it" sunday , birds are singing . and i don't want any fight with you arnaud so i excuse me i was rude in my previous posts , it"s just hifi anyway . yes vincent gis a brilliant engineer and the magic of his dac despite of the excellent naked vishay resistors implementation reside in his FPGA decoding / buffering and filtering secrets. i only regret that with the success he stop the offers of TOtalDaC A1 and the A1 DAC card alone . at 1800 euro it was a very nice offer for DIyers like me to build a ultimate R2R dac . on the other side the AN dacs ( DAC 4.1 kit ) in my case . offer the opportunity to build a very good R2R dac with a full tube rectified and regulated power supply and with different transformer level for I/R conversion and tube output stage . i must admit that the simpler CS8414 receiver on the AN digital board can compete with the modern FPGA of the Total dac. different approach for both company but at the end very good analog sound for both .. PS i'm french too and i like when french company succeed like Totaldac or Devialet but it doesn't mean i can't criticize them..