Like the original single-coil soapbar design, the DiMarzio DP164 Deluxe 90 Soapbar Pickup has a unique sonic character. Some players consider Soapbars to be the best-sounding pickup ever made. Low notes were solid and not tubby; they had an almost piano tone quality. High notes were incredibly fat, all the way up the neck. DiMarzio thought it would be even cooler if it were humbucking. Much research and a patent application later, here it is, with the added ability to adjust the patented dual resonance coils for bass and treble balance, and four-conductor cable for coil-splitting and parallel sounds.
This is a very even-tempered pickup, with a fairly uniform frequency response, so it has a very round tone in the neck position and more biting bridge sound. Some of the very oldest single-coil soapbars had a very smooth treble roll off over 2500 cycles - that's why harmonics sounded so fat coming off of these pickups, and it's one of the things built into the DLX 90.