The longevity of Denon's 103 cartridge series, first introduced in the 1960's and still in production speaks to the design's enduring popularity. The design's weak point is its flimsy mounting system. As my colleague Art Dudley put it in the December 2007 issue of Stereophile: "The most common complaint about the DL-103 is also the truest: Its good motor is compromised by a too-flimsy mounting arrangement, with open-edge bolt channels that prevent the cartridge from being rigidly fastened to a head shell."