The v5i was provided by Burson for an honest review. I have rolled some opamps before in various amplifiers. Although i think i hear a slight difference between each of them, its really hard to tell exactly what is improved or what got worse. My thoughs on rolling opamps is that you cant properly A/B them for a straight forward comparison. Swapping opamps takes quite the time and your hearing memory is short. That said, i want to think that it makes a difference going from a really cheap chip to a rather good one..But the step above " a good one"...

Let's start with the build since it is a hot topic on this headphone.   It´s not very confidence inspiring but it's chunky. Made out of mostly plastics and cast aluminum for the adjustment arms and probably aluminum or stainless for the hinges, this thing should be quite durable. However i don't see it lasting a lifetime. Since it's so heavy and the plastic seems to be of the hard kind that just cracks and shatter if dropped, i think that if this thing picks up speed during a drop, it's probably going to break. However, i don't usually drop my gear...

To start this off, i did not pay for my pair of 315. If i had payed for them the disappointment would be vast.    I have a pair of SE215 and while they are not my favourite iem, they have their place. Isolation is great, and the sound is warm and quite mid-forward and matches easy with many genres of music.    The 315 is well, not as good. Simply put.    I had high hopes on the 315, i really had. However upon first listen i though they sounded a bit strange. On some tracks like some 90s death/black metal or Bob Dylans earlier work they shine...

When i bough these i had no id'ea how they would sound. I read some reviews but it is a iem that was flying under the radar and kind of hide in the shadow of the BA200 which is TDK's flagship ( was, i think it´s discontinued )    All plastic build, feels solid but not expensive. They do have a great fit and can be used both with deep or shallow insertion and a various amount of tips. Cable up can be bothersome. The isolation with a modestly deep insertion is impressive even if the housing appear to be vented. They leak some sound if you crank it...

The housing has a rounder shape then the vsd3/5 and i much prefer it this way. While the shape and looks is simple, it does not feel very cheap. The diamond cut shape on the vsd3/5 seems a little bit gimmicky to me. The fit is very good and comfortable. Very negative fit so it does not stick out of my ears at all.   The cable is also very good. It is thin, but feels sturdy enough. However i would like a angled jack like on the vsd1s and vc02 for example. They have the jack, why not put it here as well? Also the cable lacks strain reliefs, a...