Thunderbolt 3/4 Ready
Finally, you can enjoy all the features and modularity of the Symphony I/O Mk II series while exploiting the massive bandwidth afforded by Thunderbolt 3 technology. With universal USB-C connectors provided by the preinstalled Thunderbolt 3 option card, this interface can be easily integrated into the most modern workflows and is fully compatible with all computer and audio systems using Thunderbolt 3/4 or USB-C connectivity.

Rear Panel Slots
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 / USB-C connectors ensure compatibility with modern Windows and Mac computers. Also included are wordclock I/O connectors and termination, an option-card slot, and a quiet digitally controlled fan to keep everything running cool. 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.

Pristine Conversion
The Symphony I/O Mk II features a single ultrahigh-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 the nonlinearities of any connected headphones, providing massive power while maintaining extremely low distortion and linear frequency response.

UPDATING FROM TB 2 TO TB 3

https://www.youtube.com/watch?v=0_85ZH5jyJw