Instruct: Classify the given review into positive or negative sentiment.
Query: ABYSMAL

...for sound-deadening these are kinda sorta OK, they manage to reduce maybe 40% of ambient noise.For music though they are an unmitigated DISASTER!!! I was so much happier with my Sennheisers, and even my cheap $20 Sonys had better sound reproduction than this.I knew I should have listened to all my audiophile friends who call Bose "the greatest marketing scam in audio."