Fender SPL PCN4 is a professional stereo 3-way active crossover network which may also be used as a mono 4-way unit. It uses a unique, and highly accurate, 24dB per octave Linkwitz-Riley filter system. Additionally, the SPL-PCN4 is one of only a few units that provides flat summed response of the low and high frequency outputs, regardless of the crossover frequency chosen.

The SPL-PCN4 has a variety of features that make it a versatile tool for any audio engineer. These features include:

• Mute switches on each band to help with system set up and calibration.
• Phase reverse switches on each band to allow for fine-tuning of the system's response.