I play a Spector ns4crfm and the bridge pickup is very weak. It is an emg p/j style with an active preamplifier. The pickups are active as well. I want to change it out to something punchy and clean, and maybe something like 70s jazz tone. I don't want to do much work. And I don't want to change the preamplifier either because I like the emg tone and neck pickup. Any suggestions?