Excerpt: They are comfortable, sound great and look nice. After a couple of months of use the active cancelling started acting up. Now I have a low rumbling/vibrating driver on the left side of the set.
Summary: I really wanted to like these headphones! I had some of the anc7's ~4 years ago, and loved them! They were half the price of the b0se noise-cancelling headphones, and I figured the anc9's must be amazing; so much so that I returned the B0se phones that I had bought 3 weeks earlier.
Pros: 3 modes of noise cancellation, for whatever that's worth.
Excerpt: They're better for music than the Sony MDR-NC60, but the Sony fits closer to the head, is more comfortable, stows away in a much smaller case, and appears to be a much better build quality. I lost my MDR-NC60's and couldn't find a replacement, so I took a chance on the more expensive Audio-Technia.
Excerpt: Noise Cancellation Audio Technica is no newcomer to noise cancelling headphones. They have released a number in the past including the best-selling ath ANC7b's. So what makes the ANC 9 unique? Well it features a new technology developed by audio Technica known as tri-level noise cancellation.
Pros: Very good audio quality, nice accessories, tri - level noise cancellation is quite effective
Cons: Still a bit pricey at 200$, Not very portable due to bulky case
Summary: Choose these over the Bose after lots of research. The only disappointing thing is I didn't try these before buying...is so, I MAY have changed my mind. I tried the Bose and must say, they were fantastic but chose these after research suggested that the Bose were not built to last like these.
Summary: Fazit: * Bei eingeschaltetem NC starkes Grundrauschen iin allen 3 Modi * NC Leistung gut, aber unterstützt durch Over-Ear * Sound - aktiv sehr gut, passiv ok bin persönlich bei AKG On-Ear 490NC gelandet, da aktiv/passiv ident und NC Leistung gleichauf (trotz On-Ear).