Refer to SD tone chart. They rate the pickup according to the level of low, mids and highs. The QP is hugely scooped, lots of bass lots of highs.
Personally I do not like this pickup at all, the tone sounds artificial to my ears.
http://www.seymourduncan.com/comparetones
Love DiMarzio P for hot output and punch, SD SPB-1 for natural sound, SD Antiquity II for overall tone and bass, Aguilar AG-4P60 for warmth and overall balance.
I know that SD says that about the QP but to my ears it's not really that different to other P pickups other than than being rather hot. Lowering the pickup takes care of that if it's too much.
