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It was actually a spot on response to the review. I own an AVM C9 and I run a pair of Majico speakers with it and I can reassure you that the reviewer was drinking koolaid!
There is poor quality Class D and there is superb Class D. The C9 is remarkable. As far as an insane offering, well let's see, Phono, FM, Full DAC USB 24/192 Async, Excellent CD Player, HT bypass, 325 Watts RMS, Made in Germany at a retail price of $5700!
Modwright state of the art, on which planet or galaxy - are you sure about that?
Jim
But note the truncation of 24-bit audio on the digital input, the high jitter, and the modest measured performance with CD-quality digital sources.
The amplifier section does measure well for a class-D design.
Our sample's USB input operated in isochronous adaptive mode, not asynchronous, and was restricted to 16-bit data and sample rates of 48kHz and below.
Not according to its measured performance.
Modwright uses, IIRC, the Hypex class-D modules, which are excellent.
John Atkinson
Editor, Stereophile
1) The CD section as measured by HI FI Plus was and I quote "top category"
2) The AVM C9 that I own has the USB input asynchronous, 24/192. Excellent.
3) The AVM C9 also uses, IIRC, the Hypex class-D modules, which are indeed excellent.
You did know this?
Jim
Our sample was not excellent.
Our review sample's USB input operated in adaptive mode and was limited to a 48kHz sample rate.
No. But as I said above, the amplifier section of the C9 did measure well for a class-D design.
Overall, it appears that the design of the AVM C9 changed after we received our sample for review, particularly regarding the USB input. However, we can only report on what we have in our possession, not on what might happen to the product in the future.
John Atkinson
Editor, Stereophile