Symphony I/O Mk II Specifications

Highlights:

• Best AD/DA conversion of any Thunderbolt audio interface
• Up to 32 channels of modular analog I/O with optional 8 mic preamps
• Best per-channel value of any interface in its category
• Choice of Thunderbolt, Pro Tools HD (Mac/PC) or Waves SoundGrid connectivity
• Ultra-low latency performance
• Intuitive touchscreen display and front panel control
• Designed in California, Built in the U.S.A.

Analog to Digital:

• THD+N: -115dB @ 22dBu (0.00020%) unweighted
• Dynamic range: 122dB A weighted
• Maximum input levels:
  • +4dB setting: +24dBu
  • -10dB setting: +6dBV
• Frequency response at 44.1kHz: 1-20,000 Hz (+/- 0.05dB)
• Input impedance: 10K

Digital to Analog:

• THD+N: -119dB @ 21dBu (0.00014%) unweighted
• Dynamic Range: 126dB A weighted
• Max output levels – ∞ to +24dBu
• Frequency response at 44.1 kHz: dc to 20kHz (+/- 0.05dB)
• Output impedance: 50 Ohm
• Outputs are balanced through Apogee’s proprietary Perfect Symmetry Circuitry (PSC)

Headphone Output:

• 1 stereo 1/4″ headphone output on front panel
• THD+N:
  • -110dB @19dBu into 600 Ohm (=80mW)
  • -101dB @14dBu into 32 Ohm (=470mW)
• Dynamic Range: 121db A weighted
• Output: Apogee’s proprietary Constant Current Drive™ provides smooth frequency response with any headphones