The INT202/INT203 interfaces are two variants with slightly varying features. They allow to connect any DAC to any computer. And this in a decent way, with the computer slaved to the internally generated clock and with absolute bit transparency. Common to both units is that they handle all standard sampling frequencies between 44.1 and 192 kHz.
The INT202 is a stereo Firewire to AES/EBU (unidirectional) interface with infrared remote control for volume and absolute polarity. It supports dual wire data transfer in 176.4/192 kHz mode for older D/A Converters. The bit transparency of the player software on the computer can be checked with the INT202.
The INT203 is for bidirectional interfacing between AES/EBU and Firewire and also includes an infrared remote control for volume and absolute polarity. The bit transparency of the player software on the computer can be checked. The INT203 can serve as an input to the computer, e.g. to connect an A/D Converter for transferring vinyl records.
Choosing the proper interface model depends on the computer and D/A Converter at hand. And on your preferences. Here are some guidelines:
- You would like to use Firewire or Thunderbolt connections to your computer: Choose the INT202 or INT203.
- Your DAC supports the 176.4 or 192 kHz sampling frequencies with the dual wire scheme only: Choose the INT202.
- You would like to have a volume control feature: Choose the INT202 or INT203.
- You would like to have an input to the computer as well: Choose the INT203.
- You would like to connect the computer via USB: Choose the INT204 described elsewhere.
- You would like to play back DSD files on a standard PCM D/A Converter: Choose the INT204 described elsewhere.