Instruct: Classify Amazon reviews into positive or negative sentiment
Query: constant static hiss makes these unusable

We ordered these for me to use at work and are returning them due to a constant static hiss.I noticed that the featured positive review even states, "When you first turn them on ... you hear hiss but once you have sound coming through it disappears." In actuality the hiss is always there, and the reviewer just stops noticing it when audio is playing with it; it's like tuning out the sound of an AC; the sound doesn't actually go away.As a video editor there is no way I can edit with these since there is a constant static that would make it impossible to edit sound. Even if you just want good quality audio for recreational listening these would be unacceptable.Also, the volume level on them is pretty low, needing the volume to be at full blast to equal what it was at half-volume on other headphones.