Meet the Heresy IV

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.

Highlights & Benefits

• Classic Heritage sound — a compact three-way format with horn-loaded midrange and tweeter gives the speaker exceptional dynamics, immediacy, and efficiency.
• Deeper bass than previous generations — for the first time in the model’s history, the Heresy adds a rear port, improving low-frequency extension and overall fullness.
• Modern driver upgrades — the K-702 midrange compression driver and K-107-TI titanium diaphragm tweeter are designed to improve detail, coverage, and tonal refinement.
• High-sensitivity performance — the design is easy to drive and particularly appealing for listeners using lower-powered tube amplifiers or refined low-to-moderate power solid-state amplification.
• Furniture-grade finish — book-matched real wood veneers and handcrafted Heritage construction give the speaker visual presence to match its sonic character.
• Authentic live-feel presentation — the Klipsch Heresy IV 3-Way 12” Horn-Loaded Loud-speaker (pair) is ideal for systems built around dynamics, scale, and a highly engaging, room-filling presentation.

Technology & Design

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.

Why Buy From Us

• Expert guidance on matching Heritage speakers with the right tube or solid-state electronics
• Help comparing Klipsch Heritage models for room size, taste, and system goals
• Support from a specialty audio retailer focused on real-world synergy and long-term satisfaction
• Trusted advice for building a higher-performance two-channel system with authentic personality

Related & System Matches

• Tube amplifiers and integrated amps that benefit from high-efficiency loudspeakers
• Analog and digital front ends built for dynamic, emotionally engaging playback
• Other Klipsch Heritage Series components for listeners exploring the full lineup