I found the sound quality of these headphones to be good with both wireless and wired headphones. As others have noted, there are notable differences in using these wired devices, as there will inevitably be differences between being driven directly by the phone's soundstage and having the phone decode and manipulate the Bluetooth audio stream. I can't say the quality differs between wired and wireless as the response is slightly different. While they can be a little awkward when taking calls, the mic quality is surprisingly good for a secondary function. The controls are generally good for music playback and call management. Pairing with devices is a simple and fairly reliable process. When they were new I saw almost 8 hours of playback in the first few weeks of use. Over time this figure has reduced somewhat as the battery goes through the inevitable life cycle of a lithium ion battery - now it's 6 to 7 hours. Standard earpads are glued to the inseam, which are likely to fail in a few months; Thankfully, a replacement costs $10 a set and is better made (note that installation is a little tricky). More sophistication than a downside, I' I ran into some random bluetooth music playback issues shortly after turning on the headphones and syncing them to my phone. It seems to take around 30-60 seconds for the connection between the headphones and the phone to stabilize. This can also be an issue when making calls, but since I'm dialing in this window and then waiting for a connection, the effect may not be noticeable to me. It could also be a phone issue, but I've experienced this on two phones from different manufacturers. After many months of ownership I am still satisfied with these headphones. but since I'm dialing during this window and then waiting for a connection, the effect may not be noticeable to me. It could also be a phone problem but I've experienced this on two phones from different manufacturers. After many months of ownership I am still satisfied with these headphones. but since I'm dialing during this window and then waiting for a connection, the effect may not be noticeable to me. It could also be a phone issue, but I've experienced this on two phones from different manufacturers. After many months of ownership I am still satisfied with these headphones. but I've experienced this on two phones from different manufacturers. After many months of ownership I am still satisfied with these headphones. but I've experienced this on two phones from different manufacturers. After many months of ownership I am still satisfied with these headphones.
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