Interesting discussion here which is mostly off topic.
I just search for comparison between X5 and ZX1 and saw all the things about compressed audio sounds similar to raw....
All things aside, these are subjective.
Yes, type or IEMs or HP makes a difference. How the album is mastered made a difference, but to say it is more than any of other factors is just strange.
I have not hear or dare compare (no matter how many HP, IEM, DACS you have) as none of us have the same (even cables).
I came from multi track recording studio to digital, than trying to make the ends meet on my home rig and portability to reproduce that.
Things have changed for last 3-4 years:
- Codec had improved
- more types (DSD, DXD)
- Mastering techniques have also changed due to mastering formats and digital
- Mic techniques and types.
With all this, there is no way to really compare
During the analog days, the type of copper cables linking mic to mixers and down to tapes (now HDD) is critical in how things sound. Again, subjective. Some engineers like it warm, some like it fast and sharp.. some like it laid back. But than, these "small" copper, codec, types does make a hell a lot of difference. (difference between a hydrid cable, to silver and copper)
I would not even like to discuss about MP3 and FLAC. It is like comparing JPG and RAW. Sure, in JPG, you can still see the face of the person you love, same as in RAW but 3-4x the size. But there is a reason.
FLAC is created as initially an on-disk Archival format for CDs. Mp3, AAC are developed for the pass devices with less or not so big storage. That make sense. But with a few details removed. (just look at a JPG file and RAW, they has more or less the same concept as MP3 vs FLAC). Interpolation by devices made the difference is how MP3 sound. There is no decoder sounding the same from the same MP3 files.
The sole reason why I have a need to go DSD (even DXD) is the fact that, it was ORIGINALLY mastered into DXD or DSD format PRIOR to down sample to CDs, FLAC, MP3, AAC from most modern studios now. DXD size is prohibitive. Doesn't make sense for portability. What about DSD. Unlike Mp3, AAC, FLAC, ALAC..etc, DSD is based upon 1bit. It is very different.
I have compared this with similarly recorded FLAC 192/24, FLAC 44/16, DSD2.8 and DSD 5.6. I am pleasantly surprise at the differences. At 192/24 flac, could be very well argue to be similar to that of DSD2.8 or even DSD 5.6. It is all down to how much I can fit into a portable unit or how much it cost to purchase the original masters. (2-3x the price of a CD in fact). DSD2.6 and FLAC 24/96 or 192 has similar file size.... maybe even smaller.
If you have X3 or X5 with latest firmware, go to a few sites *particularly 2L and download a few comparison samples (FLACs and DSD). Enjoy.
So, i will use MP3/aac or itunes for Bluetooth music, FLAC and DSD for rest. Reason why I am looking at X5 or ZX1 is because, X3 sucks with the latest Beta firmware, and the LO clipped out my car's Burmester sound system (which I use mostly when travelling) Home I use full DSD DAC. Travel, hopefully use the X5 or ZX1. Only thing is, X5 plays DSD 2.8 and ZX1 doesn't.. bummer. However, I am ok with Flac, but there is still no downsampling decoder from DSD to Flac... at this moment, given I have a few DSD files already.
Rgds