You can see those vent holes in this picture.
Could you let me know the Pleather earpads that comes with DT1770 PRO are made of the same material with conventional DT770 Pleather earpads (EDT770S or something) or completely new one?
I'm very happy to hear about DT 1770 PRO debut cos I love my T70 and DT770PRO. 1770 might be "the goal" headphones for me.
I know nothing about Alpha pads, but Brainwavz's HM5 pads will fits your purpose very well.
Those fit with 8.35D's housing perfectly, significantly reduce sound leakage, shut out environmental noises, and lot cheaper.
You can also choose a color variation among black, white, red, red rimmed, and brown.
And GMP 8.35D with Brainwavz HM5 earpads. these are brown version.
So far, the HM5 pads are the best sounding for me among other earpads (Beyer DT770 Pleather pads, J$ lether pads, and Maestro's 41-6050 soft foil) I tried.
The HM5 pads are oval, but fit 8.35D's flanges nicely. isolate very well, and sound leak is dramatically reduced.
These pictures are my recent result of pad rolling for GMP 8.35D.
Earpads are JMoney Audio's leather earpads which I bought for Custom One Pro years before .
So far so good, no treble boost nor base reduction. much wider soundspace.
V200's sound signature is slightly warmer side, but that doesn't effect sibilant headphones because V200 is basically a neutral sounding amplifier. I started to feel my T70s less sibilant after I acquired V800 as a DAC.
The T70 on V200 (considering T70's impedance, V100 will do) + V800 stack is amazing.
they are so lively and smooth and powerful. If you have T70s I fully recommend this setup.
Since I changed My DAC to Violectric V800, The treble spikes of T90s become no problem for me.
I seldom find them to be badly sibilant now and I'm enjoying My T90s much than before.
Very lively, dynamic sounding headphones and I really love those.