This is it !!
I am an audiophile and musician...been through so many brands...like ATH M50X, Harman Kardon CL, Bose , Klipsh One and S4, Shure SE215, Urbanears Plattan, Senheisser etc.
These cans ends my hunger for quality...built is superb gonna run like marathon...comfort is like i forget them that i am wearing it...(used it 2 hrs continuous)...Now sound quality:
Soundstage: Airy and semi open cans give awesome space and noise isolation same time..for example...Adele - Rolling in the deep...its starts with rumble and adels's voice is divine..i can hear each and every instrument with tight bass and tonality...many others like hands can not erase by porcupine tree was very much separated ...its orgasmic, Opeth Damnation album sound like i have never heard before, even though i heard them like thousand times....Mr. A R Rehman feels GOD in these cans...
Highs: Little rolled off to give warm sound and much tighter tonality (I am using FiiO A3 with these as they need enough power to show what they are)
Mids: This is very strong for these cans...vocals seems like...artists singing next to you
Lows: epic presence ..just what is needed

These are EPIC SHIT!!..(Pls buy FiiO A3 with these else you will not get what you are looking for)...comfort is outmatching other headphones....look is like daft punk...;)..Black n Gold baby
I am using all Flac files...with my nexus and FiiO A3....Planning to Buy FiiO X1 for Divine exprerience
They dont go well with ipod...iphone and other apple products...cause they are more emphasized towards mids...and they cant play flac also....android rules \m/

I found the same headphone from amazon and other sites. The price was almost double. Then I found this site. I made a doubt because of the less price. I contacted the help line and their feedback was good. The delivery came within 2days. The package was totally intact; even the poly over the pack. I love headphone zone and recommend everyone to choose headphone zone instead of other sites.

Dear Headphonezone;The AGM K240 Phones r working fine.The Harman Kardon group always lives up to its expectations. Lows Mids and High r very clear with fiio Dac and fiio player especially the flac files.The headphones have to burn for long hours before u realize that u need an upgrade.Thats evolution.Otherwise I have been a collector of Cd players ;amps ;receivers and speakers.Nothing comes as close to a headphone .Headphonezone has a large collection of phones and I would appreciate if it forays into the stereo and Avr section.Speakers and mp3 and streamers.I mean I would appreciate if u open up to this segment also so that u become the numero uno website .Keyboards and active speakers have to be sold also .Instruments like Guitars sitar tablas etc can also be sold.It can be a reality of u could upgrade Ur website and link Ur retailers with them.All the best for the future.I will buy my next Headphone in 3 to 4 months.This is my 7th and first Headphone with headphonezone.Wishing All the Best to the team of HZ.

Having come across some words open back, semi open back, closed, audiophile and studio monitor. I was researching for a head phone which would be suitable to my taste. My head phoes are fully closed. I have variety brands. My old sennheiser hd 515 was brought out from my old suitcase. Having read it is 125 ohms I used it my fiio e12 amp. I was wondered by its soundstage. I started hearing my jazz and vocal songs. THen only I felt my final selection would be open back. I came to know semi open back would serve sound stage as well as some good bass also. So I again searched the hpz. Akc k240 semi back was in the field for two decades. I went for it. The delivery was quick. Wow I was amazed by its sq more over vfm. No frequeny was exaggerated. Definitely audiophile should go for it. I recommend it. But It needed fiio mont blanc amp to bring out its full performance. Thanks Hpz

I needed a pair of studio monitors quick as the headband on my R70Xs broke and I didn't have the time to fit a replacement headband. Thankfully, I was able to find the K240s in stock and HPZ saved me a lot of trouble by delivering it in less than 24 hours. Honestly, I can't thank you guys enough.

While I've been using them exclusively for monitoring, they're also a very pleasant pair to enjoy music through. Combine them with a Hip Dac and you'll be more than satisfied. They have a very pleasant sound and are comfortable for long periods. The K240s are an underrated classic and excellent for mastering.

These sound excellent for the price. One of the best headphones to buy under 10k.
However, these are not flat or neutral sounding. These are coloured and more midrangey. A great headphone for vocal lovers, but for hip hop. edm and other genres that rely on the bass, they lack sub bass. There is a boost in the upper bass and the lower mids. That boost along with the overall smooth sound gives the headphone a unique colouration that I can only call euphonic. Acoustic music is very pleasing to listen to with these. The mids on these remind me of the HD 6xx line up. Rich and smooth. They are not tonally accurate as the 650s, but they are so soothing to listen to. Vocal lovers will absolutely adore it. The treble is great, good presence at 10khz. This helps the sound to not sound overly rich + brings out a lot of detail. For the price, it is simply great. I think the resolution is better on these than the audio technica M50. These have enough details for professional use, but I think under 10k the shure srh 440s are the better option to go for if you are a professional. They have an excellent tonality and they sound neutral without any colouration. The resolution is same as these. If you are into bass heavy genres like edm and hip hop, the m50x will suit you better. but if you love vocal music and don't mind the euphonic colouration( which only adds up to the enjoyment), there is nothing better than these in the price range.

I am using this for mixing an audio drama podcast. So far really happy with the soundstage - gives you a really wide field of listening.
Also, kudos to the HZ team: really professional and considerate.