I don’t hate them. Base extension is excellent, soundstage and instrumentals separate well.
Just any female ss causes irritation.
I had the same reaction as you. Some vocals were very sibilant or buzzy/digital and I didn’t like that part but loved everything else. So I EQd them semi-aggressively to get all the peaks and valleys closer to the Harman AE curve using an ADI-2 DAC (it only has 5 PEQ filters/bands available though). I also dialed in a Base/Treble setting on the ADI-2 DAC to add a shelf filter on the lower bass.
These settings made the Z1R for me the best sounding headphone I had every listened to.
Obviously my settings may not be to anyones liking, but I just wanted to say, try some EQ (I was a no-DSP purist before the Z1R and just changed cables, tube rolled, opamp rolled, etc. to get the sound I wanted. With the ADI-2 DAC’s DSP abilities, that all changed, and I now really enjoy the stock cables on my Z1Rs.
Here are my PEQ settings (all peak filters) if anyone is interested:
Band1: Gain +1.0, Freq 1.35k, Q 2.7
B2: +4.5, 2.9k, Q 9.9
B3: -7.5, 3.3k, Q 3.3
B4: +8, 4.2k, Q 3.1
B5: -5.5, 10.0k, Q 3.6
Bass/Treble:
Bass: gain +2.0, 85Hz, Q 0.9
Treble: 0/no change
I know some say the Z1R already is a bass-heavy can, but I’m a bit of a basshead
edit: attached pic of PEQ curve on ADI-2 DAC’s display.