Hello! Thank you all for this wonderful tread, I think I might bite the bullet and buy the Quattro from the German PC HI-FI SHOP, since I am located in Europe.Would you please give me some advice? My humble AKG K450 with OCC cable upgrade are nothing special, and I would like to use the Quattro as an USB DAC.I currently have the Arcam rPAC, and while splendid for the money, it has poor bass control and tends to be warm.I tried the bigger rDAC and got even more disappointed - even with an upgraded PSU, it just digged depper than the rPAC, that is all, no major change.I am after bags of detail, as rock, metal and eurodance music is often being mastered very compressed and too flat.I have head my speakers with a very expensive CD player, and I will never forget that sound...Out of bookshelf speakers like Monitor Audio BX2, MS AVIANO 2, QUADRAL 330 and PSB B5, I have clearly picked my speakers for their neutral and analogue sound.Do you think the Quattro is a significant upgrade, or should I go even higher? The Yulong D18 has no USB... My system now is :
Speakers : Boston Acoustics A25 with Atlas Hyper 2.0 cables
Amplifier : The legendary HK 6550
DAC : Arcam rPAC + Furutech ADL Formula 2 USB cable + Atlas Hyper Asymmetrical OCC analogue interconnect.