Peavey XD 3/4 Stereo/Mono Crossover is a professional audio device designed to divide an audio signal into three or four separate frequency bands, allowing for precise control over the sound reproduction of a sound system. It features two independent third-order state variable filters with 18 dB per octave roll-off, providing accurate and reliable frequency separation. The XD 3/4 offers a wide range of adjustable crossover frequencies, enabling users to tailor the sound to their specific needs and preferences.

The XD 3/4's comprehensive feature set includes individual level controls for each bandpass, allowing for precise balancing of the output levels. It also incorporates a 40 Hz roll-off switch and LED indicator, providing additional flexibility in managing low-end frequencies. The unit's stereo/mono switch allows for versatile operation in both stereo and mono modes, making it suitable for various applications.