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Heritage Series compact three-way loudspeaker • 12" woofer • horn-loaded midrange and tweeter • rear Tractrix® port • book-matched wood veneer • made to deliver high efficiency, dynamic realism, and classic Klipsch presentation
The Klipsch Heresy IV 3-Way 12” Horn-Loaded Loud-speaker (pair) carries forward one of the most iconic names in American hi-fi, blending classic Klipsch Heritage design with meaningful modern refinements. Originally introduced in 1957, the Heresy has long been prized for its compact footprint, explosive dynamics, and unmistakable live-sounding energy. The fourth-generation version adds a rear port for deeper bass extension, new driver updates, and a revised network while preserving the speed, efficiency, and immediacy that define the model.
For listeners who want a speaker with real presence, strong sensitivity, and the unmistakable impact of horn-loaded design, this remains one of the most distinctive choices in premium traditional hi-fi.
Horn-loaded midrange and treble — Klipsch continues to use its long-standing horn principles to improve efficiency, reduce distortion, and direct more acoustic energy toward the listening area with greater control.
Rear Tractrix® port system — the new rear-firing port uses Tractrix geometry and custom internal flaring to help reduce turbulence while producing punchier, more extended low frequencies.
Heritage build approach — designed and assembled in Hope, Arkansas, the Heresy IV uses book-matched wood veneers and a slanted riser base that reinforce both its historic identity and its intended listening geometry.
In a carefully matched system, the Klipsch Heresy IV 3-Way 12” Horn-Loaded Loud-speaker (pair) delivers the kind of immediacy, dynamic realism, and tonal character that have made Klipsch Heritage speakers enduring favorites.
The major change is the addition of a rear port, which improves low-frequency extension, along with updated midrange and tweeter components and a revised network.
Yes. It uses horn-loaded midrange and high-frequency drivers, paired with a direct-radiating 12" woofer.
Because of its high sensitivity, it works very well with a broad range of amplifiers, including lower-powered tube amplifiers and quality solid-state gear.
This listing is for a pair.
It is a strong fit for listeners who want Heritage styling, high efficiency, and a dynamic, engaging presentation that feels closer to live music.
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