I hesitated before buying this helmet. Since its release there nearly two years. The price at first: the time of its release, the Momentum cost nearly 300 The signature sound then I am at length informed, and what I read did not like (signature "laid back" slight emphasis on the bass, ...); it was, from what I read, clearly not a helmet "audiophile" ... When Neil Young presented its Pono public, helmets were used Momentums ... So, I reconsidered the purchase of this helmet. I took advantage of a significant discount on the "store" (when I bought it, the Momentum over-ear (not to be confused with the one-ear model) was proposed to 199 on amazon). So I started reading all the comments on this helmet on amazon, and there, one thing is clear: all comments of three stars or less concern model "on-ear"! The over-ear model therefore enjoys an average of between 4 and 5 stars. The sound is very pleasant when plugged directly into the jack of an iPhone or iPod, but reveals its potential when used in conjunction with the Pono. Momentum is obviously less precise and revealing my monitoring headphones Beyerdynamic DT1350, but it is also much more relaxing. I highly recommend it, maybe not 300, but without any doubt within 200
