The dbx ZonePro 641m Digital Zone Processor is a 6-channel multi-effects processor designed for professional audio applications. With a maximum sampling rate of 48kHz, this rack-mountable unit offers a variety of effects including parametric equalization, compression, and delay. The ZonePro 641m features RCA input/output ports, making it easy to integrate into existing audio setups. Its compact 1U rack unit height allows for efficient use of space in sound systems, while its digital design ensures high-quality audio processing. Ideal for musicians, sound engineers, and producers looking to enhance their audio mix. I am unable to test this product. Maybe from a smoking environment.