The Moments, Delfonics and Harold Melvin & the Blue Notes were three of the best vocal harmony soul groups of the early '70s. Ten years have passed and some of the names have changed, but those three groups arrived at the Warner Theatre last night with their clockwork harmonies and romantic pleas intact.

Due to legal problems, the Moments have changed their name to Ray, Goodman & Brown. With Harry Ray's strong tenor threading together Al Goodman's booming bass and Billy Brown's fluttering falsetto, the trio brought street corner doo-wops to certain passages and penthouse polish to others. They brought a lush blend to their 1970 hit, "Love On a Two Way Street," as well as last year's "Special Lady."

Harold Melvin & the Blue Notes lost lead singer Teddy Pendergrass in 1976, but have gained another one just as talented in David Ebo., Ebo has a rumbling, bellowing southern gospel voice that contrasts nicely with the silky smooth Philadelphia soul of Melvin and the three other Blue Notes on old favorites like "Wake Up Everybody" and "I Should Be Your Lover."

Two-thirds of the original Delfonics are still around in the brother team of William and Wilbur Hart. Their falsetto harmonies aren't as strong as they once were but are just as sweet, especially on the unforgettable "La La Means I Love You." The evening's only weak points were a long, awkward opening set by a new soul group, Baby Waldo, and a sexist, unfunny comedy routine by Catfish Mayfield.