The 650D made CDs and CD-resolution files sound about as good as I've heard them sound here, while its decoding of hi-rez files produced exceptional soundstage width and depth combined with analog-like imaging.
650D DAC and CD Transport
Design features
Proprietary CD drive system mounted on our M-Quattro gel-based 4-point floating suspension.
Separate digital and analog power supplies, each with their own toroidal transformer.
Power supply voltage regulation includes i2 DCf (Independent Inductive DC Filtering); 1 inductor for each and every IC in the audio circuit’s signal path – 18 stages in all.
Four (4) digital inputs (AES/EBU, S/PDIF, TosLink and USB) allowing for a connection to virtually any digital source.
Two (2) digital outputs – AES/EBU and S/PDIF.
Fully compatible with 820S external power supply.
Specifications
Frequency response (full range)
2Hz - 100kHz +0/-3dB
THD @ 1kHz, 0dBFS (A-weighted)
0.0001%
Intermodulation distortion
0.0001%
Dynamic Range
120dB
Signal-to-noise Ratio
120dB @ full output
Channel Separation
116dB
Intrinsic Jitter
1 picosecond RMS
The 650D made CDs and CD-resolution files sound about as good as I've heard them sound here, while its decoding of hi-rez files produced exceptional soundstage width and depth combined with analog-like imaging.