Subsonic Filters

Subsonic Filters & High-Pass Protection

Protect your audio system from over-excursion and amplifier clipping with precision-engineered two-channel inline subsonic filters. Designed to roll off harmful, sub-audible low-end frequencies that drain amplifier power without adding audible value, this collection features our reliable 37 Hz fixed bass blocker cable alongside our flagship PFMOD HP-Sub, which offers selectable high-pass filtering at 20 Hz, 25 Hz, 30 Hz, and 35 Hz.

Whether you need a dedicated fixed cutoff or total versatility across multiple frequencies, these components ensure your subwoofers stay clean, efficient, and protected under heavy loads.

🇺🇸 MADE IN THE USA 🇺🇸