OWNER'S MANUAL

M12 HIGH PERFORMANCE AMPLIFIER

1. FEATURES

2. DESIGN FEATURES

Speaker short circuitry, DC offset, Voltage sensor & thermal protection.

switching devices.

The B2 line up are made to fullfil our philosophy for amplifiers; A variety of applications, highest possible efficiency and great appearance.The B2 amplifiers are designed to produce high power levels even from stock electrical systems. High efficiency is created from updating every stage through the amplifiers' circuit. High speed controller chipsets, efficient power devices, precise thermal management and the best engineering

Thank you for purchasing the B2 M12 amplifier for your car audio system.B2 has through years of dedication introduced our line of competition amplifiers.

are the cornerstones of the B2 amplifier series.

Low Level Input and Output~350 Hz

Input level 0.2V ~6VVariable subsonic filter : 10Hz ~ 50Hz at 24dB/ OctVariable low pass filter : 35Hz ~ 250Hz at 24dB / Oct Variable bass boost : 0 ~ 9 dB at 45 Hz Remote gain controller Fuse rating : 800 AmpsWorking battery voltage : 9V ~ 18V Minimum Impedance : M12 2ch mode: 1 ohm.

M12 bridged mode: 2 ohm. Dimensions ( L x W x H ) : 650 mm x 258 mm x 132 mm

All features are subject to change in the continuing effort to improve the product without notice

9840 WRMS 2 x 4920 WRMS (14,4V,<1% THD)11700 WRMS 2 x 5850 WRMS (16,0V,<1% THD)15000 WRMS

(12,0V,<1% THD)

FEATURES

Frequency response: 20 Hz

B2 M12 output power

2) B2 amplifiers offer an advanced protection circuit for the benefit of the user.

3) The B2 pcb has been designed using a double sided board and features high current mosfet

4) M12 has a 24 dB slope/Oct low pass & subsonic filter.5) M12 offers a wired remote level control which allows easy gain adjustment from the drivers seat. In addition the Better Bass Remote can also be used for optimum adjustment.

2

M12

2 x 7500 WRMS (18,0V,<1% THD)

1) M12 will allow stable operation in 2ch mode @ 4/2/1 ohm impedance.M12 will allow stable operation as a single unit @ impedances down to 2 ohm.

1 ohm stable 2 channel Ultra Class D Mono amplifier

POWER @ 2 OHM POWER @1OHM, NB: 2ch mode only! 6700 WRMS 2 x 3350 WRMS

Connect preamp signal cables from

OUTPUTOutput RCA for signal routing to another ampl i f ie r .

POWER & PROTECTION INDICATOR

Protect LED, RED-lit shows general malfunct ion, faulty connection or thermal protection

GAIN ( 6V ~ 0.2V )Matching the output voltage of the headunit ' s

SUBSONIC FILTER ( 10Hz ~ 50Hz @ 24dB/Oct )Adjusts the subsonic cut off point to el iminate low frequencies.

Var iab le bas s bo o s t f r o m 0 - 9 d B @ 4 5 H z

REMOTE LEVEL CON T R O L P O R TConnect ion o f e x t e r n a l l e v e l c o n t r o l .

LOW PASS F I L T ER ( 3 5 H z ~ 2 5 0 H z @ 2 4 d B / O c t )Adjus t s the cu t o f f p o i n t f o r t h e l o w p a s s f i l t e r .

PHASE CONTROLVar iab le phase a d j u s t m e n t f r o m 0 - 1 8 0 d e g r e e s .

3. CONTROL & CONNECTION

INPUT BASS BOOST

Power Green, Green-lit shows correct operat ion

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For connection to the positive terminal of the battery (+12). Due to the performance of the M120 gauge cable is required.

Due to the performance of the M12 0 gauge cable

Using the wrong gauge can lead to malfunction.

is required. SPEAKER OUTPUTS

+12V ( POWER CONNECTION ) Minimum speaker cable i s 12 gauge . M12 minimum impedance if used in 2ch mode is 1 ohm.M12

4. INSTALLATIONIf you choose to install the M12 series by yourself, please read the owner's manual carefully. Before you start your installation, please take all steps into consideration. Otherwise, please go to www.b2-audio.com for authorized distributors or contact us directly for support.

4-1. MOUNTING PREPARATIONDisconnect the negative ( ) battery cable before mounting B2 series or making any connections. Check the battery and alternator ground ( ) connections. Make sure they are properly connected and free of corrosion. Before selecting a mounting location for the amplifier, please take cooling and safety into consideration.

B2 amplifiers have been designed with a good heat radiation heatsink to avoid excessive heat from the amplifier circuitry. For optimum heat radiation performance, it is recommended to find a mounting location that allows for vertical installation of the heat sink fins.

any accidentIal damage to the amplifier or the audio system.

M12

For connection to the chassi's ground Connect to switched +12V with trigger from Head Unit

headunit to RCA Input of

GND ( GROUND CONNECTION ) REM (REMOTE CONNECTION )

RCA line-outs to M12 input section.

