So I checked my pair of Apollo Bold with another Android phone with both SBC and AptxHD and I can confirm the sound degradation is spectacular when ANC is turned ON, the high-end is completely muffled and the bass is boosted. TBH it's unusable for proper musical enjoyment ! I suppose I could try with my iPad but I can't see how the device could have an impact on the way ANC works on the Bold.
that's really unfortunate, maybe it's something related to a firmware version or a different hw release, could be the case to ask Tronsmart for support?.
can confirm that mine sound absolutely the same with ANC on or off.
you can connect your Apollo with aptx-HD?
maybe there are two different hw relase, these are a couple of pics of my Apollo, maybe can be useful to understand if yours differ in any way
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