What exactly does a M scaler upsampler do?
...It amazes me because I already feel like dropping 5K on DAC/AMP is already quite expensive considering that most TOTL cans cost around 4-6K.
Is the DAVE for example that much better than say a DAC 3 from Benchmark? I love Benchmark products as they are a no nonsense company but seeing so many people willing to buy the Dave despite its price makes me scratch my head. A DAC can't be that much better can it...
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If 5K is your prefered limit, then a TT2 will more closely fit that brief and will have a more powerful amp section (than DAVE) that should be more suitable for the lower efficiency headphones in this thread. But it won't overall sound as good as DAVE (from many others comments - I haven't directly compared the two).
The M-scaler, in the simplest sense, just upscales the source PCM file. You can also upscale in s/w on your server, which many music apps do, but the notable one for SQ is HQP, but that puts a significant load on the server.
In a more detailed sense, there's a lot more to it than just upscaling and I don't have the technical knowledge nor patience to try to explain it all. The bottom line is that the M-scaler does put DAVE or TT2 (and to some extent, other models) into the next higher league of SQ.
Somewhat confusingly, the improvement can be quite subtle until you latch onto it, then it can become profound. It also depends on other factors, such as the quality of the BNC cables. So more than ever, an audition is essential. Other people's subjective opinions aren't going to help much here. Particularly, as some find DAVE's sound a bit too forward - not as euphonically romantic as some rivals.
Personally, I'm dissapointed that the m-scaler FPGA technology aparently can't be built inside DAVE - because I originally chose DAVE primarily because it was a single box DAC/Amp solution, but that's life.
The bottom line is that there's no easy answer to these kinds of DAC questions. So probably best to stick to your price limit because, however much you pay, there will always be something better and more expensive to tempt you.