![]() What happens if you wire a subwoofer backwards? In some application where the subwoofer is placed on a wall opposite from the speakers, reversing the subwoofer polarity can yield better in-room low frequency response. ![]() Setting the phase control to 180 degrees reverses the polarity of the subwoofer. The phase control operates over a range of 0 to 180 degrees. What is the difference between 0 and 180 phase? 2) A more difficult-to-hear result of out-of-phase speakers is the loss of the stereo image. Out-of-phase wiring affects all frequencies and diminishes total frequency response equally, but because bass frequencies have such long wavelengths and move so much air, those are the ones you’ll notice most. What happens if speakers are out of phase? ![]() If they were out of phase, he’d hear a double thump. If the sub and main speakers were in phase, he’d hear a single thump when he connected the battery to the wires leading to the sub’s terminals. How do I know if my subwoofer is out of phase? HPF (sometimes referred to as HP) refers to High Pass Frequencies and is used for speakers and tweeters. What is LPF on subwoofer?įor example, LPF (sometimes referred to as LP) refers to Low Pass Frequencies and is used for subwoofers designed to play only the lowest notes. 70% of 43Hz equals 30.1, so you should set the subwoofer’s low pass filter to 30Hz. For example, your speaker’s frequency response goes down to 43Hz. However, you can set the crossover (LPF) between 80 Hz – 120 Hz based on which setting sounds best for your system.ġ20Hz What Should low pass filter be set at for subwoofer?Īs a general rule, the Low-Pass Filter should be set at a value approximately equal to (or below) 70% of your main speaker’s lowest frequency response. What is the recommended crossover frequency for a subwoofer? For THX Certified and non THX Certified home theater systems, 80 Hz is the recommended setting. What frequency should I set my subwoofer? If rear speakers (passive) are added to this system, the settings will change a little bit. Thus, the recommended settings are a HPF (5000 Hz) for the front tweeters, a HPF (80 Hz) for front midrange, a HPF (80 Hz) for rear speakers and 12 dB or 24dB slope. High Pass Filter and Low Pass Filter What is the best HPF setting? The steeper the slope (db/octave) the less your sub will creep into the neighboring frequencies. You usually set the HPF with a steep slope say 24db/octave because you are trying to protect the sub from damage and a 12-18db/octave on the LPF because you want it to kinda “blend” in with your mids.
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