The D Activator bridge has an enriched harmonic quality and the notes want to sing. Both the D Activator neck and bridge pickups were designed to eliminate the sterile edginess commonly associated with active pickups. The D Activators use coils tuned to different frequencies. The idea is to shift the resonant point of the pickup to the frequencies of the harmonics that you want to accentuate from the guitar.The D Activator bridge pickup is about 25% louder than the D Activator? neck. Since we were developing both pickups from the ground up as a set, we adjusted the volume levels on the pickups so they are balanced. That way when you switch from the neck to the bridge, you don't hear a drop in volume, another common problem with active pickups.