You can make your pickup have two different outputs with different frequencies. A tapped pickup can’t give you each string to different channels or amplifier. You would need to have six individual coils for left-right-left etc. A tapped pickup is wound to a desired number of turns or to a desired frequency. The frequency will determine how much bass or treble the pickup will have. Usually less turns on the coil will give you less output but a brighter frequency. The more turns the hotter the output and less treble the pickup will have. Use of preamps and circuits can change the tonal character and output in a pickup.

Each tap in a pickup can be sent to a different channel or amplifier and will need to be wired for the right volume and tone controls and stereo jack if using the tapped signal, including full output from the pickup. Capacitors can be used to reduce brightness in a pickup by soldering one side to ground and the other to the hot output.

Putting a capacitor in series with the hot output of a pickup will give the pickup a unique tone. This is a circuit I used when working with Jerry Donahue and his signature Telecaster. Using .0033 mfd. capacitor in series with your hot output from your bass pickup will give you a sound similar to a Rickenbacker trademarked by Chris Squire in the group “Yes.”