My main gig bass has good mids. So I have a 40CS in the neck to solidify the lows and a 40JX in the bridge to get better highs, wired with an ABX, then to an EXB, then to a MV, then to a MT to temper new strings until they settle in and the new string zing goes away. If you have a bass that is more neutral or has an inherent mid-dip, YMMV.