4 String SG
 

I have a new Gibson SG, and would like to switch out the factory strings for something better. If I want a really fat, heavy sound. What should I use? I have heard good things about GHS Boomers. Do they work? Should I use something else? What about string gauge?

Try Nikki Sixx Dean Markely Helix strings. I use 'em on all my Gibsons. They last a long time and sound heavy, deep, and punchy. 110-50.

I stopped using GHS after I discovered these strings.

I use LaBella flats on mine.

A fat heavy sound?
GHS Precision flats or Labella 0760M flats.

LaBella flats on my SG gave me the perfect classic 70's rock tone. Thin Lizzy, UFO, Sabbath - just loved 'em.

Also tried D'addario black nylon tapes (nice Beatle's Sgt. Peppers tone) and short scale round wounds by Ken Smith (strong mids with bite - similar to Rotosound 66) and D'addario XL-160 nickel rounds (bright at first, but mellow in 12 hours of playing to a nice round tone).

If you need the bass to be versatile and cover a few different genres (rock, metal, blues, jazz, country), then I would recommend the D'addario XL-160. They have the broadest range. But if you just play classic/hard rock, I don't think you can beat the LaBella 760 flats. They are just magical on the SG.