Broadcast Devices LPF-100 Composite Low Pass FilterThe LPF 100 Composite Low Pass Filter is a modern approach to filtering FM composite base band stereo audio. The LPF 100 offers at least 15 dB of noise reduction at 67 KHz and more than 30 dB of attenuation at 100 KHz. Distortion generated by aggressive processing techniques, noisy STLs and stereo generator birdies can now be suppressed effectively without materially impairing stereo performance. The LPF 100 is a tenth order, linear phase filter