The INT204 is housed in a silver anodized aluminum frame.
Two power sources are required for the INT204. One is the bus power fed via the USB connector, the other is an external power supply which is supplied with the INT204 unit. This scheme allows to have the input and output sections of the INT204 galvanically isolated.
The sampling frequency is generated with an internal generator in the INT204. This makes sure the transfer between computer and D/A Converter is low jitter.
A USB type B connector is used a connection to the computer.
There are one XLR socket, one BNC socket and one RCA socket. BNC and RCA sockets are driven by the same driver chip.
Front panel controls
There are eight LEDs for sampling frequency display and power status. A switch allows to select the sampling frequency when doing DSD to PCM conversion (176.4 or 88.2 kHz). Another switch selects the word-length when doing DSD to PCM conversion (24 or 16 Bit). A power switch handles the power on/off for the external power supply input.
Back panel elements from left to right
There is a power inlet for the external power supply, the USB connector, the three output connectors (BNC, RCA, XLR).
The INT204 can do DSD to PCM conversion at selectable sampling frequencies and word-length (88.2 or 176.4 kHz and 16 or 24 Bit). The DSD input is in the DoP format with a sampling frequency of DSD64 (2.8224 MHz) or DSD128 (5.6448 MHz).
Supported PCM sampling frequencies are all standard frequencies between 44.1 kHz and 384 kHz. The sampling frequency of 352.8 kHz is automatically converted to 176.4 kHz and the sampling frequency of 384 kHz is converted to 192 kHz as the AES/EBU or S/PDIF formats do not support sampling frequencies higher than 192 kHz.
Optionally an IR remote control can be purchased to control the audio volume in the digital domain.
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 described elsewhere.
– Your DAC supports the 176.4 kHz or 192 kHz sampling frequencies with the dual wire scheme only: Choose the INT202 described elsewhere.
– You would like to have a volume control feature: Choose the INT202 or INT203 described elsewhere. Or have the INT204 with the IR remote control option.
– You would like to have an input to the computer as well: Choose the INT203 described elsewhere.
– You would like to connect the computer via USB: Choose the INT204.
– You would like to play back DSD files on a standard PCM D/A Converter: Choose the INT204.