Three suggestions, with apologies in advance if you've already tried them:
1) VTF and SRA adjustment (both are very critical with a ZYX)
2) Graham damping fluid adjustment (also critical, read SirSpeedy's thread on this topic if you haven't)
3) Try a lower impedance load
The one time I tried an Airy 3-X-SB on a Graham 2.2 it was also a touch bright. All attempts to tame it failed unless we went so far that HF musical content was lost. There was no happy medium.
It's possible these two components are not the best match, as I hypothesized in my Airy 2/3 review last year. The Airy 2 and UNIverse have no problems on the Graham IME.
Sorry, I haven't heard an XV-1S, though I'd certainly like to.
1) VTF and SRA adjustment (both are very critical with a ZYX)
2) Graham damping fluid adjustment (also critical, read SirSpeedy's thread on this topic if you haven't)
3) Try a lower impedance load
The one time I tried an Airy 3-X-SB on a Graham 2.2 it was also a touch bright. All attempts to tame it failed unless we went so far that HF musical content was lost. There was no happy medium.
It's possible these two components are not the best match, as I hypothesized in my Airy 2/3 review last year. The Airy 2 and UNIverse have no problems on the Graham IME.
Sorry, I haven't heard an XV-1S, though I'd certainly like to.