I had a pair of Bose QC3's that failed, and after doing some research and checking out a co-workers QC25's I decided to not go with Bose's trade-in program and look into another brand.

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.

3 modes of noise cancellation; for whatever that's worth

pretty flat sound

Product has worked as expected. noise cancellation is great, the big plus is that you dont always have to have the noise canceling on and dont need batteries to use all the time. I cant imagine having to change batteries every 30-40 hours of use, most of the time I use them without cancellation and...

Exactly what I was after - peace within a noisy office environment.

I just acquire it secondhand, so I give you my opinion hot no recoil. So far I have mostly used small walkman headphones Philips type

Very clear and comfortable to wear, great price and product. I would recommend these earphones for travel as they didn't miss a beat very easy to fold away when not in use. Not going to paid Excessive prices - that's the number one reason I purchased this product.

Love these headphones! I can wear them for 9 hours straight at work and they are still super comfortable. Noise cancelling works well and makes music sound even better when it is on. I definitely recommend these to anyone and everyone! Definitely a necessity if you work in an office.

The greatest gift a pair of noise- cancelling headphones can give – provided they deliver on what they promise – is the ability to drown out the noise of the world and offer a moment, or two, to focus only on the music. It's selective hearing at its best.

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.

Very good audio quality; nice accessories; tri-level noise cancellation is quite effective

Still a bit pricey at 200$; Not very portable due to bulky case

These worked a treat on my long flights. They reduced the roar of the 777 to a dull hum that you barely notice once you have music or other audio playing. Only negatives is the size (they dont fold) and the battery being hard to remove from the batt..