In an car audio system, the role of an car subwoofer is to purely focus on playing bass only. The large cone area from an subwoofer being an 10 12 or 15 inch speaker gives it capability to push some deep bass into your trunk. If you notice your car subwoofer is playing bass and also you can hear treble from it, the low pass filter is not switched on or not setup correctly. When this happens, the car subwoofer will not play its best, you will notice an reduction in sound quality and loudness.
There are two types of filters used in car audio for two different instances. The high pass filter is designed for car amplifiers that are powering either your front or rear speakers. People tend to setup the high pass filter to 80HZ to prevent the car speakers in the doors playing bass. This allows your car door speakers to play more clean reducing the amount of distortion created. An low pass filter should be setup to 80 or 60HZ depending your listening tastes. This should only be switched on the bass amplifier that is powering your car subwoofer. This will stop vocals playing out from your car subwoofer, as frequencies below the cut off point are so low to an point treble is muted out.
To only get bass from an car subwoofer and to stop vocals coming out of it, simply switch on the 'LPF' to the on position, this switch will be found on your car amp. Most car amps either that are entry level or high end from big brands such as alpine or pioneer, will have an adjustable crossover switch with that label. There also usually will be an adjustable dial that you can turn using an screwdriver that allows you to set the low pass filter frequency. Ideally, you want to set it at 80 Hz or below. Play an favourite song that has alot of bass and adjust the screw for the low pass filter frequency to how you like your bass to sound. There is no perfect point with this one, as some people prefer louder boomier bass and some car audio listeners like that deep low end rumble like an earthquake.
You also may notice that your aftermarket car headunit will also have an separate low pass filter found within the audio settings on the unit. This is also good to have, however if you have enabled it on the car amplifier you can select this to the off option.This is because having two low pass filters switched on at the same time will impact sound quality and we recommend that you let the do car amplifier the work. The low pass filter only an headunit will only work if switched on and if the RCA cables are connected to the 'SUB OUT' RCA plugs on the back of the car stereo.
0 Comments: