The Lollar Imperial Humbucker was introduced, as many Cole Clark artists use sound hole pickups with separate outputs leading to a distorted amp. They loop the clean sound and play over the top with a dirt sound. These sound hole pickups are not very good and they are in the wrong place to drive well.
There is enough nickel core in the phosphor bronze strings to work well. There is no microphonic feedback and very little general feedback, not much different to a an average hollow-body electric.