PAC Bass Blockers

If you like it loud, protect your speakers from bass distortion and enjoy cleaner sound with Bass Blockers. Each Bass Blocker handles up to 50 watts RMS with a 6 dB per octave roll-off. You'll find some general guidelines below for matching Bass Blockers to speaker size. For smaller speakers (3-1/2"s, 4"x6"s, 4"s), the 600 Hz Bass Blockers work well with low-powered systems, while the 800 Hz Blockers are a better choice for high-power applications. Speaker Size Cut-off Frequency 6-1/2", 5"x7"/6"x8" — 150 Hz 5", 5-1/4" — 300 Hz 3-1/2", 4", 4"x6" — 600 Hz (low power) 3-1/2", 4", 4"x6" — 800 Hz (high power) These models do not have quick-slide connectors. Cut-off points are at 4 ohms. If you use 8-ohm speakers, the cut-off point is half the listed frequency.