INTRODUCTION:
 
This is a quick review of the DUNU DN-22M Detonator. 
I've never heard of DUNU until a few months ago. I was always curious about their IEM so when I got the DN-22M I was very excited. 
The DN-22M comes with an abundant of accessories for the low price of $45-$50.
 
  
 
CONTENTS:
 
The DN-22M comes with plenty of tips and accessories. I like the little detail they put into this IEM.

1. DN-22M 
2. Hardcase
3. Pouch
4. Clip
5. 7 pair of tips

 
 
BUILD QUALITY
 
The DN-22M is well built, it feels solid and look great thanks to the metal construction and gunmetal chrome finish.
The cord is about 4 feet and is on the thin side and microphonic is not the best. The 45 degree 3.5mm plug works well on phones and mp3 player with recessed headphone jack due to big aftermarket case. The microphone works well and my wife didn't have any problem hearing me. The cable management strap is a very nice touch
 
 
 
 
 
  
 
COMFORT:
 
I've always had issue with earphone comfort and fit. It's hard for me to get a good fit and if they fit in my ear canal than it become uncomfortable after a few minutes. With the DN-22M I didn't have much difficulty getting them to to fit. Surprisingly the default tips was a perfect fit for me, I didn't have to insert them in deep like other earphones I've tried. I'm pretty sure the provided tips will work for most people. Isolation not the best, with the music off I can hear people around me.
 
SOUND Quality:
 
I decided to use my Samsung Galaxy Nexus for this review since it was the picture of my gnex that got me this review sample.
I'm a basshead so bass is important to me. Using my normal bassy tracks from Master P and Zapp and Roger the DN-22M delivers good clean lows with good impact, it never feels lacking in anyway. The mids are very good, vocals sounds good and natural. The only negative is the highs. At low volume it is very enjoyable but when you turn it up it become ear piercing, especially when listening to dubstep. This can be fixed with EQ but for those who are sensitive to highs and don't have or want to EQ this could be a problem.
 
CONCLUSION:
 
DUNU did a lot of things right with this earphone. The DN-22M is a very good, very well built, and very good sounding earphone for not a lot of money. It's come with a generous supply of tips and accessories. The DN-22M should be at the top of the list if you're in the market for a low price earphone.
 
 
I would like to thank Rocky for sending me the DN-22M. Due to an ear infection this review is long overdue. This is just a quick impression/review. I will add more to it at a later time

I've been wanting a bassy open headphone for a while and after a bunch of research I decided on the HE-400. I normally have no interest in high end headphones because they lack bass, but from what I've read the HE-400 will give me a decent amount.
This is a quick impression from a basshead's point of view since there's already plenty of reviews, but most reviews are from audiophile who don't normally use and listen to bassy headphones.
I used the new FiiO E12 (the no bass version) for this impression with flat EQ on my iPod video 5.5G.
I use this set up because I have multiple listening spot in my house.
 
Value:
Definitely worth the $400, I got mine from Justin @ headamp.com for $335 shipped, factor in the sound and build and it easily worth more than $400.... If you're an audiophile. For bassheads it would depend on how much bass you're looking for.
 
Audio Quality:
I love the sound of the HE-400 but I do wish there was a bit more rumble, but I wasn't expecting it since it's an open audiophile headphone. The sound quality wasn't the leap in sound I thought it was. It's better than what I previously had but it wasn't that much better it's more of a different better. To my ears the HE-400 kinda sound like the portapro (which I love btw) but better everything. The mids are great and highs are nicely details without piercing my ears like most audiophile headphones. Vocals are nice and clear. 
Now for the bass. It's good bass, clean, fast and just loud enough but no way is it basshead level.
For audiophiles who don't normally listen to bassy music or use basshead headphone will call the HE-400 bass heavy. For us basshead it's not even entry level. It's nice bass but lacking in quantity even with a bass boosting amp. The FiiO E12 with it's weak bass boost did not do much in uping the bass quantity. The quality of bass is great though.
 
Design:
I love the design of the HE-400, it easily one of the best looking headphone I've used. Build quality is solid too. The cord is the only issue I have, it's too long and too stiff.
 
Comfort:
I personally did not have any issue with comfort. I had mine on for 3 plus hours without any discomfort, but I don't normally have issues with uncomfortable headphones (except the V-Moda crossfade and Shure SRH750DJ) so take what you want from that. 
 
