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Dayton Audio 4k-LPF-8 Low Pass Speaker Crossover$32.63
This 2nd order (i.e. 12 dB per octave) low pass Linkwitz-Riley filter from Dayton Audio passes frequencies below the given frequency and can easily be combined with other filters in this series to create 2-way or even 3-way crossover networks. Designed for use with 8 ohm drivers.