Hey, Tried to clean up the initial post. Let me know of major posts I've missed.
Also, just received the ASG-1s with filters going to let these burn in for a while. But initial impressions seem promising.
The soundstage seems to have changed a little with the filters, but not reduced in anyway. The tracks where the vocals seemed to be emerging from behind are now more centered.
The mid have definitely been reduced, I actually had gotten used to the forward mid's (they didn't bother me anymore) but this definitely makes things much easier on the ears for long listening. The vocals are still forward but seem to blend into the music much better. I no longer felt that for any of the songs, the background music was added as an after thought which occasionally occurred with songs with very forward mids..
As this is a new pair, the bass and overall sound has yet to settle and open up, so i'll give it a few days of burn in before looking to see the filter's effects on the bass and sub-bass.
I also increased the EQ of the 14khz and 20 khz a bit and they really do add a sparkle to the music,
With regards to Amping and Source, as well as another demonstration of the sound-stage of these, check out Where do I go from here - Carpenters (preferably at least 320kbps).
At around 30 secs when the chime travels from the left to right side. Using other headphones, or a lower quality source and amp, the chime seems to run straight through you head from left to right. But with a higher quality DAC/AMP the chime will seem to go right behind and around your head/neck before continuing to the other side. Its a little weird when it happens but it adds a whole new definition of 3-D sound. I'm not sure exactly what exactly is causing this phenomenon, but it definitely is most pronounced with the ASG-1s and a good source, it still occurs but to much lesser degree from my phone than my E10+Cmoy