The Filterless Non-Oversampling technique of the DAC BOX S FL is based on the original format of the Audio CD (16bit and 44.1 kHz) with a maximum transmitted audio frequency of 20kHz. The DAC BOX S FL uses 4 TDA 1543T DA-Chips in parallel operation Dual Differential Mode, ensuring high accuracy and very low distortion in the audible frequency spectrum below 20kHz.

The distortion spectrum below 20kHz is very similar to that of tube amplifiers. The distortion levels increase significantly above 20kHz, which does not affect the playback of Audio CDs, as they are above the audible spectrum. The SMD output is directly connected to the DA-converters for optimal results.

The sound quality is exceptionally good, although the TDA-1543 works better at higher temperatures. Good heatsinks are required for safe operation. However, this particular setup has a special advantage: No additional filtering is required!