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Turntable sibilance

First of two queries by me today....

I have a VPI Classic 3 with Soundsmith Zephyr (original) cartridge and MMMicroOne speakers (just upgraded significantly (I hope!) to Sonus Faber Olympica III’s, which I received today but haven’t yet plugged in). While listening last night, I noticed some audible sibilance (hissy S’es) on vocals. Never noticed that before. If it had been occurring before, I probably would have noticed: turns out I’m fairly sensitive to sibilance, I guess...

I noticed it when listening to multiple "reference" records, all of which are well cared for and good pressings. It’s still minor, but is noticeable. It is not limited to the inner grooves.

From reviewing various past threads here, I gather there could be several culprits: a worn stylus, or incorrect VTF or VTA. As to the latter two: Can those "drift" over time on a VPI Classic 3? I ask because if the problem was the VTF or VTA, the sibilance would not have appeared spontaneously last night, but would have been there from setup. Once I initially set VTF and VTF, I have not changed them and the screws are locked down tight. I do not have any anti-skate on, per VPI’s recommendation (I realize that many disagree with that recommendation, but it’s been working fine for me til now; in addition, as noted above, the sibilance is not limited to the inner grooves.

As to the former: I bought the cartridge used here on Audiogon, but it had had a "complete rebuild" by Soundsmith. I bought it about 18 months ago, but have only put about 1000 hours on it. (If I’m lucky, I get to listen about an hour or two per day. Taking 2 hours daily 7 days a week for 18 months = 1095 hours at the absolute most, and realistically, it’s probably less than that since I don’t always get two hours of listening every single day). I’ve read that a good cartridge should go about 2000 hours before any noticeable wear.

I realize that the easy solution is to dismount the cartridge and send it to Soundsmith to check. Before doing so, I will re-check VTA and VTF. Any other advice is appreciated. I’d hate to have the cartridge out of service for several weeks, having just gotten new speakers.

Thanks!

chipcarterdc

Showing 1 response by bcowen

bcowen
68 posts
 
Just combining a little info here, am I correct that you've had the 'table set up (without touching any adjustments) for over 18 months? If so, I'd go back and recheck *everything*, as in that amount of time a LOT of things can change.  I'd start by re-checking the level of the 'table.  Floors move, footers can become more/less compliant and change height, racks can settle, etc etc.  Then I'd check VTF.  Vibrations can alter the settings, even atmospheric changes can affect it.  Check the azimuth.  Check the VTA -- while the setting may not have moved mechanically, the cartridge's suspension has likely changed at least a little.  Clean the electrical connections (ie: rca jacks/plugs, DIN) -- sometimes a dirty contact will manifest itself most in that sibilance frequency range.  I won't mention antiskate -- if you haven't been using it all along and had no sibilance issues, continuing to *not* use it didn't suddenly cause the sibilance to appear. :)  Finally, although I'm sure you clean your stylus on a regular basis, are you sure it's really clean, and there's not some impacted or baked on crud that you can't see?  If you don't have a jeweler's loupe (40x or higher), I'd highly recommend you get one.  Not expensive, and chump change compared to what you've invested in your 'table and cartridge.

I don't get the opportunity for as many playing hours as you do, but I normally go through my whole setup every 6 months or so regardless of the play time.  And I have yet to go through that ritual without finding something that needed an adjustment.  Nothing ever extreme, but the higher the performance level of your setup (and yours is on up there), the more significant even minor setup disparities become audibly.

 
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