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Pickup Foam

bhubb3rd

bhubb3rd

May 27, 2006
454
60
Bradenton, FL
#1
Guys - what kind of foam are you using under your replacement pickups and where are you getting it?

I have a couple of basses that are going to be getting new pickups and the foam in the basses now is compressed and the pickups won't adjust up, there is no "spring" left.

Any help / suggestions will be appreciated!

Thanks.
 
#5
I iether use the foam the pickups are wrapped in or I go to a place like "Michaels" crafts and buy high density craft foam. Also as stated above, weather stripping works good too. You can roll it how ever thick you need it. I hate the springs because they give to much for my style ( I am told I am slightly too aggresive) of playing so the pickups are always being shoved in to the body and changing the pickup height.
 
#11
Toastfuzz said:
I replaced my foam with cardboard, which leads me to believe you can use just about anything.
Click to expand...

Cardboard will work, but you can't use "anything"! The problem with cardboard or many types of foam is that it doesn't compress easily. This means that if you want to adjust the pickup height you'll ALSO have to adjust the amount of foam under the pickup. In fact this tends to be true with most foams that don't compress well. And there's more. Urethane foams (which are the common type you can find everywhere) tend to self-destruct after a couple of years. That means eventually the pickup gets loose, the foam gets crumbly, and you have to put new foam in. Hence there are only TWO types of foam that I've found work decently. One is real rubber foam. You usually buy it on a roll as weather stripping. It's about 1/2" wide and black. The gray stuff is softer and polyurethane. You don't want that. The other decent foam is polyethylene foam. It's commonly used for packing in shipping. It's white and compresses harder than rubber, but has the advantage of being excellent at damping vibrations so works very well under a pickup.

The other choice is springs. BUT, understand that spring are steel and when they vibrate the pickup will pick that up. So IF you use springs you need to test the pickup for microphonics. Take all the strings off the bass. And then tap on the pickup with something non-metallic. You should NOT be hearing any noises in the amp. If you hear boing-boing that is the springs. The way you fix this is to cut a rectangle of polyethylene foam so that it presses against the springs or punch 4 holes in it so the springs are forced through. That damps all spring vibration. Springs are nicer than foam because they have a lot of compression range which means you can adjust the pickups up and down a good distance without changing foam or anything.

But as I said the true test of your mounting method is to tap on the pickup with no strings on the bass.
 
#13
pickup-foam_large.jpg


Here
 
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#16
Best foam I ever used I got from a package we received in at work. It was something small...computer part or something. Anyway this stuff was awesome, very rubbery, very squishy, and impossible to ever lose it's squishiness because I think it was more rubber than foam. That stuff was perfect but I only got just a little bit of it and haven't found anything better yet.
 

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