To Hans Wetzel,
Thanks for a very nicely written review of the Devialet 120.
I have some input to your comment on the treble. The class-A and class-D output stages work in parallel. To avoid the switching noise normally associated with class-D and skip the low-pass filter often used, if I understand this correctly, the class-A section has a DSP controlled “correction” output that cancels high-frequency noise from the class-D stage. Very neat.
I own a D-Premier and have used many firmware revisions. The correction output is clearly a real balancing act for Devialet developers. Some firmware versions have more “lively” treble while others can seem to control too much. The current version 7.1 is marginally on the controlled side. For example, the early version 6.xx was quite bright in my opinion.
Hi Olav, thanks for reading. It's interesting to hear that you've heard differences in the D-Premier's treble response with various firmware updates. I can't say whether that is a tailoring of sorts on the French company's part, or whether it was an unintentional side effect of some other change they made. All I know is that the treble in the Devialet sounds markedly different from anything else I've heard. I suspect this contributes to the folks out there who say that the Devialet doesn't sound as good at low volumes. With a less "lively" sound than most every other class-AB or class-D amp out there, it may well sound different, but I never found it problematic. As you can tell from my review, firmware version 7.1 worked splendidly during the review period. I wouldn't prefer the treble any other way. . . . Hans Wetzel