The Mackie Onyx24 is a premium 24-channel analog mixer that serves as a comprehensive centerpiece for professional recording studios, live sound reinforcement, and complex audio production environments. It is built around Mackie's acclaimed Onyx microphone preamplifiers, which are discrete, high-headroom designs renowned for their ultra-low noise floor and transparent, detailed sound, making them ideal for capturing pristine recordings of vocals, acoustic instruments, and full drum kits. The mixer offers a versatile input section with a combination of combo XLR/TRS jacks for microphones and line-level sources, dedicated stereo line inputs, and tape returns, providing ample connectivity for large-scale sessions. Each mono channel is equipped with a 3-band semi-parametric equalizer featuring a sweepable mid-frequency control, allowing for precise tonal shaping critical during both tracking and live mixing.

A defining feature of the Onyx24 is its integrated multi-channel USB audio interface capability. It can stream all 24 input channels simultaneously to a connected computer at resolutions up to 24-bit/192kHz, enabling true multi-track recording where every source is captured to a discrete track within a Digital Audio Workstation (DAW). This provides immense post-production flexibility, as each element of a live performance or studio session can be edited, processed, and mixed independently after the fact. The USB connection also facilitates the return of stereo audio from the computer for monitoring through the mixer's main outputs or control room feeds, seamlessly integrating the analog mixing workflow with modern digital audio production.

Constructed with a robust steel chassis, the mixer features 60mm long-throw faders for precise level adjustment, four subgroup outputs for bus processing, and comprehensive routing options including direct outputs for each mono channel. It includes multiple aux sends for monitor mixes and effects, a dedicated talkback section with microphone input, and robust headphone amplification. With its combination of pristine analog preamps, flexible routing, and high-resolution multi-track USB recording, the Mackie Onyx24 delivers the tactile control and sonic integrity of a professional analog console alongside the seamless integration required for modern computer-based production, making it an ideal hub for demanding project studios, mobile recording rigs, and high-end live sound applications.