Dome tweeters aren't inherently bright and harsh, but many have a resonant peak that's tied to the material used for the dome. Silk and other fabric domes are pretty gentle up there; aluminum ones have a spike at around 30 Khz, which is usually not too noticeable. Some metal domes have damping, such as the cloth-damped Mirage titanium domes.
However, the JM Focal 936 that you have is evidently pretty bright and detailed, for whatever reasons, as dealt with in this Positive Feedback Online review. It's so bright and cutting, the reviewer warns not to toe the speakers in "unless you want a haircut."
Although I mentioned pairing the Zu-103 cart with your Dynavector P-75, the real problem with your tonal balance is your speakers. I've auditioned the mid-line Focals a few times at a local dealer and I always find them too bright and analytical. Maybe you should check around some more forums or talk to a speaker technician to see if there's a good replacement tweeter to calm things down. It might also be helped with a well-placed capacitor or resistor in the crossover to roll off the highs a bit. From your and Positive Feedback's descriptions this sounds more like a wider rising response in the high treble than an out-of-band resonance spike.
Spitty sibilants are the first sign the treble isn't right. In addition to an emphasis at that frequency range, it could also be tweeter overshoot or ringing.
However, the JM Focal 936 that you have is evidently pretty bright and detailed, for whatever reasons, as dealt with in this Positive Feedback Online review. It's so bright and cutting, the reviewer warns not to toe the speakers in "unless you want a haircut."
Although I mentioned pairing the Zu-103 cart with your Dynavector P-75, the real problem with your tonal balance is your speakers. I've auditioned the mid-line Focals a few times at a local dealer and I always find them too bright and analytical. Maybe you should check around some more forums or talk to a speaker technician to see if there's a good replacement tweeter to calm things down. It might also be helped with a well-placed capacitor or resistor in the crossover to roll off the highs a bit. From your and Positive Feedback's descriptions this sounds more like a wider rising response in the high treble than an out-of-band resonance spike.
Spitty sibilants are the first sign the treble isn't right. In addition to an emphasis at that frequency range, it could also be tweeter overshoot or ringing.