If you have purchased the correct wiring kit for your car amplifier and it is installed correctly, then you car amplifier will be getting its full potential. Its important the car amplifier wiring kit is the correct gauge size to ensure that your car amp is getting the most power. This is to prevent voltage drop going to the car amplifier, as if this happens the bass performance will be reduced. If you are not happy with the way your car amplifier is sounding, then you may need to tune the settings on the car amplifier. Usually, there will be switches and dials to adjust, but before you make any changes, it is important to understand what they do.
The 'GAIN' is what controls how much input signal is received into the car amplifier. This is often mistaken for an volume knob on car amplifier but it is totally different. The best way to tune the again is to use your ears. Play an song of your choice that has good amount of bass, crank it all the way on the headunit to your desired listening level, just before any distortion can be heard from the door car speakers and slowly turn the gain up and stop until you hear any level of distortion. There are many fancy tools that you could use to tune the car amp gain settings, however they tend to be expensive and no better than tuning it the old school way.
The 'LPF' or 'LOW PASS FILTER' is also an important part of getting your bass to sound good in your car. This is responsible to how deep or boomy your bass sounds, as it cuts of what bass frequencies are being sent to your car subwoofer. Usually, 80 HZ is the recommended setting for an low pass filter option on your bass amp. This is because around this number, this is were bass plays, you could turn the LPF to 60HZ to cut some of the boomyness from your car subwoofer.
The 'BASS BOOST' is often mentioned not to be used when tuning an car audio amplifier. However, i believe it can be used in correct situations. If you have an aftermarket radio, then you don't need to use this feature at all. However, if you are using an factory radio and an lineout converter, then bass boost can often provide an strong signal to your subwoofer. Bass boost on your car amplifier is an preset equaliser setting, often around 50HZ and when you increase this, it will provide more boom and sound to you car subwoofer. Play around with this setting to see if you get an increased amount of output from your car audio system.
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