Lewm,
It's hard at times to post on A-Gon and be thorough yet brief or concise enough to keep a reader involved. I should have been more specific and mentioned that the sibilance problem (which both Raul and Rudy have addressed) was separate and distinct from the mistracking that I experienced. Could the mistracking have caused the sibilance? Possibly, but I don't think so as the Colibri is so fast and transients so razor sharp that some sibilance is a probably just a by-product of that characteristic.
My Colibri(s) actually mistracked badly. What shocked me about this was that my Grasshopper and BB were excellent trackers notwithstanding the very low recommended VTF of the van Den Hul designs. I ran the Colbris up and down the VTF scale from .6 gms all the way to 2.6 gms in .02 gm increments all to no avail. I guess it's also possible that the cartridges the distributor sent me were never actually adjusted by VDH or were not actual replacements. Maybe the distributor simply kept sending me the same defective cartridge I originally bought. Either way, I ran out of patience (this took over a year to conclude) and went to the XV-1s and never looked back.
It's hard at times to post on A-Gon and be thorough yet brief or concise enough to keep a reader involved. I should have been more specific and mentioned that the sibilance problem (which both Raul and Rudy have addressed) was separate and distinct from the mistracking that I experienced. Could the mistracking have caused the sibilance? Possibly, but I don't think so as the Colibri is so fast and transients so razor sharp that some sibilance is a probably just a by-product of that characteristic.
My Colibri(s) actually mistracked badly. What shocked me about this was that my Grasshopper and BB were excellent trackers notwithstanding the very low recommended VTF of the van Den Hul designs. I ran the Colbris up and down the VTF scale from .6 gms all the way to 2.6 gms in .02 gm increments all to no avail. I guess it's also possible that the cartridges the distributor sent me were never actually adjusted by VDH or were not actual replacements. Maybe the distributor simply kept sending me the same defective cartridge I originally bought. Either way, I ran out of patience (this took over a year to conclude) and went to the XV-1s and never looked back.