What is the recommended LPF setting?
Setting the LPF for 50 Hz is the best complementary setting. This setting means all of the frequencies below 50 Hz are sent to the subwoofer, and frequencies at 100 Hz (one octave above) are fully attenuated.
Low Pass: This controls the crossover point. The crossover is the frequency point where the subwoofer will take over from the other speakers in your system. We always recommend starting with the crossover (Low Pass knob) set to 80Hz, but crossover points can be a personal preference.
The best Hz for bass is between 60-250 Hz, as recommended by professionals. These ranges protect speakers from damage and ensure optimal safety and listening experience for you. Listening to bass at too low a frequency outside of this range can damage hearing.
For subwoofers, select the low-pass filter (LPF) and for speakers (for a system that has a separate subwoofer or speakers to cover the low range frequencies), select the high-pass filter (HPF).
To set LPF filters on your subwoofer amp, an easy way is to disconnect the RCA's to any amplifiers that are not powering your subs. Be sure that all equalizer settings (bass, treble, front/rear, etc) in your head unit or at “0” or flat.
Recommended Starting Points:
Front Midrange - Band-Pass Filter = 80 Hz HPF & 5,000 Hz LPF (12 db or 24 db Slope) Rear Speakers (Passive) - High-Pass Filter = 80 Hz (12 db or 24 db Slope)
To Bring Out the Bass
When you cut high frequencies, it allows the lower frequencies to be more prominent. Remember, a low-pass filter lets the low frequencies pass through the filter better. So if you have an instrument that needs more low end (say, a bass guitar), you can apply an LPF.
If you're using the subwoofer in a stereo or computer system, just set the subwoofer volume so that it sounds the best from the chair you usually sit in to listen. The sound should be neither boomy nor thin. You can also change the subwoofer volume on the fly to suit whatever music or movies you're listening to.
Check out the entire SVS Subwoofer line-up to choose the subwoofer that is best for your TV/movie viewing. The most common crossover frequency recommended (and the THX standard) is 80 Hz. On-wall or Tiny 'satellite' speakers: 150-200 Hz. Small center, surround, bookshelf: 100-120 Hz.
If your subwoofer and speakers are in the same area and pointing in the same direction, you need to set your subwoofer to phase 0. Meanwhile, if your speakers and subwoofer are on opposite sides of the room pointing towards each other, you need to set your subwoofer phase to 180.
What is the aim of LPF?
The Ideal Low Pass Filter
This type of filter attenuates (i.e. sets to zero) all the spatial frequencies above the cut-off frequency and retains without modification all those frequencies less than or equal to the cut-off frequency.
A low-pass filter (LPF) is a type of band setting you'd see on your EQ. It will be positioned all the way to the right on the frequency spectrum of your EQ. When you apply it, it appears as a cut that slopes down to the right. This cuts the frequencies above (to the right) of the low-pass filter.
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