Well I never thought I would get going on these MK2 again any time soon.
My set here is quite heavily modded and slightly complex in the materials used - strategic hole punching of the memfoam pads over certain grids, AngelHair, Arctic Cotton material, Sorbothane all over the face of the baffle etc.
The one thing I did since my last update was go in and increase the bass levels and extension
again.
It has definitely worked.
Even running off of a Zishan DSD DAP ( with the full on 15 volt upgrade mod ) one would think there is a bass booster on compared to the previous mod.
The previous mod entirely removed the rear white damping from behind 2 of the larger driver grid areas.
I have now fully removed that white damping paper from
the entire middle strip of 3 grid squares, all of them are the larger grids with more of the metal flux plate holes beneath them.
*Levels are way up.
*Quality stays very similar since these last grids now exposed on each driver rear are still somewhat damped.
* very much
extended reach as well
= It so happens that I had hole punched the memfoam discs directly above that spot for the previous mod, and this is the only vent hole there that the grid can vent from as the memfoam is all pressed down directly on the driver rears.
Obviously it is restricted in size still due to the hole punched in the memfoam being much smaller than the now exposed grid area.
Additionally there is an Arctic Cotton damping square frame whose edges fill that spot too.
So basic impressions are that the levels are wayyy up.
Quality is similar, but slightly
slightly looser overall so there is some more all encompassing low end ( previous mod seemed solid but slightly tight still ).
So this new mod might be a bit more realistic sounding in comparison to that previous mod's tighter effect on the low end.
There's definitely additional spaciousness and
it is very easy to detect that increased air effect ( these were already sounding quite on the open side ).
It's quite a large more expansive type of sound here now.
I might go back in and replace the punched plug from that memfoam at that exact spot to see what happens. I suspect it will tighten things up but just how much , no idea.
One totally bothersome thing about this series of cans is the driver variations, both between sets and as I have seen mentioned a few places also within individual pairs.
Mine are the peakier version
, yet the one I did for waynesworld are obviously less so.
I even saw this mentioned on the Russian sites.
The earlier production the less peaky, or so it is said.
I honestly cannot recall what was figured out for possibly identifying them by checking the transparency/opaqueness of the stock white rear driver damping ???
Have another set here that has been sitting half done using some rear cup filler that dries to a semi-hard acrylic with pumice pieces embedded within it all.
An art store product.
*** I did omit a total sealing of the baffle to cup seam this time around, guess I will tackle that first before replacing memfoam plugs.
here we go again.
Update to this post #1
So
keeping the baffle to cup perimeter unsealed ( no tightly stretched electrical tape ) took a very very slight amount of tizz out of the top end.
Better by a touch but not ideal yet.
Enough to go from sibilant to not quite though.
Was NOT expecting that.
I replayed a particular area in a track a few times prior then right after.
I went in and
replaced the plug hole directly above the newly exposed grid area with a memfoam plug ( had a small bag of them saved )
Spacious expanse dropped back a bit to a lower vastness.
Still pretty good stuff though, there's enough of that feeling left without going overboard.
Some vocals that were pushed back into that expansiveness emerged a more forward again back to what I would consider more proper.
Low end a touch tighter and still bigger, still reaches very deep.
I did not think there would have been enough of a breathing room along the cup to bafffle perimeter to have done much, but it did drop off that edgy tizz slightly which did show at times.
it's right on the edge instead of barely over the top now.
yeah sorry about rambling.
I forgot how such small things can affect the overall sound, even if it is a subtle mod change. ( but this low end is not subtle now ).
I hope there are no more updates
Update #2
Had to replace another memfoam plug, this time over an intact grid. Improvement in vocal range forwardness..
Total of 2 memfoam pad holes on each driver replugged.
This will likely interest maybe 1/2 a member here. If that.