Here is my latest My HD800Maxx mod (in blue).
TRUE BASS INCREASE...
Notice where the 20hz db point is, in reference to the 1khz line...
Same amplitude level, not 5db down, as in all other "Sennheiser" iterations (also at least 3db higher than "Drop" HD8XX iteration).
Count the DBs & extension...
A full 10hz frequency extension....
Normalized at the 1khz reference point,
where it should be.
My measurements also have no smoothing, to hide any imperfections, which most fancier graphs do.
So levels of
10hz and lower, are now audible, without any form of artificial EQ.
Also:
Having
the flattest and
most extended trebles, (past 23khz, and extending to 5khz further than the renowned "SDR" mod), translates to a more realistic and critical headphone.
Extension goes hand-in-hand, with speed.
All other graphs have to go
at least 25-30db down, to achieve similar extension! As an example, the HD8XX barely makes it to 18khz at 25db down.
These extended parameters (on both extremes)
serve as proofs to a True driver performance
increase...
Sonic Image Depth & size is also easily extended beyond current Sennheiser iterations, and even the current mods done here.
Getting closer to publically offering.
Currently making the demo unit.
EDIT** Picture above not updated **
Further improvements made. Flatter cleaner lower Spectrum.
Smoother lesser 4k dip.
Sibilance reduction lowering at 9k.
Have to re-upload newer graph.