Check the listing for details. dbx AFS224 Dual Channel Advanced Feedback Suppression Processor. Color: Black, Condition: Used. Listed at 85.00 USD. The dbx AFS224 Dual Channel Advanced Feedback Suppression Processor is a professional-grade rack-mountable signal processor designed for live performances and recording studios. With a frequency range of 24, this feedback suppression processor offers active feedback reduction and dynamic filtering, ensuring a clean and professional sound for your audio recordings or live events. The dual channels and XLR input/output ports make it versatile for a variety of setups, while the sleek black design and compact 1U rack unit height make it easy to incorporate into your existing gear. Whether you're a musician, sound engineer, or producer, the dbx AFS224 is a reliable and high-quality tool for achieving optimal sound quality.