The original purpose of pickup covers was to shield them from unwanted noise. By providing shielding for the pickups, the cover has been designed so that the bass doesn’t boom from outside interference. A ground wire was even connected to early basses for this purpose.
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You should not change the audio. You’re too far from the pickup. It causes you to possibly pluck the strings in a different place.
Single coil pickups, however, see reasonable EMI suppression benefits from pickup covers. Perhaps the main purpose of a cartridge cover is to protect the cartridges from environmental damage. Whether you’re jamming in the garage every night or on stage, your pickups might be taking more damage than you think.
What is the purpose of the pickup cover. The primary role of the cover on magnets is protection. If your guitar has covered pickups, you are less likely to damage the magnet’s coils.
Because most new guitars and basses come with a protective sheet of clear plastic covering the pickguard. This film protects the pickguard during shipping and retail display. It is this thin film that is looking worn and faded, not the pickguard itself, and it should be removed.
Use your screwdriver to gently pry the cover away from the base. The only thing holding the cover in place now is the wax, so it should come off fairly smoothly. If you have trouble, try slightly heating the pickup cover with your soldering iron to soften the wax.
In the early fenders, their sole purpose was cosmetic. Someone told me that old pickups didn’t have the plastic covers they have today, so the pickups were pretty ugly. They threw open the cover there to cover up the ugliness of an otherwise good-looking instrument.
It wouldn’t surprise me that builders would make wooden pickup covers a bit thicker than plastic pickup covers, which places the pickup structure farther from the strings and changes the tone. Not from the material (directly), but from the geometry.
Humbucker covers can also affect the pickup’s magnetic field, depending on the material used, which affects the tone. For example, the brightness can be reduced somewhat with chrome, nickel or gold plated covers. Nickel silver covers also tend to have lower capacitance, which can also affect brightness.
Although plastic or wooden covers are not affected by magnetic fields, they still have a small impact on the sound characteristics. Uncovered pickups sound brighter and more open than covered pickups (assuming all other variables are equal: magnet, coil, and physical properties).
Pickup covers can be made in a number of ways: Metal covers can be made, bent and soldered into a desired shape. This happens in particular in the production of prototypes and small series. Metal covers should be made of nickel silver and not brass, aluminum etc.
why? They seal them in epoxy to prevent people from copying their preamp design. With an active pickup, the built-in preamp has the greatest impact on the pickup’s tone, and you don’t want others to copy it. Active strings also have tiny magnets so you can run them really close to the strings.
Here’s why: After a single coil pickup is shielded with copper tape, its top surface – the area with exposed magnets – is left unprotected. This provides an excellent gateway for hum and noise. On a standard Strat or P-90 pickup, the pickup cover protects the windings from physical damage.
Humbuckers have two coils that result in a thicker, deeper, and smoother sound, while single coils are brighter and clearer. Humbuckers are favored by jazz, hard rock, and heavy metal guitarists, while single coils are favored by surf and country guitarists.
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