5. TROUBLE SHOOTING TIPS
NO SOUND ( NO OUTPUT )
@ Pls check all connections, cables' rounting, short, voltage at Ref 0.5 & Anno amplifiers
and headunit
@ Pls check fuses ,If it is blown, pls replace with new ones.
@ 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
@ Minimum working impedance is 1 ohm for single Ref 0.5 amplifiers or 2 ohm for linked operation.
Anno minimum working impedance is 1 ohm stereo or 2 ohm mono
@ If Ref 0.5 & Anno amplifiers are shut down due to overheat, they will start up again after
a short cooling period.
Please allow for better airflow and ensure there's no obstruction around the Ref 0.5 & Anno for
thermal protection
@ Ref 0.5 has Low and high voltage protection. Working Voltage is 9V~16V.
Voltage lower than 8.5V or higher than 16V 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
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.
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