[sdiy] Opamp ICs (slightly OT)

[Robotboy8 at aol.com]

I'm tentatively working on a fretless 2-string drone bass guitar (not a 
synth... but i might add a lowpass filter whose cutoff is controlled by a ribbon 
controller under the fretboard).  I'm planning on not using a standard pickup 
but instead on using the strings as pickup with a strong magnet (from a car 
speaker) beneath them.  I do not know, however, whether the signal attained this 
way will be strong enough without using a magnet so strong that the strings 
tend to stop vibrating rather quickly (undesirable, as I intend this for drone 
use).  I'm thinking that I'll put an opamp IC right before the output (ratshack 
seems to have some for relatively cheap, if i recall correctly).  I've not 
used many ICs before, though, so can anyone recommend one for this use and 
explain where to connect which pins (okay, my rather incredible newbiness shows 
itself...)  Am I correct in assuming that I need basically just the + and - 
connections from the string and the + and - connections from the powersource (in 
this case batteries)?  Or are there many other connections to make (possibly a 
ground... any others?)

Also, does this make any sense?  Will the output voltage just be too low for 
suitable audio use?  Or will I not need an opamp anyway?

Thanks in advance
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