Eugene Klein:
(born Chaim Witz, Tirat Carmel (Israel), 25 August 1949).
Better known as Gene Simmons, is an Israeli-American rock musician, singer, actor and businessman.

Kiss is a Fourth of July fireworks show with a backbeat.

Simmons does not compare Kiss to a “normal” rock band, but to a spectacle show. A fireworks show on July 4 (Independence Day in the US) symbolizes something big, bombastic, colorful and show-oriented — fire, explosions, lights, spectacle, patriotic revelry. The “backbeat” is the musical term for the characteristic rhythmic accent (usually on beats 2 and 4) that gives rock and pop music its driving energy. With this comparison, Simmons is actually saying: Kiss is not primarily about profound lyrics or virtuoso musicianship, but about entertainment — a visually and sensorially overwhelming show (fire breathing, blood, pyrotechnics, costumes, make-up) that also happens to have rock music as its driving force. In Kiss, music is therefore the rhythmic foundation for a great theatrical experience rather than the main goal in itself.
Author: Gene Simmons, the bassist and co-founder of Kiss.
Origin:
The quote appears in several interviews and quote collections (including AZQuotes, BrainyQuote, and a photography interview by Chris Buck entitled “Uneasy”), but without one specific original interview or exact date being unambiguously cited as the source — it mainly circulates as an isolated, oft-quoted statement of his. In context with Chris Buck, it sits alongside other signature Simmons sayings such as “There’s no message! Kiss is a Fourth of July fireworks show with a backbeat.” — which ties in with his well-known attitude that Kiss is about entertainment, not about a message or deeper artistic pretensions.