I don’t know this mic specifically, but my friend and colleague Muneer B Fenneell, who plays an acoustic 6 string cello uses its sibling for cello and it is the best sounding instrument-attached mic for this purpose I have ever come across. Only I’m not so sure about feedbacks. It’s very in the nature of this kind of mics to be prone to feedbacks. But certainly there is some headroom before feedback.
Yes it’s pricey and also kind of delicate. He already needed some cable repair, but apparently that has been improved, I heard.
He also has an Audix mic that comes quite close to the dpa sound-wise, but is a bit bulkier, and I’m not sure whether there is a mount for the classical guitar. But it’s most certainly more robust than the dpa. It is Audix D-Micro and costs in Germany 239 € which is roughly half of the dpa. In the description it says there are different mounts available.
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