Beyerdynamic - Aventho 300 vs Sennheiser - HD 660S2

The Aventho 300 is the clear pick on raw spec strength, leading by 11.2 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the Aventho 300 if audio quality and feature breadth (ANC, codecs, multipoint) are the lead criteria for your purchase. The biggest gaps in its favor are driver size, active noise cancellation, multipoint, among others.

The HD 660S2 similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.

Both ship with comparable spatial audio, weight, water resistance, so those specs don't separate the two — focus on the differences below.

Bottom line: the Aventho 300 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.