SPECTRUM ROAD Jack Bruce and friends pay tribute to one of fusion’s founding fathers    The word “supergroup” gets tossed around a lot, but Spectrum Road makes an impressive case for itself. Each member of the quartet comes with a wildly impressive résumé. Guitarist Vernon Reid is the prime mover behind Living Colour, the juggernaut that helped define rock-funk in the ’80s. Keyboardist John Medeski, one-third of Medeski Martin &... 

SPECTRUM ROAD Spectrum Road [Palmetto] “Supergroup” is a term that was long ago diluted, but every once in a while the stars align and the word regains its meaning. Spectrum Road is incontestably a supergroup: Cream bassist Jack Bruce; Living Colour guitarist Vernon Reid; keyboardist John Medeski of Medeski Martin & Wood; and drummer Cindy Blackman, who has backed husband Carlos Santana, Lenny Kravitz and others. Spectrum Road—and the quartet’s...