be free from defects in  
material and workmanship for one (1) year from date of purchase. Maxxsonics will repair  
or replace at it’s option and free of charge during the warranty period, any system  
component that proves defective in materials and workmanship under normal installation,  
use and service provided that the product is returned to the authorized Maxxsonics dealer  
from where it was purchased. A photo copy of the original receipt must accompany the  
product being returned.  
Valid purchase receipts will contain the name and address of the authorized reseller.  
Any damage to the product as a result of misuse, abuse, accident, incorrect wiring,  
improper installation, alteration of date code or bar code labels, revolution, natural  
disaster, or any sneaky stuff because someone messed up, repair or alteration out side of  
our factory or authorized service centers and any thing else you have done that you should  
not have done is not covered.  
This warranty is limited to defective parts and specifically excludes any incidental or  
consequential damages connected therewith. This warranty is not to be construed as an  
insurance policy.  
Warranty on installation labor, removal, re-installation and freight charges are not the  
responsibility of Maxxsonics USA Inc.  
Warranty products damaged as a result of insufficient or improper packing materials are  
not covered by this limited warranty and such damaged product will be returned “as is”  
at the expense of the owner.  
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PART # F811  
 

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