SUB-1STR Single DC 12-24V Active Low Pass Filter Crossover Subwoofer DIY KIT - Motronix
Tuning your subs
What Should I Set My Low Pass Filter To?
Do subwoofer take away the low frequency from main speakers? | Audio Science Review (ASR) Forum
Tuning your subs
What Should I Set My Low Pass Filter To?
Can someone please explain what low pass is on my sub woofer and why I'd want it high or low? : r/audiophile
Low Pass Filter Vs High Pass Filter for a Subwoofer - BoomSpeaker
What are the frequency settings for a subwoofer? I have a subwoofer with 4 different frequency settings. I need powerful, punchy bass. Should the setting be positive or negative? - Quora