The Klipsch Heresy IV is the most compact and approachable floorstanding loudspeaker in the Heritage series. Its low, angled cabinet delivers the speed and directness of horn-loaded midrange and treble with a 12-inch woofer, while the fourth-generation rear Tractrix port extends bass response and improves overall balance. High sensitivity makes the Heresy IV an inviting partner for lower-powered tube amplifiers as well as modern solid-state systems.