Bonedo's Nick Mavridis tests 4466 and 4488 and finds only pros and no cons, resulting in a 5-star review.
Bonedo is one of Germany's leading online gear magazines, but we have translated some of the key takeaways. And if you are comfortable reading German (or relying on auto-translation), you can find the link to the full review below. Finally, the review pages hold a number of audio samples. While these are also in German, the quality of the sound can easily be evaluated.
"When testing the DPA 6066 CORE, it became clear that the newly developed headset - that the two new microphones DPA 4466 CORE and DPA 4488 CORE also feature - is an absolute masterpiece. A piece of wire? That's right: Due to the low weight of the construction (and of course: the capsule) and the excellent ergonomic properties, it is possible to wear the headsets for a full working day without any problems. I assume this applies to a wide variety of head shapes and sizes because the headset can be adjusted quickly and easily. It even fit toddlers.
Both DPA 4466 CORE and DPA 4488 CORE are excellent headset microphones. They both sound great, and the construction is simply ingenious. (...) It is very positiv that the DPA 4488 CORE - one of the best directional miniature capsules (if not the best!) - has now been combined with one of the best headset systems (perhaps also: the best). In short: The fact that you can now get a 4466 is very nice, but the fact that you can get a 4488 is terrific.
Excellent sound results
Very good fit
High flexibility and easy adjustment
Read the full review...