With ANC off, it sounds very muffled! Contacted seller and initiated return and refund, which took less than 24 hours. Will update this review in the future if there are any issues with these in the future. I cant speak to bass reproduction, as the music I listen to is generally strongest in the higher registers, except to say that it seems more than adequate. No such problem with the Reefs. But for short amounts of walking or a pedicure, these are comfortable. I can no longer be a loyal Logitech customer after many years of taking for granted that they make the best mice. the color is perfect and the hours of use per charge is great! The sound is great and the mic works well. I wouldnt use them for the gun range though with microphone pass through.