Apogee Symphony I/O USB Audio Interface Chassis Only

Apogee Symphony I/O USB Audio Interface Chassis Only

Apogee Symphony I/O Mk I Chassis Only – Key Features

The Apogee Symphony I/O Mk I is a modular, high-end multi-channel audio interface chassis designed as the foundation of a professional studio conversion system. The “Chassis Only” version includes the empty main unit (no I/O modules installed), allowing users to customize it with compatible Mk I modules.

Core Features

•  Modular design — Two expansion slots for I/O modules, supporting up to 32 channels of simultaneous analog and/or digital I/O per chassis. 

•  Flagship Apogee AD/DA conversion — High-performance analog-to-digital and digital-to-analog conversion with ultra-low latency.

•  Audio Interface Mode (AIM) technology — Flexible connectivity options selectable via front panel or software:

•  Symphony mode (via Symphony 64 PCIe or Thunderbridge)

•  Pro Tools HD / HDX mode (direct connection via PC-32 / DigiLink)

•  USB Audio mode (direct connection to Mac)

•  Standalone mode (A/D–D/A converter without computer) 

•  Optional world-class microphone preamps — Compatible with the 8-channel Mic Pre module (installs in Slot 2) when paired with suitable line-level modules.

•  Apogee Maestro software control — Full parameter control, routing, metering, Soft Limit, UV22HR dither, and monitoring features.

•  Front-panel monitoring and control:

•  16 × 10-segment LED meters

•  2 multi-function encoder knobs

•  OLED GUI display (sample rate, clock source, meter source, function selection)

•  2 independent ¼″ headphone outputs

•  Professional clocking — Word Clock I/O + LoopSync I/O with termination switch; Direct Digital Synthesis (DDS) clocking technology.

•  Quiet, temperature-controlled cooling fan.

•  Rackmountable — Includes removable rack ears for standard 19″ racks.

•  Power — Universal AC input (90–240 VAC, 50–60 Hz, approx. 150 W).

Connectivity (Chassis Rear Panel)

•  2 × Symphony PC-32 ports (for Symphony 64 PCIe / Pro Tools core cards; also supports daisy-chaining)

•  USB 2.0 Type-B port

•  Ethernet port (for future expansion / control)

•  Word Clock In/Out (BNC)

•  LoopSync In/Out (BNC)

•  Word Clock termination switch

Compatible I/O Modules (Mk I only)

Note: Mk II / SE modules are not compatible with the original Mk I chassis.

•  8×8 Analog I/O + 8×8 AES or Optical

•  16×16 Analog I/O

•  2×6 Analog + AES/Optical

•  16 Analog In + 16 Digital Out

•  16 Analog Out + 16 Digital In

•  8-channel Mic Pre module (pairs with 8×8 or 16×16 modules)

Typical Performance Highlights (with modules)

•  A/D: THD+N ≈ –113 dB, Dynamic Range ≈ 120 dB (A-weighted)

•  D/A: THD+N ≈ –117 dB, Dynamic Range ≈ 129 dB (A-weighted)

•  Headphone outputs: High-quality, independently assignable

Summary

The Symphony I/O Mk I Chassis Only provides a future-proof, modular foundation for building a custom high-resolution audio interface or standalone converter system. It delivers Apogee’s renowned conversion quality, flexible host connectivity, and expandability up to 32 channels, making it suitable for professional recording, mixing, and mastering studios.