Overall:
I am a basshead but my demand for bass is not what it use to be. I don't want bass all the time, but when I'm in the mood for bass I want a lot of it. The HE-400 is good enough for normal listening session, but when I'm in the mood for some serious bass I usually skip the HE-400. When I first started here I got a lot of recommendation from audiophiles saying this and that has a lot of bass, but when I buy them they lack bass big time, I realized most audiophiles have a very different view on bass. What's lacking to bassheads are a lot to audiophiles. The HE-400 falls into this category.
Overall I'm happy with the HE-400. It sounds great and even though it's not basshead level, the bass is good enough.
I'm currently looking into other amp that will max out the HE-400 so I might update this later, but for now the E12 is not doing the job I bought it for so back it goes and will be replaced by the C5.
 
 
EDIT:
[02/20/2013] Today I decided to use my E07K, I max out the bass(10) and gain(12) and the HE-400 gave me a good rumble, but once I up the volume to about 40 (65%-70%) it started to distort. 
At least now I know the HE-400 can give me a bit more bass quantity with the right amp. The E07K is not the right amp, SQ suffers when using this amp.
I have come to a conclusion, this headphone will never truly satisfy a true basshead

I'm gonna write a quick impression since there isn't too many information and/or reviews on this headphone, especially from a basshead.
This is just my opinion and is based on my preference. I'm a basshead but my demand for bass is not what it used to be. Bass is still my top criteria when purchasing headphones followed by curiosity.
 
 

 
 
 
To start, these are great looking headphones, they're built really good and it's one of the more durable headphones I've ever had. They are also very comfortable and are not too bulky.
 
I listen to mostly edm, rap, than indie rock and country. To my ears this headphone works great with all these genre of music. For rap I just turn up the bass on my FiiO E11 to 2 and it gives me enough bass and impact. Bass hits hard when the track calls for it and behaves when it don't. The bass quantity is probably a couple of notches above entry level bass for bassheads. If you're new or is still in the "Beats phase" where you want a huge amount of bass this is not the headphone for you. The bass on this headphone is more for the seasoned basshead who has learned to appreciate good controlled bass while sacrificing a little bit of quantity for quality.
 
The mids are pretty good for me, vocals are great and forward, but sometime it does get a bit shouty at high volume, but only on some track.
 
The highs could use some sparkle and this will probably be the reason why some might not like this headphone. I like warm/dark sounding headphones so this don't really bother me.
 
The only major issues for me would be the non-replaceable ear pads, I would really hate to trash these just because the ear pads are worn. 
 
This isn't the best sounding headphone I've had or heard but for some reason I can't seem to stop using them. With good imaging and above average soundstage, I use them for everything, gaming, movies, music, portable, etc. This is probably the only headphone I would never sell and would re-buy if it breaks. I bought these on sale for $152 shipped, and at this price it's a steal and is well worth the $249-$299 msrp.
 
 
 
 
 
 
 
 
 
 

This is a quick impression from a basshead's point of view. I'm writing this because there's almost ZERO info on these headphones, and because I don't speak audiophile, this will be a quick.
 

 
 
Like I said, I'm a proud basshead but I do occasionally listen to music with little bass. I knew when I got these they're gonna be bass lite and indeed they are. They do a decent job on country and indie rock, but using them for dubstep, EDM or RAP is something no one should do.  
 
I originally bought these for gaming and movies on my tablets, and they sounded great when using it for that purpose.
 
Value - The value got 5 stars because I got these for $29 shipped
 
Audio Quality - I gave the audio quality 4 stars because they do sound pretty good with non bassy music and they are great for movies and gaming. 
 
Design - Design got 3.5 star because they look silly when on your head. I wouldn't wear these in public. The build quality is pretty good though.
 
Comfort - Easily one of most comfortable headphones I've owned. I had zero problems with the wings and my head is pretty small..... I think?
 
Overall - Solid 4 stars for non basshead. Bass junkie should stay away.
 
 
The reason why I bought the AD300 instead of the the more popular AD700 is because (1) it was damn cheap $29.99 shipped (2) was suppose to have a little more bass than the AD700 and (3) it's smaller and didn't have that ugly purple grill.