Haven't heard of it... Do you have pictures/link?
And I know there's also the BT20(S)/Fostex+IEM pairings but that doesn't count due to their size. In my opinion anyway![]()
Here they are...
https://www.e-earphone.jp/shop/shopdetail.html?brandcode=000000209236&search=kong+x&sort=price_desc
A balanced armature and a 10 mm dynamic driver. They were pretty bass heavy but still had decent mids and extended highs.
They got really loud. The plastic they are made of was really cheap though.
They are pretty old now, so only used SBS and AAC. They are big, but the case is HUGE.
In the pictures you can use that carabiner clip as a reference.
It doesn't fit pockets. Not even huge clown pockets.