Almost all problems can be eliminated by re-checking connections and settings in your system. Follow the steps below
as a guide. If you cannot solve the problem, consult your XFIRE AUDIO installation professional.
NO SOUND - POWER LED IS OFF
1. Check the inline fuse(s) in the positive power cable, replace these if needed.
2. Check the negative power cable connections.
3. Check if the system operating voltage is between 8.5V - 16V DC, our amplifiers have a high and low voltage pro-
tection.
4. Verify source unit operation.
5. Check connection of REMOTE TURN ON wire. If steps 1-4 are OK your amplifier should switch ON and the power
LED should light up.
NO SOUND - POWER LED IS ON
1. Check the RCA cables are properly connected on the source unit and amplifier.
2. Check the RCA cables for damages and replace the cables if needed.
3. Check the speaker cables for damages and if they are connected properly, replace cables if needed.
4. Check if the speakers are damaged and replace if needed.
NO SOUND - PROTECTION LED IS ON
1. The speakers connected have an impedance under the specified load or the speakers/speaker cables have a short
circuit.
2. The amplifier runs really hot, mount the amplifier as recommended in the INSTALLATION section, check the imped-
ance of the speakers and measure if the operating voltage is within 8.5V - 16V DC.
3. Check for DC offset on the RCA inputs, if so check the source unit and RCA cables for damages.
POOR BASS RESPONSE
1. Check if all speakers are connected with the right polarity, speakers connected out of phase will cancel each other
resulting in a poor bass response.
2. Check if the connected speakers/subwoofer(s) are OK, replace if needed.
ENGINE NOISE
1. Use only high quality shielded RCA cables.
2. Ensure that all signal transfer wires (RCA, speaker cables etc.) are kept separately and away from power and
ground wires.
3. Ensure you have only ONE ground connection (star ground) for all your audio components.
4. Ensure that the point of ground is 100% metal which has been sanded free of rust, paint etc.
5. “Optional” Replace the OEM ground cable from the battery with the proper gauge wire (see Power Wiring Selection
Chart).
In case of difficulty
EFX series
LIFE AMPLIFIED
