XFIRE AUDIO XFR1200.4 Owner's Manual - Poor Bass Response
Manual is about: XFR series Mobile power amplifiers
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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).