Simplest way ever for your Kse1500. Drive it by MC23. That's all.
Jriver MC23 cost just $50.
The true factor is that standard records are for speaker, not for headphones.
Extra sound process by MC23 for your e.static kse1500 make unbelievably change.
IMO, "sound stage" of a hp comes from phase and echo in the drive AMP. Without phase and echo, sound will be right between your ears bcs there no distance to make different phase for each frequency and bcs they are not mixed in the air before come in to our ears.
For Kse, MC23 DSP Studio setting are:
Effect = Environment - Studio (level 5), Vitual Sub - None, Surround - None
Headphones = Crossfeed - Subtle
What is achievements, here :
+ Very fine texture and layering of instruments
+ Very much, much larger sound stage, in all dimensions( sphere sound field). No more right between your ears!! Any time switching OFF those setting, you get again sound field less than your head side!
+ There's no boost of any frequency but bcs these remodeling sound is more native to hearing, actually all range was like boost
P.S Cirrus logic dac (CS xxxx) is well balance to my ear. It just "lack" of clarity compare to other more "musical" AKM dac, and the one in Mojo too.
CS4398 in AK and in iBasso D14 sound quite same, less musical compare to Shalling M2S(AKM4490). M2 use CS DAC 4398 and it sound differently thanM2s.
Event at low end above, they show different of Cirrus and Akm.
I think Shure's enginers choose CS is for balance native, not for musically sound.