After you EQ the MG6pro, how would you say it compares to the Merlin in technical ability? Also, from the impressions you've written, you said the Merlin has 'tighter' bass than the MG6pro, and the AS-2 'tighter still'. I wonder how does this affect the impact and rumble of the bass?
In terms of that echoey harshness effect, are you able to replicate that sound by EQing up those frequencies in other earphones?
I've boosted those ranges on other IEMs and while it can reproduce the harshness, it doesn't reproduce the echoey nature I hear in the mg6pro, so there must be a correlation between the frequency peaks and the chamber the acrylic shell creates.
As to bass rumble, I don't think it gets any bigger than the mg6pro. It should fulfill all bass head dreams with a disco club like boom. The full custom as-2 will have adjustable bass vents, so I'm not sure how big its rumble will get in comparison until mine arrive. The prototype didn't have this feature. I prefer a tighter/faster, more articulate sub bass but I get the appeal- it's fun.
Ultimately the mg6pro is just not very satisfying for me with or without EQ and surely wish my money would have gone towards better spent purchases for preferences.
Also- one note on reshells: The Future Sonics line cannot be reshelled for resale, only for warranty refit, as the adhesive used to secure it will destroy the driver upon removal. This was confirmed with FS and several reshellers, so it is a permanent purchase.
Edited by shotgunshane - 10/29/12 at 1:02pm