Comparisons inevitably follow when Milt Jackson is heard in a quartet that isn’t the Modern Jazz Quartet, but Quadrant is truly something else. Joe Pass is in the pivotal chair, and his driving attack and assertive spirit create a singular group personality beyond the vibes/guitarist/no-piano mix. Compare Pass’s original “Concorde” to John Lewis’s MJQ standard of the same name for a study in contrast, or hear how instinctively Jackson approaches the “down” medium tempo of “Lady Be Good” in this context. Needless to say, Ray Brown and Mickey Roker prove to be the ideal rhythm section, as Quadrant always pursues the right angle.