What are your thoughts on this? Any difference?
Congratulations on post number 6000!Sandwiches: better with mayo or mustard?
Pizza: better with pepperoni or sausage?
Guitar Picks: better heavy or medium?
etc etc etc.
I personally think the difference is kind of subtle....more subtle than pepperoni vs sausage. Maybe it takes just a touch of the high end away. One person will think, "less harsh", and the next will think, "sounds dead". Just listen to it both ways and trust your ears.
edit: btw, I just re-read this and it comes off as blowing you off. Not my intent...read it with a smile. It really is 100% personal preference...there's no wrong answer.
The top end roll off is caused by eddy currents generated within the cover from the electrical signal being generated in the coil. A higher wind (thus higher DCR) coil will produce more signal than a lower wind coil (all other things being equal), therefor produce more eddy currents in the cover. A stronger magnet will also produce a stronger electrical signal in the coil than a weaker magnet in the same coil, therefor more eddy currents in the cover. Combine the high turn count and a strong magnet, and you have a recipe for mud city.What exactly is the DCR/cover relationship?
You wouldn't happen to know what magnets and cover were used in a late 60's Gibson humbucker, would you? Any predictions on the level of change if I remove the cover?The subtle-ness is going to vary depending on magnet strength, coils turn count and the type of metal used to make the cover. A brass cover can make low wind alnico 2 or 3 pickups sound warm, but make an alnico 5 pickup with the same coil muddy. Nickel silver will be fairly transparent with just a slight roll off in the top end...
Generally speaking though, the hotter the pickup, both with DCR and Magnet strength, the muddier a cover will make it.
Really? i thought that the edgy currents in the cover were generated by the variable magnetic flied coming from the string
Not sure if this is an urban legend or not, but...Well, there has to be SOME field in the string, because there has to be a current in the string....because it's moving through a magnetic field. That's a changing magnetic field too. I'm sure it's not significant to anything, but I wonder if anyone's ever bothered to measure it, just out of curiosity. I'm sure it must be down in the picoamps...or maybe even less.