The ATH-AD900s are a well-known headphone made in Japan. They’re recognised as a clean, accurate and possibly under-priced headphone. I very recently purchased a pair and they’ve really opened my eyes in a number of ways.
On first listen, the AD900s sounded a bit “thin” for my liking. I’m definitely not a bass-head, but I was worried I would miss the presence of a solid kick in the bass. As I’ve listened to the AD900s more and more I’ve actually found that I’m loving the clean and possibly slightly understated bass from these phones.
In my article about compressed audio I discussed the phenomenon of “masking”. Masking is what happens when a loud sound prevents us from hearing a quiet sound. I’d never thought about it in relation to speakers or headphones before, but I’m starting to think it plays a part in the detail of any reproduction device. I am hearing details in music with the AD900s that I’ve never heard through other high quality speakers and phones I’ve used. That’s not to say the AD900s are the best phones on the planet, but they are definitely very, very good. What makes them so good is their balance. Because the different frequencies are so nicely balanced, the bass doesn’t overshadow the mids and treble and vice versa. There’s no harshness in the top end to get in the way of the rest of the music and the vocals don’t jump out over and above the instrumentation. Everything is exactly where it belongs.
It’s probably important to note that the AD900s are an open style headphone which means that even though they cover your whole ear, they don’t cut out any sound from the world around you. It also means that people around you can hear what you’re listening to pretty clearly so they’re not a good choice for open offices or situations where others don’t want to hear your music.
Let’s look at the individual characteristics of the headphones:
Speaker Driver : 53mm
Frequency Range : 5 – 35,000Hz
Power Handling : 700mW
Impedance : 35 ohms
Attack: The attack from the AD900s is beautiful, but understated. They’re a very sensitive earphone with a relatively high impedance which makes them very responsive (a bit like a powerful sports car with excellent breaks). They go fast when needed and stop just as quickly. The result to your ears is accuracy and energy. The AD900s sound exciting and lively at all frequencies and this means a good attack in the bass. During Wayman Tisdale’s “Take the Lord Along with You”, the bass is crisp and sharp with plenty of detail. There’s no muddiness or lag in the bass – it’s agile. However, there will be a lack of punch for some people and this means you don’t feel as much of the attack as you might like. The AD900s are probably more accurate than some of the more exciting earphones around, but that does mean they lack the up-front excitement created by the feeling of some good, hard-hitting bass.
Rating: 7.5 / 10
Mass: As you’ve probably already gathered, this could be the one weak point of the AD900s if you like bass, but this is where audio becomes such a personal affair. I love the fact that the AD900s are so realistic. If a track was recorded with lots of bass, the AD900s reproduce it, but they also shine a very bright light on tracks recorded without much bass. The result can be a slightly thin-sounding experience. Even though that’s more a reflection of the recording and engineering of the track, many headphones will lend a little extra bass to music and cover these shortcomings.
I tried listening to “Halftime” by Nas and there’s plenty of bass, but it’s not thumping on my eardrums like an angry neighbour. It’s very present, but not overpowering and I know some people enjoy the hard-hitting thump.
Rating: 5 / 10
Vocals / Mids
It’s almost difficult to review the mids and vocals from the AD900s because they’re exactly what they should be and perfectly balanced with everything else. They don’t stick out as a flat spot or a highlight. The mids and vocals are smooth, realistic and perfectly placed within the overall musical picture. There’s really nothing to report (in a good way) – they’re perfect.
Rating: 8.5 / 10
Wow. If only I could give them a 12 out of 10. Detail is the AD900’s party trick. Their accuracy and agility is simply awesome so you hear every tiny detail in all of your music. Even driven straight from an iPod (5th Generation), the accuracy is outstanding. The iPod has to run at nearly 100% volume, but there’s still a little headroom to turn it up if necessary and the quality is still excellent.
When listening to “Learn to Love” by Harry Connick, Jr. there are some minor riffs and fills from the backing orchestra and a Hammond organ. On other earphones I’ve used, these riffs tend to get lost in the mix, but on the AD900s you can hear even the subtlest textures and details within the backing instrumentation – it’s quite an experience.
One of the best things about the level of detail the AD900s provide is that the music is exciting and energetic. There are so many different sounds and textures going on that you can really explore the music’s twists and turns. Even tracks you used to find boring can surprise you with a new detail or texture you’ve never heard before. This is true in all music, but it’s particularly noticeable in classical music. Listening to “Sarasate: Zigeunerweisen, Op.20” and “Capriccio Italien Op. 45” is quite amazing as you hear every pluck and pop and squeak from every instrument in the orchestra. I’m not a classical fan as such, but I love hearing the odd orchestral track just to experience all the textures and details I can hear through the AD900s.
Rating: 8.9 / 10
Staging was what initially attracted me to the AD900s. Other reviews I’d read suggested that the AD900s offered a broad and detailed soundstage and they really do. If you close your eyes while listening to a well recorded piece of music, the sound seems to come from a space outside of the confines of your head and the headphones. All that space also means that it’s easy to separate where different sounds are coming from.
I use Capriccio Italien Op. 45 to test for staging and placement of sounds because there are lots of quiet moments with individual groups in the orchestra playing. The AD900s paint a perfect picture of the orchestra. You can hear exactly where the horn section is placed and you can hear that they’re further away from you than the strings. The french horns are slightly to the right while the oboes and clarinets are more centred, but still slightly to the left. The detail is beautifully clear. I have heard headphones with slightly better staging (like the Ultrasone Edition 8s), but the AD900s are still extremely good, especially for the price.
Rating: 8.5 / 10
For around $300 you’ll have a very hard time finding a better pair of headphones in terms of accuracy, staging and comfort. I regularly wear these headphones all day (literally) and actually miss them when I take them off because they are SO comfortable. I have a shaved head so there’s no hair to add padding for headphones and most become uncomfortable in time, but the AD900s are hands-down the most comfortable thing I’ve ever worn on my head (including hats and beanies)!
If you love bass from a variety of music, don’t jump at the AD900s until you’ve had a good listen to a range of tracks to see if the “realistic” bass is enough for you. If accuracy, detail and clarity is your thing, do yourself a favour and check these out. If you’re not sure what you like you should definitely give the AD900s a try, but make sure you listen to them for a little while on a range of tracks before making your mind up. Most of us aren’t used to the kind of unbiased sound they give and you may feel a little underwhelmed at first, but give them some time, close your eyes and explore the music a bit – you might be surprised.
All-in-all I just love these headphones and often find myself turning to these instead of high quality speaker setups. I love the accuracy, detail and intimacy of the sound. If you’re buying headphones and have around $300 to spend you should definitely check these out. Even if you’re spending significantly more than $300, take a listen to the ATH-AD900s because they will embarrass many more expensive models.
Overall Rating: 7 / 10
Additional Note: The model below the AD900s is the ATH-AD700 and although Audio Technica completely missed the mark on the colour scheme (purple and gold), they’re an excellent headphone. There is absolutely no doubt that the AD900s are significantly better and are worth the extra $$$. The build quality and sound quality are both upgraded on the AD900s, but check out the AD700s if the AD900s are more than you want to spend.