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Applause Award - stereonet.com
"Close Your Eyes to Feel Like You Are There"
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 sound that Klipsch fans around the world know and love.
The Klipsch Heresy IV speaker is a testament to the quality that Klipsch demands from each and every one of its audio products. Remember great sound? Klipsch does, too. The Klipsch Heresy enclosure is made in the USA, by proud craftsmen in Hope, Arkansas, just like founder Paul W. Klipsch intended.
Award-Winning Performance
There Heresy IV won an Applause Award from stereonet,com. According to reviewer Rafael Todes, "Klipsch’s latest Heresy IV is an iconic loudspeaker, one that has been developed and finessed over many decades. Think of it as the Jack Daniels of the speaker world due to its quality, classic styling and constant presence over such a long time. Many people love the Klipsch sound, and I can see why."
"Also, the way it makes low power amplifiers thrive is something that needs to be heard to be believed – and a huge and oft-overlooked bonus. Properly partnered, this is one hell of a speaker!"
"The Klipsch Heresy IV lives up to the previous models from the Heresy range. It retains the design and sound signature of the iconic series while bringing extra clarity and in the mids and a better response in the lows thanks to its bass-reflex enclosure," reports Valentin Lefort, Le Blog, March 13, 2020. "The lows are deeper, more powerful but remain under control. The Klipsch Heresy IV loudspeaker particularly shines with acoustic recordings and is able to reproduce extremely subtle nuances in voices and instruments. Play a live recording and simply close your eyes to feel like you are there."
"It Makes You Sit Up and Listen"
"Simple to accommodate, and impressively easy to drive, this three-way will bolt on to any amp and make you sit up and listen," reports Mark Craven, Hi-Fi News, December 23, 2020.
"It brings music to life in a style that many rivals don't, and while it looks ol' fashioned, it sounds thoroughly modern… and totally Klipsch," he concludes.
"Simply Amazing"
According to England's What Hi-Fi? magazine, , March 11, 2021, "When it comes to midrange sound, which is where most musical (and vocal) action takes place, the Klipsch Heresy IVs sound simply amazing."
"Listen to any vocalist and you’ll hear not only every syllable of every word they’re singing – and every breath they take (no matter how small) – but also every single inflexion." The magazine also praises the Heresy IV's ability to deliver powerful bass and a wide soundstage.
Compact, Three-Way Loudspeaker with New Midrange Driver
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, plus a titanium diaphragm for smooth and accurate definition.
The new 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.
Premium Network for Best-In-Class Efficiency and Power Handling
The Heresy IV 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.
"These Sound Like a Very Good $5000 Speaker"
"I will say up front that not only are these gorgeous to look at… but they sound like a very good $5000 Audiophile Speaker," notes Steve Huff, stevehuffphoto.com, February 17, 2020.
"BONUS! These can play super low volume and still sound so so good… Want live concert venue type of volume? Crank it up, go ahead. These will rock your head off."
"Our New Reference Speaker"
"Klipsch’s new Heresy IV may look like the Heresy’s of old, but it’s a whole new speaker," remarks ndrew Robinson, therobinsonbrand.com, April 5, 2024. "Redesigned for 2020 with an all-new crossover, improved drivers and a rear-firing bass port, the Heresy IV is a loudspeaker for the ages and likely an instant classic for the US-based brand."
"The Heresy IV has a much more linear response with a more refined top end and bass -the speaker now has bass. The rear firing port allows the Heresy IV to no longer require a subwoofer in small to medium sized rooms… We loved it and have even gone so far as to make it our new reference loudspeaker going forward!"
Tractrix® Ports with fastest Air Transfer in Their Class
For the first time in its long history, 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.
Bi-Amp Input Panel and Binding Posts
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. The quality continues with Audioquest Type 4 with Star-Quad Geometry internal wiring featuring carbon-loaded insulation, nitrogen-injected PE, and solid long-grain copper conductors, ensuring the purest signal transfer from input cup to crossover network to drivers.
High Efficiency
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.
Matched Pairs
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.
Book-Matched Wood Veneer
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.
Built to Last
While each and every component of the Heresy IV 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, Arkansas to the engineers in Indianapolis, 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.
