Klipsch Heresy IV Floorstanding Speaker (Pair)

First introduced in 1957, the Heresy, a three-way design, started out as a compact center channel speaker to accompany the Klipschorn® in three-speaker stereo arrays. The Heresy offers unparalleled sound quality from a relatively small speaker. The Heresy is quite possibly the speaker champion of the world. Whether it's for your burgeoning vinyl collection, home theater or whatever, the Heresy will knock your socks off.

Because of its size, the Heresy offers the greatest degree of placement flexibility in the Heritage series. First introduced in 1957, this three-way horn-loaded loudspeaker is still able to deliver the awe-inspiring Klipsch sound that our fans around the world know and love.

The Klipsch Heresy speaker is a testament to the quality that Klipsch demands from each and every one of its audio products. Remember great sound? We do, too. The Klipsch Heresy enclosure is made in the USA, by proud craftsmen in Hope, Arkansas, just like Paul W. Klipsch (PWK) intended.

The Heresy was originally introduced in 1957 with a compact three-way design utilizing a 12” woofer and horn-loaded midrange and tweeter. In 2006, the Heresy III was upgraded with a more powerful woofer and a bi-wire network as well as midrange and tweeter compression drivers, and features a titanium diaphragm for smooth and accurate definition.

The Heresy IV incorporates an all new K-702 midrange compression driver, featuring a polyimide diaphragm for exceptional detail and dynamics. The K-702 midrange is mated to the K-704 Tractrix® horn, providing you with a wide coverage pattern and smooth response throughout the listening area. The K-107-TI titanium diaphragm high frequency driver features an all new wide dispersion phase plug, providing exceptionally even high frequency dispersion throughout the listening area, making for a wider, more accurate sweet spot.

The Heresy has been completely revoiced from its predecessor, utilizing premium componentry in an all new high-fidelity network — minimizing electrical degradation throughout the circuitry — for truer to life sound with best in class efficiency and power handling. The new network draws from the classic three-way steep slope design of the legendary Klipschorn, La Scala and Cornwall speakers.

For the first time in its long legacy, the Heresy now features a rear port – improving low frequency extension by almost 10Hz, for room filling bass. Utilizing Tractrix geometry, the all new Heresy IV ports allow for the most efficient, fastest air transfer in their class, which reduces port noise for punchier low frequencies. Klipsch Tractrix ports have custom designed inner flares that help reduce air turbulence entering the port. Less turbulent air helps reduce port noise for cleaner, more powerful bass.

The Heresy’s premium, aluminum input panel accommodates large, high-quality speaker cables. Strong, versatile and quality binding posts provide the capability for bi-wiring or bi-amping.

Nothing in the industry sounds as big or is as efficient as the Heresy, given its relatively compact size. This model offers the greatest degree of placement flexibility of the Heritage series. The bonus slant riser base can be removed for cabinet installations.

Every pair of Heritage series loudspeakers is grain-matched, using wood veneer panels that come from the same timber. Each cabinet is carefully matched so that each speaker in the pair is practically indistinguishable from the other. The speakers move seamlessly together through the factory, and each finished product is inspected and labeled with sequential serial numbers, ensuring that your Heritage series speakers leave the factory as a meticulously crafted set.

Klipsch only uses book-matched wood veneers for the Heritage series. The veneer leaves are kept in order as they are delicately sliced from the timber and precisely arranged to provide a mirror image at the splice joint — like turning the pages of a book. This gives each speaker an aesthetically appealing and consistent appearance that is treasured more than any other cut of wood veneer

While each and every component of the Heresy is built to last. Klipsch has always recognized the unique and critical role of a loudspeaker’s cabinet in the sound reproduction process. From the craftsmen in Hope, AR to the engineers in Indianapolis, IN, Klipsch has always put an extraordinary emphasis on cabinet design. The Heresy enclosure is assembled using only the highest-grade adhesives and fasteners. The riser base can be removed for cabinet installation or placement on optional stands.

• All-new K-702 midrange compression driver, featuring a polyimide diaphragm, for exceptional detail
  
• For the first time, the Heresy IV features a rear port for the most efficient, fastest air transfer in their class, which reduces port noise for punchier low frequencies
  
• K-702 midrange is mated to the K-704 Tractrix® horn for a wide coverage pattern
  
• K-107-TI titanium diaphragm high-frequency driver with an all-new wide dispersion phase plug for providing exceptionally even high-frequency dispersion
  
• All-new high fidelity network for truer to life sound, best-in-class efficiency, and power handling
  
• Klipsch Tractrix ports have custom-designed inner flares that help reduce air turbulence entering the port. Less turbulent air helps reduce port noise for cleaner, more powerful bass
  
• Available in a high-quality Satin Black Ash, Distressed Oak, or American Walnut wood veneer finish
  
• Designed & assembled in the USA

• FREQUENCY RESPONSE 48-20k +/-4dB
• SENSITIVITY 99dB @ 2.83V / 1m
• POWER HANDLING (CONT/PEAK) 100W / 400W
• MAXIMUM SPL 116dB Continuous
• NOMINAL IMPEDANCE 8 ohms Compatible
• CROSSOVER FREQUENCY HF: 4.5kHz MF: 850Hz
• HIGH FREQUENCY DRIVER K-107-TI 1” (2.54cm) Titanium diaphragm compression driver
• MIDRANGE K-702 1.75” (4.45cm) polyimide diaphragm compression driver
• LOW FREQUENCY DRIVER K-28-E 12” (30.48cm) Fiber-composite cone woofer
• ENCLOSURE MATERIAL MDF
• INPUTS Dual binding posts / bi-wire / bi-amp
• HEIGHT 24.81” (63.01cm)
• WIDTH 15.5” (39.37cm)
• DEPTH 13.25” (33.66cm)
• WEIGHT 45lbs (20.41kg)

• Manual
• Datasheet
  

Paul W. Klipsch, inventor, acoustics pioneer and maverick, founded Klipsch Audio with the sole purpose of bringing the power, detail and emotion of the live music experience into his living room. Using highly efficient speaker designs, handcrafted cabinetry and a thirst for real engineering breakthroughs – Klipsch, the great American audio company, was born in Hope, AR. Today, our diverse range of quality audio products includes speakers and headphones for almost any consumer and professional application – including cinema, whole-house, wireless, home theater and portable offerings. Honoring our founder’s legacy, Klipsch continues to be the legendary high-performance brand of choice for audiophiles and aficionados around the world. We are the Keepers of the Sound®.