barongearmu
New Head-Fier
- Joined
- Dec 30, 2013
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I don't think these are actually the same filters that are employed by the m9XX. I think the m9XX uses custom versions, primarily for anti-aliasing and anti-modulation distortion control more than to actually change the sound. Unfortunately the bifrost 4490 is the only other amp I know of that uses this chip and it doesn't seem to allow you to use the filters at all, so it's hard to find a point of comparison. My reason for thinking this is that Grace actually goes out of their way on a couple of the filters to say the effect shouldn't be directly audible, unlike how they're described by AKM as changing the sound.
Plus, there's four of one, and five of the other. I'd think if they were just exposing the underlying filter it would match up. Unless maybe the "traditional" filter by akm isn't a mode, but just a picture for comparison? Need to go look up some spec sheets.