KLIPSCH
Klipsch Heresy IV 3-Way 12” Horn-Loaded Loud-speaker (pair)
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
Sold as a Pair
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.
3-Way Design
12" Woofer
Horn-Loaded Mid / High
Rear Tractrix® Port
Heritage Series
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
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Classic Heritage sound — a compact three-way format with horn-loaded midrange and tweeter gives the speaker exceptional dynamics, immediacy, and efficiency.
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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.
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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.
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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.
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Furniture-grade finish — book-matched real wood veneers and handcrafted Heritage construction give the speaker visual presence to match its sonic character.
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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.
FAQ — Heresy IV
What makes the Heresy IV different from earlier Heresy models?
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.
Is this a true horn speaker?
Yes. It uses horn-loaded midrange and high-frequency drivers, paired with a direct-radiating 12" woofer.
What kind of amplifier works well with it?
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.
Is it sold as a single speaker or a pair?
This listing is for a pair.
Who is this speaker best for?
It is a strong fit for listeners who want Heritage styling, high efficiency, and a dynamic, engaging presentation that feels closer to live music.
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
