Apogee Symphony I/O MK II Chassis Thunderbolt (No Module Included) 233666 805676301525

$ 3,125.00

Apogee Symphony I/O MK II Chassis Thunderbolt (No Module Included) 233666 805676301525

$ 3,125.00
- +
  • SKU: ASYM2233666
  • Brand: Apogee
  • Type: Audio Interfaces
  • Availability: In Stock
Key Features:
  • 2 Input/Output Module Slots
  • Up to 16 Channels I/O per Module
  • Thunderbolt Connectivity
  • Front-Panel Touchscreen w/ TFT Display
  • Multi-Function Control Knob
  • Headphone Output
  • Dynamic Temperature-Controlled Fan
  • Compatible with any Core Audio Software
  • Apogee Maestro Software Available

The Symphony I/O Mk II from Apogee Electronics is an advanced, flexible multi-channel audio interface featuring the newest flagship AD/DA conversion, modular I/O (up to 32 inputs and outputs), and an intuitive touchscreen display. The chassis provides two I/O Module slots for a variety of digital audio conversion options that form the interface side of the Symphony I/O Mk II. The front-panel touch screen offers convenient access to nearly every setting including sample rate, clock source, headphone & speaker output levels, meters for all I/O and section navigation, as well as input levels, digital I/O, and configuration settings.

The rear panel provides access to the two I/O Module slots that are capable of a combined thirty-two channels of input and output, while the two Thunderbolt connectors ensure compatibility with newer Mac computers. Also included are Wordclock I/O connectors & termination, an option card slot, and a quiet digitally-controlled fan to keep everything running cool.

The Symphony I/O Mk II features a single ultra-high-fidelity DAC and headphone amplifier with Apogee's Constant Current Drive technology, which was first introduced in the Apogee Groove. The headphone amplifier dynamically compensates for non-linearities of any connected headphones, providing massive power while maintaining extremely low distortion and linear frequency response.

The optional five I/O Modules allow the user to choose from standard configurations, or customize the following – channel count, analog to digital input, digital to analog output, microphone preamps (requires an analog card), and digital I/O.

  • Legendary AD/DA conversion
  • Up to 32 channels of modular analog I/O with optional 8 mic preamps
  • Ultra-low latency performance
  • Intuitive touchscreen display and front panel control
  • Option card slot for future platform flexibility
  • Dynamic Temperature Control
  • Designed in California, built in the U.S.A.


  • ADC THD+N: -114 dB @ 22 dBu (0.00020%)
  • Dynamic Range: 122 dB (A weighted)
  • Maximum Input Levels:
  • +4 dB Setting: +24 dBu
  • -10dB Setting: +6 dBV
  • Frequency Response at 44.1 kHz: 1 Hz to 20 kHz (±0.05 dB)
  • Input impedance: 10 kOhms
  • DAC THD+N: -117 dB @ 21 dBu (0.00014%)
  • Dynamic Range: 129 dB (A weighted)
  • Max Output Levels: -∞ to +24 dBu
  • Frequency Response at 44.1 kHz: DC to 20 kHz (±0.05 dB)
  • Output Impedance: 25 Ohms
  • Outputs are balanced through Apogee's proprietary Perfect Symmetry Circuitry (PSC)
  • Headphone Stereo Headphone Output (Front Panel): 1/4" / 6.35 mm
  • THD+N:
  • -110 dB @ 19 dBu into 600 Ohm (=80 mW)
  • -101 dB @ 14 dBu into 32 Ohm (=470 mW)
  • Dynamic Range: 121 dB (A weighted)
  • Output: Apogee's proprietary Constant Current Drive provides smooth frequency response with any headphones
  • System Requirements Computer: Thunderbolt-equipped Mac
  • Memory: 4 GB RAM minimum, 8 GB RAM recommended
  • OS X 10.9.5 or greater
  • Thunderbolt cable (sold separately)

In the Box

  • Apogee Electronics Symphony I/O Mk II Chassis (Thunderbolt)
  • AC Power Cable
  • Rack Ears and Bolts
  • Limited 1-Year Warranty
  • Data Cables (Not Included)
MPN: 233666 UPC: 805676301525
Customer Reviews