4 mm brushed aluminium front. 2 independent transformers (including one reserved for the line audio). D/A converter: BURR-BROWN PCM1796: – Dynamic: 123 dB. – Distortion rate: 0,0005%. – Signal/Noise ratio: 123 dB. Asynchronous USB-B input can convert PCM up to 192 kHz and DSD64 and 128 (XMOS). USB interface with a specific program designed for ATOLL). Volume attenuation by the converter (from the remote control only). Unbalanced line outputs. 7 regulated power supplies. MKP capacitors in audio link. Output stages with discrete components, without feedback, polarized in class A. Separate digital and line stage power supplies. Specific transformer for digital stages. Controllable with the ATOLL global remote control.