:Wreath: said:
it was used on all electric basses back in the 50ties to emulate the sound of a double-bass. eventually, bassists began to take it off as the sound of electric bass became popular but some still use it today because of the vintage feeling
wrong.
it was indeed used as sort of a hand-/thumbrest. the yellow bass mendez plays is a signature series Marcus Miller bass (a famous bass player), and indeed it features a pickup cover over the neck pickup. the cover is not something people put on on any bass, it's usually model-specific. even in the beginning some basses had them and others don't.
it doesn't change the sound in any way, and defintely does NOT make it more double-bass sounding. it doesn't even play more like DB with it on there, DB's dont have them.
now there is one exception: the rickenbacker horseshoe pickup. this is what the fender pu-cover looks like:
compare with a rick 4001 "horseshoe" pickup:
note that the cover doesn't run all the way through on the top, you can see why it is called horseshoe. the "cover" is in fact part of the pickup, the magnetic coils that comprise the pickup run all the way over the strings. also note that the rick cover runs over the bridge pu and not the neck pu.
rickenbacker used these horseshoe pickups on their stringed instruments way before leo fender even knew what a guitar was
they stopped installing them on their bass guitars in '69. modern rick basses have "normal" single-coil pickups and a plastic chrome-looking cap over it.
for both fender and rick basses with pickup covers most players took them off. what most people started to refer to as an ashtray is actually the bridge cover of early telecasters (ok squier JV bad example hehe but you can get the point):
when in the studio they took them off, and when pieces of metal like this lie around the studio and everybody's smoking, take a guess what they will be used for...