
Edited by Kouzelna - 3/6/12 at 11:04pm
Be a part of the community.
It's free, join today!

Nice Review. The Mstage is really a good bargain
What Gain did you use it with the AKG 702 ?
Nice review!
Now I'm trying to find "Suspended in Dusk" - it doesn't look like it was on the original release of the album (which is what I have).
Nice work!
Thanks!
PS
I have Selene the Death Dealer on my side so watch out!![]()
0n the review...btw, who is Chucky?
Don't tell him, but I'd trade Charles for Selene any day! 
Suspended in Dusk was on the limited release digipak edition, which also interestingly came with lots more photos of the girls together at at time when that wasn't so ordinary and accepted.
I tried several gain settings and settled on 0dB. Provides the best noise floor, to my ears, and also the other settings appeared to compromise the soundstage.
Thanks for the comments!
Kate Beckinsale is taken so you will have to settle for Charles.
Sorry.
I know, I know. Lucky bastard. Her new movie was awesome, BTW. She still looks fabulicious.
Still waiting for the O2, should be here by Thursday. I keep checking my mail with terrific anticipation, but that strangely doesn't seem to help it get here any faster. 
This planet has only been around for about 4.5 billion years. Is that even enough time to fully burn-in a pair of AKG's? 
Loved the review, and I am a bit more interested now in this particular amp/headphone combination.
Some say it actually takes a little longer 
(I've owned two, and it typically takes me about 100, then improves a little each month after that for a little while).
Just a new post here, I got my O2 amp today and will be putting it through the ropes against the M-Stage, and writing about it soon after.
Amazing FYI, if you've seen my for sale ad, the photos of the O2's gold case are terrible. In actuality, the case is totally gorgeous. The fit and finish is perfect, and the color awesome, except of course around the cutouts on the faceplate, which could be worked just a littler finer, painted, and rubber seals put in to give it a professional look. Something I assume any DIY person can do in about half an hour.
It's really awesome. I'll try to get some better photos of it. And while not "fitting into a pocket" this amp is definitely what I would consider portable! It's very tiny.
OK boys and girls, I spent an hour with them last night side by side, and here's the drill on the comparison:
The O2 by far is more clear, neutral and detailed. The M-Stage is a dark sounding amp, with a more "tube like" character in a sense. I would choose the O2 hands down because of its truly "transparent" clarity, and its seeming incredible ability to really pump out each and every detail of the recording.
BUT -
The problem I am having with the O2 is that they are not really able to power the K702 as well as the M-Stage. At least, that is how it seems to me, just from a "hearing" perspective. This is what I mean:
I LOVE the O2. But there is simply not enough depth and body during more complex parts of songs as you hear with the M-Stage. When a song really gets going, it seems that part of the bottom drops out, whereas the M-Stage has lots of depth and "uumph," though at with the sacrifice of that pristine clarity and just superb detail that the O2 has. From my experience with amps and the K702, I am thinking as a relative newbie anyway, that this means the K702 is not being properly driven with the O2. At least, that is the sound: it seems as if the M-Stage is pumping that K702 full of energy and moving the stuff around in there, whereas the O2 gives it enough juice to play well, but not really "groove" and shake its booty around.
Would love comments, but consider the O2 up for sale as of this moment.
I just got my O2 last night and have been listening with a significantly more efficient ATH-M50s. I am at work now, but I do happen to have an iPod Touch on me with the same LOD that you are using, and the sound is considerably quieter than it is when listening through my Logitech Squeezebox Touch RCA analog outputs. I am no engineer, but it seems that the SB touch output is doubled with regards to voltage when compared to the iPod. It's too loud for me to play without having to disable the fixed volume (100%) setting on the SB, even at the lowest possible settings with the O2. I have been setting the volume level on the O2 in a fixed position, while controlling the listening level by adjusting the volume with the SB.
I was using a Headroom Micro Amp in the same setup, and the way you describe the sound quality improvement of the O2 is basically the same as my experience. I do not have any batteries installed in mine, as I am using it strictly with AC power. The O2, under battery power, might not be as loud with some headphones, if I am understanding what is being discussed over in the O2 thread.
Are you able to remove the batteries? I thought it would damage the O2 to run it without the batteries installed, even if you are using AC power (which I was during my test).
I'm hoping for more responses here, maybe from Chris J and Liamstrain (and others), as I hate to sacrifice the clarity of the O2 if I could somehow mod or adjust it to work properly with the K702. Barring that, I will sell it and keep the M-Stage, which sounds great, but significantly dark to the point that I will not consider it a permanent solution. Just until I get more money, and can buy a WA6.
Fixed the issue. A battery had gotten loose in shipping. Once I reinstalled it, the problem magically went away.
Here's a quote from my newly updated O2 ad:
Comparison to my M-Stage amp:
It came down to a serious toss up with the M-Stage, and basically the bottom line is this:
The O2 by far has more clarity, detail, and sonic accuracy in my opinion. It is a great amp. But the M-Stage has a bit warmer, "tube-like" sound, and since I love tubes, I'll stay with it instead. However, the M-Stage lacks a lot of the accuracy, presence, clarity and detail of the O2 so it is at great sacrifice I do it. It just boils down to my particular preference for tubes, which I currently can't afford. So the M-Stage is the one I'll keep, at least until I can afford a WA6.