1. The noise reduction mode, which works here by the way, produces excellent sound quality with concert recordings and crystal-clear bombs after 3β4 hours of operation at 80%β100% volume; however, when listening to trance, 70β80% volume is normal, while at 100% volume there is a rumble and wheezing in the left earpiece; 2. OFF mode, which gives the impression of turning off the bass and results in seven hours of work with only audiobooks or voices to hear; 3. The sound transmission mode has bass, which even some outside noise adds to the overall audibility, but I'm at a loss as to how well it suits your tastes.
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