DIMARZIO 206999&nbsp;DP 220FBK D Activator Bridge Guitar Accessories Active humbuckers have a distinctive sound - powerful, clean, open sounding, with excellent harmonic overtones and very tight lows The down side for many players is that they also sound cold, have limited dynamics and run out of headroom when played hard And of course, they need batteries In 2006 DiMarzio took a close look at the most popular active neck and bridge humbuckers to see if they could capture all of the good qualities and eliminate the disadvantages The D Activator neck and bridge models are the result