The Momentum On-Ear headset is a scaled-down version of the Momentum Over-Ear, which came out last year.
Except for the smaller earcups and the substitution of the original leather earcup covers with ones made of a synthetic material, the headsets look pretty much the same.
In my book, there are only three things to consider when choosing a pair of headphones: sound quality, comfort and price.
Not too different from that of the bigger Momentum, with clarity of tones, good channel separation and sound-staging. A little trimming of the highs, but not serious enough to dull the overall sound quality.
The On-Ear cups feel less hot than the Over-Ear's after an extended period of listening. No problems with the synthetic earcups, except that leather would have smelled better and look more luxurious.
Very competitive for a headset of this quality. It will definitely give the Bose AE range a hard fight.
How much: $299