Upgrade your studio with this used Universal Audio Apollo Quad Audio Interface in good condition, offering superior analog sound and powerful real-time UAD processing. Featuring four SHARC DSP processors, it lets you run UAD plug-ins with near-zero latency. Equipped with Thunderbolt connectivity (cable not included), the Apollo Quad offers premium conversion with 24-bit/192 kHz audio resolution, along with 4 analog inputs, 8 line outputs, and 2 digitally controlled mic preamps. The unit shows light signs of use but functions perfectly, making it a reliable choice for producers, engineers, and musicians looking for professional-grade performance at a great value.