The ampl i f ie r's connect ion to the loudspe a k e r s .

minimum impedance if used as a single unit is 2 ohm.

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4-1. MOUNTING PREPARATIONFor safety purposes, install the amplifier in a dry and well ventilated location andmake sure no cables or other harness of the car is interfaced with the mounting location or

Before mounting B2 amplifiers, disconnect the negative ( - ) wire from the battery to protect any accidentIal damage to the amplifier or the audio system.B2 series are designed to use 0 AWG power and Ground connection. Connect the power cables to power terminal labeled as + 12V.For the use of external fuses, then connect one end ofthe fuse holder to the power cable and the other end of the fuse holder to positive battery within 20 cm of the same cable.This fuse location will protect the system and the vehicle against the possibility of a short circuitin the power cable. Be sure to use fuses and a fuse holder adequate for the application.

GND ( GROUND CONNECTION )

4-2. +12V, GND, REM CONNECTION

12V ( POWER CONNECTION )

Connect the ground cable to the screw terminal labeled as GND.Run the other end of the cable to the mounting location.to the grounding point. Run one end of the cable to the grounding point.of the vehicle. Connect one end of a short piece of the same size cable as the power cableMake sure the location is clean and provides a direct electrical connection to the frame Locate a secure grounding connection as close to the amplifier as possible.

Connect the remote turn on cable to the power terminal labeled as REM.trigger cable.This may be a toggle switch, a relay, or your source unit's remote trigger cables, or power antenna Run a remote turn on cable from the switched + 12V source.

REM ( REMOTE CONNECTION )

+12V, GND, REM CONNECTION DIAGRAM

Headunit

Remote turn on

Ground

Ground

Ground

will present a hazard to the car's cable, control cables, fuel lines/tanks, hydraulic lines or other components of the vehicle.

Ground

FUSE

FUSE

ESUF EUF S

FUSE

Connect to +

Connect to +

terminal on battery

terminal on battery

Connect to + terminal on battery

200 A

200 A

200 A

200 A

B2 amplifier series recommends 12 AWG speaker connecting cables.

Keep speaker cables away from power cables and B2 series amplifier's input cables. Use grommets anywhere the cables have to pass through the holes in the metal frame or sheet metal. Connect to the speakers according to terminals on each speaker.Strip 3/8" of insulation from the end of each cable and twist the cables strands together tightly.Make sure there are no stray strands that might touch other cables or terminals and cause a short circuit.Crimp spade lugs over the cable ends or tin the ends with solder to provide a secure termination.Connect the cable ends to B2 series amplifiers as show on the speaker system diagram.

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Run 12 AWG speaker connecting cables from your speakers to amplifier's mounting location.

4-3. SPEAKER CONNECTION

M12

2) Connect of Subwoofer 2 terminal to of Subwoofer

8 ~ 2 Ohms

to connect - from subwoofer 1 t0 + subwoofer2

! Caution :

2) Connect of Subwoofer 2 terminal to of Subwoofer

Connect of subwoofer 1)

2 OHM MONO BRIDGED MODE SPEAKER CONNECTION

2) Connect of subwoofer 2 terminal toof subwoofer 1 terminal to

3) Connect of subwoofer 1 terminal to of subwoofer 2 terminal

of subwoofer

SPEAKER CONNECTION DIAGRAM

Use 12 gauge Jumper wire

for bridged mode use only

5. TROUBLE SHOOTING TIPS

NO SOUND ( NO OUTPUT )

@ Pls check whether speakers are functional. You can connect a AA battery to the speaker terminals to see if there is any movement of the speaker cone.

PROTECTION

@ Pls check overload, overheat ( thermal ), short and voltage. DC offset

a short cooling period.

If B2 series amplifiers are functional, then check DC by checking RCA-input L and R When DC is over 4V at input, try by replacing headunit or source unit

DISTORTION

@ Adjust the input level and check the quality of the speakers. Replace low quality speakers with upgraded ones.

POOR BASS RESPONSE

@ Pls check speaker cables and reverse the polarity of one channel

BUZZING SOUND

@ Check the amplifier and the head unit ground and ensure it has a good clean connection @ Check the Rca jack and replace it if faulty or try rerouting it.

WHINING NOISE

@ Engine noise is caused by poor grounding of B2 series amplifiers, headunit, other components, battery or alternator, so pls check all grounding connection.

and headunit. @ Pls check fuses, if it is blown, pls replace with new ones.

@ Pls check all connections, cable's rounting, short & voltage on the M12

@ If the amplifier shuts down due to overheat, it will start up again after

Please allow for better airflow and ensure there's no obstruction around the amplifier for thermal protection. @ The M12 has Low and high voltage protection. Working Voltage is 9V~18V. Voltage lower than 8.5V or higher than 18V will cause the amplifier to go into protect. @ When over 4V DC comes into B2 series amplifiers, then they will be DC protected. Check whether B2 series amplifiers work after removing RCA-Input.

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The M12 www.b2-audio.com

@ Minimum working impedance is 1 ohm for 2ch mode and 2 ohm for brigded operation.