Re: Gibson pups
The 490R/498T are good PU's, but like many think, not that good together. The easiest solution is to swap magnets. By putting the A5 in the neck (490R) it makes it come alive & gives it sparkle; otherwise, I find A2 magnets to be too dark, dull & lifeless in neck PU's, at least in my LP's, SG's, and 335's. The neck position is naturally very strong on mids & lows as it is, and A2's are very heavy on mids (with very little treble) so dark plus dark doesn't work so well, unless you have a really bright body wood.
Putting the A2 in the bridge (498T) takes off the shrill high end & smoothes it out nicely. Makes it warm. The bridge position is naturally very sharp & bright, and A5's can make it too bright because they have scooped mids. An A2 will replace the missing mids & balance the EQ on a bridge PU.
Too many players remove their 490R/498T's & sell them, when in many cases, they could get the sound they want by simply swapping the magnets.