Re: Alnico 2 vs Ceramic 500k vs 1m?
This is from the Kinman website, on The Perfect Guitar:
"The whole thrust of this article is to dispel the myth perpetuated by some that Ferrite or Samarium Cobalt pickups can duplicate the characteristics that Alnico imparts to the sound.. I am not against other types of pickups that use alternate magnets per se. However it is a fact that Ferrite (Ceramic) magnets play absolutely no part in tone shaping of a guitar pickup simply because they are non-conductive, non-metal magnets and do not influence the electrical behaviour of the coil, and exchanging these with Samarium Cobalt magnets has similar sonic results; in other words these magnets are completely toneless / soundless (ie they play no part in tone shaping in themselves). On the other hand we have Alnico, the magical magnet. Alnico is unique because it imparts a TONE flavour and certain dersirable performance characteristics into the sound. It does this because it is metallic and conductive and does influence the electrical behaviour of the coil. There are those that will tell you that a clever designer of Samarium Cobalt or Ferrite magnet pickup can somehow, miraculously, compensate for the missing Alnico by clever magnetic circuit design, this is simply not so. Magnetism is just magnetism, but ' coil core ' material is a whole different story. Core material and behaviour is one of the BIG subjects that old time Electrical Engineers (not the modern electronic variety of engineer) had to study during their education. You have probably heard about Inductance (measured in Henrys), it's one of the most important and revealing specifications that a guitar pickup possesses. Did you know that Inductance is primarily derived from the core material? Steel had high inductance, Alnico has low inductance, about 1/4 that of steel. Fender sound demands just the right amount of inductance derived from the core.
Hearing is believing: Remember that the Human ear is MOST sensitive in the midrange frequencies, that's no co-incidence because that's where speech frequencies are concentrated. It's significant that hearing loss begins in the upper midrange and is accompanied by loss of clarity and intelligibility. Alnico is the traditional (and preferred) magnet material for Fender pickups because Alnico imparts important detail in the midrange frequencies, in precisely the same range as the human voice and it also imparts a thwack in the low midrange that gives the wound strings a clean metallic cutting edge, a crisp edged bitey twang, crisp (almost metallic/brittle) highs as well as beautifully flavoured complex midrange detail and character. Alnico give the sound an entrancing captivating character, a depth and dimension and the projection to be easily 'heard' in the mix. Alnico is rich in midrange complexity and upper midrange bite and grit that makes playing an interesting, stimulating exciting and deeply satisfying experience.
The differences: You don't have to be an electrical engineer to understand the simple, undeniable, scientific fact that the core of the coil (be they steel alloy poles or Alnico magnets) have a BIG effect on the sonic tonal texture the pickup produces. Alnico also has more upper midrange bite and grit to cut and drive through the mix. For live on stage performances you simply can't beat Alnico for presence, guts and projection. Alnico pickups have remarkable clarity, presence and sparkle.