You are getting a big improvement with a better amp, whether you apply EQ or not.
Only more power can provide better bass control, impact, dynamics and transients.
In fact, you loose quite a bit of headroom, so a more powerful amp is even more advisable, if you use EQ.
After being not very impressed last time, I have tried a few of these profiles again.
There is a free software called
Mega Switcher which makes this a lot easier.
(It takes some time to input all the profiles you intend to use)
They still don't work well for me on the SR-007 Mk1 or Mk2. They have different versions and require bending the arc assembly by the user to fit adding yet more deviations, etc. They are simply tuned towards a different target that is more coloured but not necessarily "inferior sound" to the Harman target.
Just seems best to just let these play music how they like it: soft, weighty, soothing, fatigue-free, liquid vocals, diffused depth and imaging, etc.
Then there is also the matter on perceived changes in sound signature with electrostatics at differing volume levels.
There is no compensation for that, and I listen at different volumes depending on the headphones, and I feel that this becomes more uneven after EQ is applied.
Works ok on the L300LE though, decent improvement, but still don't think the sound is suited to my taste.
Surprisingly, the headphone where this EQ is most effective is the Lambda Pro (I had multiple Lambda Pros and I noticed excellent consistency between them, more so than with other vintage Staxes) but I feel that even KGSSHV runs out of steam a bit, so there is not quite enough heft to the sound. (The Lambda Pro is not as easy to drive as you might think). But as-is, it sounds really good overall.
Lambda Pro vs L300LE with EQ applied:
- L300LE has superior impact, speed, detail, imaging, and it is easier to drive.
- Lambda Pro has better transients, deeper bass, more dynamic and relaxed.
If I take the EQ off, the original tonality comes back, but there is less strain on the system, dynamics coming back. There is no free lunch.