[Shawn71]

  I received my E12 2 days ago. It must be a newer version I think as the bass boost switch seems to really thicken the sound. It does not sound to my ears like a subtle change. I'm sure many would really enjoy what the bass boost on this newer version does, however it is not what I want to complement my specific set of headphones. Would anyone be interested in trading their v1 for my newer model? I feel that the v1 may be more of what I am looking for in terms of an added bass boost.

The Bass Boost on my E12 is a true smooth transition on my HD600.......no affect or whatsoever in other areas than bass.

 

[Chris J]

  +1, I got mine 3 months ago and believe to be newer......

 
I got mine 8-9 months ago, it was version 2.

 

[Mediahound]

I got mine 8-9 months ago, it was version 2.

How can I tell which version I have? I'm selling mine but would like to tell potential buyers which version it is.

 

[BenF]

How can I tell which version I have? I'm selling mine but would like to tell potential buyers which version it is.

 
Unless you bought it during the "beta" period, you have versions 2 - a.k.a "production version".

 

[JUSTINDTH]

I would like to trade my 4 day old (new version) E12 for a version 2 E12. Anyone feel like switching with me? My number by the security scratchy thing at the top of the box says K344b. Anyone know which numbers correspond to which versions?

I see now fiio has updated their website to show the current version frequency reaponse graph. Thank you fiio.

 

[knowyoutang]

I don't believe I've heard it yet from a FiiO but just making sure it's there. I have some very low impendence and easy to drive 16 ohm IEM's that are sensitive to that kind of stuff. They aren't expensive, nor do I use them often, but my O2 has a slight problem just as you turn the volume up from nothing.

 

[BenF]

I would like to trade my 4 day old (new version) E12 for a version 2 E12. Anyone feel like switching with me? My number by the security scratchy thing at the top of the box says K344b. Anyone know which numbers correspond to which versions?

I see now fiio has updated their website to show the current version frequency reaponse graph. Thank you fiio.

Your 4 day old E12 is already version 2.

 

[StanD]

 
Your 4 day old E12 is already version 2.

That came out funny 

 

[miceblue]

I don't believe I've heard it yet from a FiiO but just making sure it's there. I have some very low impendence and easy to drive 16 ohm IEM's that are sensitive to that kind of stuff. They aren't expensive, nor do I use them often, but my O2 has a slight problem just as you turn the volume up from nothing.

I'm not sure what you're asking, but if you're wondering if the E12 has a channel imbalance at low volume levels like the O2 does, then the answer is yes the E12 does have the low-volume channel imbalance.

 

[JUSTINDTH]

Your 4 day old E12 is already version 2.

I must admit I am quite confused on how many versions there are. My understanding is as follows;
Version 1 was preproduction and bass boost was 20Hz
Version 2 was production version and boost was 50Hz
Version 3 is current version and is >5db @ 100Hz

Someone please correct me if I'm wrong. I just want to trade what I have, for a more subtle boost.

 

[StanD]

I'm not sure what you're asking, but if you're wondering if the E12 has a channel imbalance at low volume levels like the O2 does, then the answer is yes the E12 does have the low-volume channel imbalance.

Probably a mistracking of channels in the volume control.

 

[jazzman7]

I must admit I am quite confused on how many versions there are. Must understanding is as follows;
Version 1 was preproduction and bass boost was 20Hz
Version 2 was production version and boost was 50Hz
Version 3 is current version and is >5db @ 100Hz

Someone please correct me if I'm wrong. I just want to trade what I have, for a more subtle boost.

I think there are only two versions.  JamesFiiO indicated the change from the pre-production model to the production model back in Post 1008:
 
http://www.head-fi.org/t/620339/fiio-flagship-portable-amp-mont-blanc-e12-discussing-thread-the-pre-order-unit-arrives/1005#post_9132609
 
The red curve in that post is very similar (perhaps identical) to the published one on FiiO's website for the production E12:
 
http://fiio.com.cn/UploadFiles/main/Images/2013/12/20131207182737.jpg
 
The curve on FiiO's website also matches another produced by another Head-fi'er via RIAA measurement:
 
http://www.head-fi.org/t/671590/rmaa-comparison-fiio-e17-alpen-and-e12-mont-blanc
 
The curves can be hard to compare because there is no reference level chosen in either of the FiiO curves (e.g. 0dB at 1kHz). 

 

[JUSTINDTH]

  I think there are only two versions.  JamesFiiO indicated the change from the pre-production model to the production model back in Post 1008:
 

 
It would be nice if we can get an official response from fiio. Perhaps James is willing to chime in here?

 

[Change is Good]

Doubt it... James has chimed in on this topic enough times, already.

 

[pngwn]

I'm confused... where did you hear about a new version with an even "higher" bass boost? This is the second time, that I remember, that someone has posted in this thread about mysterious versions past the official production model, aka version 2.