Used Denon DN-X1500S 4-channel DJ mixer.  Tested and everything works well.  

This mixer is a must-have for any aspiring or professional DJ. With its high-quality
sound and versatile features, this mixer is perfect for mixing and blending tracks seamlessly. Made in Japan, this mixer
is built to last and can withstand hours of use in any setting. Whether you're a beginner or an experienced DJ, the
Denon DN-X1500S has everything you need to create an unforgettable performance. This mixer is compatible with a
wide variety of music sources, and its four channels allow for maximum flexibility. So if you're looking for a reliable and
top-quality DJ mixer, the Denon DN-X1500S is the perfect choice for you.