The AO4S-192 from RME is an analog expansion board that adds 4 professional quality analog outputs to the company's HDSPe AIO PCIe card. Level adjustment, balanced circuit design, 118dBA signal to noise ratio, and the highest level of PC-noise suppression guarantee perfect sound quality.

The converters offer the same performance as the on-board stereo analog I/O of the HDSPe AIO - up to 192 kHz resolution, balanced connection, and the choice of 3 different reference levels, selected in the settings dialog.

The expansion board can be used with the HDSPe AIO and the HDSP 9632 to provide a maximum of 6 channels of audio output when combined with the 2 channels of I/O available on the main board. However, no more than one AO4S-192 AIO can be connected to each card, although a combination of an input and output card is possible.