Used and in great condition, the Universal Audio Apollo X4 Heritage Edition audio interface delivers elite-class A/D and D/A conversion with QUAD Core real-time UAD processing, making it a favorite among professional music producers and engineers. Featuring four Unison-enabled mic preamps, two Hi-Z instrument inputs, and Thunderbolt 3 connectivity, this desktop interface offers pristine sound and ultra-low latency performance. Compatible with both Mac and Windows systems, the Apollo X4 provides up to 127 dB dynamic range and real-time analog emulation via included UAD plug-ins. Ideal for studio-quality recording, mixing, and mastering on the go or in your home setup, this unit is lightly used and fully tested to ensure top performance.