My wife has had a tune 660nc for six months now. I wanted to take something more abruptly, but everything turned out the other way around. All the shortcomings I described are absent on 660. Even the sound insulation is better, although the sinks are smaller! There is no only switching between bluetooth sources and the ears do not heat up. Returned 760, ordered 660, which is 1000 cheaper. Maybe it was all just a marriage, I do not rule it out. But I need headphones now, and 660 are really good. And then immediately a jump in price tags goes on the market.
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