The 840C embraces a raft of proprietary technologies including ATF™ (Adaptive Time Filtering) asynchronous up-sampling technology which has been developed in conjunction with Anagram Technologies of Switzerland. This system intelligently interpolates 16-bit/44.1kHz CD data to 24-bit/384kHz data, through the use of a 32-bit Analog Devices Black Fin DSP (digital signal processor). This in turn feeds two 24-bit/384kHz DACs from the same company in dual differential formation.
Excellent condition, both cosmetically and operationally. Original everything! Black finish. $750 firm plus shipping.