TKoP said:
Also, how often do you need to replace them?
This is taking me back a long long time, but here's a few pointers related to the question (disclaimer: these apply to all "regular" turntables / cartridges, and may not to some of those fancy schmancy esotrekker ones):
1. Keep your vinyl immaculately clean with a proper brush. (I like the Discwasher system). This will extend both the stylus and the vinyl's life. I suggest a Zerostat gun to help reduce dust attraction to the grooves after every cleaning. (And by the way, they didn't name a turntable's "dustcover" for nothing!) Store your records properly to prevent warping - which will increase wear.
2. Make sure the catridge / tonearm are properly aligned according to OEM specs. Out-of-alignment will result in faster wear / more damage - not to mention degraded sound. Make sure the turntable's base is perfectly level as well.
3. Use a proper gauge / balance to set the stylus force. Too much will result in higher wear; too little will result in mistracking and damage to the record's grooves. I like the Shure SFG-2 stylus tracking force gauge.
4. Clean the needle regularly with a proper tool / fluid designed for that purpose. Mine's so old that I don't know who made it (Discwasher - perhaps) but there's a bunch of different ones available. Remember to clean only from back to front to avoid damaging the stylus / cartridge.
5. Adjust the tonearm's anti-skating properly to the given stylus forcet. Take into account any special instructions that come with cartridges with built-in groove brushes. Again, when not correct, both the stylus and record grooves can wear unevenly.
6. If all of this has been done and it sounds like the stylus is worn, then it's too late - you're already causing damage to the grooves!
7. But better late than never - change the stylus. "How often" you asked (thought I'd never get to the point?) I always erred on the safe side and did so every few hundred hours. A stylus is relatively cheap. Damaged grooves never heal. (And yes they do wear a bit every time they are played regardless.)
Of course the best answer is ... never. Hopefully by the time the stylus needs changing you'll come to your senses and drop vinyl altogether. :happy-smileygiantred:
Jeff