I preface all of this by warning that driver variance, differences in mics,couplers, correction curves, and software exist. My measurements are only useful relative to each other.
Shout out to cskippy for having the gumption to tear into this first and light a fire under my ass to build a measuring rig and see what could be done.
I thought I would give some info and measurements on the mods I settled on for M1060. All measurments preformed today on the same system at the same volume, and as close to the same coupler position as possible.
Mods Measurements:
Purple=Stock
Green=Vegan Only
Gold=cskippy Mods
Red=My Current Mods
My main goals in "Fixing" the M1060 were to lessen the 4.5khz spike/ringing that I found offensive and even out+raise treble if possible. In the end vs cksippy's mod in my measurements I ended up with a few areas worth looking at. First I maintained a bit more energy through the 200-500hz range which is a critical region for vocals, I find versus cskippys mod vocal are a bit more forward in the mix. Second, my slope from 1khz is a bit more drastic, I'm not entirely sure if this is preferable, but it resulted in the most blunting of the 4.5khz spike/ringing I've measured. Finally by using the stock foam as a ear-side filter I managed to create a very flat elevated ridge in the critical 6-10khz treble region, this was goal in trying to get this driver to behave close to the early measurement I've looked at with LCD3 prefazor, cskippy's mods give a bit more sparkle here but measure more jagged through the treble region on my rig. Combined with my more aggressive slope from 1khz my mod sounds a bit more forward than cskippy's to my ears. The final rise to 20khz remains similar on both mods, and I don't hear much of difference there. Eventually I need to get my hands on some different density foams to try and see what effect this has as a ear-side filter.
Paper Towel vs 2ply and stack position Measurements:
Higher Purple=Stock
Green=3"Paper Towel under grill
Blue=3"Paper Towel under felt disc
Lower Purple=3" 2ply under felt disc
Red=3" 2ply under grill(Final Mod)
Not much to say on this section the largest ares of difference I find with the papers and position is it's effect on 100-500hz, 3" of 2ply directly under the grill seems to give the flattest response in my measurements. Looks a bit silly, but it sounds the best to my ears.
-35db 5ms Waterfalls:
Stock:
Nasty Spike and ringing behavior preceding the orthowall at 4.5khz, lots of high treble nulls, I do not like this can stock.
Vegan:
Some lesson of spike/ring behavior, overall treble smoothing, more gradual slope from 1khz.
cskippy:
A bit smoother treble, and a bit broader over all treble energy in the 6-10khz range.
Final Mod:
Significant measurable reducing in ringing, further blunting of the 4.5khz spike, near flat 6-10khz treble ridge.
Spectral Decay:
Stock:
cskippy:
Final Mod:
Pictures on what I did to follow in next post.