Klipsch Heresy IV Heritage Floorstanding Speakers

A true icon of American hi-fi, the Klipsch Heresy IV combines more than six decades of Heritage craftsmanship with modern acoustic engineering to deliver remarkable dynamics, lifelike vocals, and room-friendly versatility.

An Audio Legend Since 1957

Originally introduced in 1957 by Paul W. Klipsch, the Heresy began as a compact center speaker to complement the Klipschorn. It quickly earned its own devoted following and has become one of the longest continuously produced loudspeaker designs in audio history.

The Heresy IV preserves the unmistakable Heritage sound while incorporating meaningful engineering updates that improve bass extension, imaging, and overall musical refinement.

The Most Room-Friendly Heritage Speaker

Among all Klipsch Heritage loudspeakers, the Heresy IV offers the greatest placement flexibility.

Advantages include:

• Compact cabinet
• Easy room integration
• Outstanding efficiency
• Lifelike dynamics
• Classic Heritage styling
• Ideal for small and medium listening rooms

Its relatively small footprint makes it an excellent choice for listeners who want authentic Heritage performance without accommodating the larger Cornwall or Forte models.

Three-Way Heritage Design

The Heresy IV features a classic three-way loudspeaker architecture consisting of:

• 12-inch K-28-E fiber-composite woofer
• K-702 polyimide compression midrange driver
• K-107-TI titanium compression tweeter
• Horn-loaded midrange and tweeter

Together they deliver:

• Exceptional vocal clarity
• Fast transient response
• Low distortion
• Outstanding dynamics
• Natural tonal balance
• High efficiency

 

New Tractrix® Midrange Horn with Mumps™

The Heresy IV introduces an all-new K-704 Tractrix® midrange horn.

Benefits include:

• Wider listening window
• Improved imaging
• More consistent frequency response
• Better vocal realism
• Reduced horn coloration
• Greater detail retrieval

Klipsch's patented Mumps™ technology further improves off-axis response, creating a larger and more consistent sweet spot throughout the room.

Rear Tractrix® Port

For the first time in its history, the Heresy features a rear Tractrix® port.

Advantages include:

• Nearly 10Hz deeper bass extension
• Reduced port noise
• Faster airflow
• Improved low-frequency dynamics
• Cleaner bass response
• Greater overall musical impact

The Tractrix® geometry minimizes turbulence while helping the Heresy IV produce fuller, more authoritative bass than previous generations.

Redesigned Titanium High-Frequency Driver

The K-107-TI titanium compression tweeter incorporates a redesigned wide-dispersion phase plug.

Benefits include:

• Improved treble extension
• Better imaging
• Wider dispersion
• Increased detail
• Lower distortion
• More natural high-frequency presentation

These refinements contribute to a smoother and more spacious listening experience.

New Heritage Crossover Network

The Heresy IV receives an all-new high-fidelity crossover network inspired by Klipsch's larger Heritage speakers.

Benefits include:

• Better driver integration
• Improved phase coherence
• Smoother transitions
• Lower distortion
• More accurate tonal balance
• Enhanced imaging

The redesigned crossover helps create a more seamless and refined presentation while preserving the speaker's legendary dynamics.

Exceptional Efficiency

With 99 dB sensitivity, the Heresy IV delivers impressive output with surprisingly little amplifier power.

Benefits include:

• Massive dynamic range
• Excellent low-volume performance
• Extremely low distortion
• Concert-like realism
• High maximum output
• Compatibility with low-powered amplifiers

Its efficiency makes it equally comfortable with premium tube amplifiers and high-quality solid-state electronics.

Handcrafted in Hope, Arkansas

Every Heresy IV is designed and assembled in Hope, Arkansas.

Features include:

• Book-matched real wood veneers
• Hand assembly
• Precision cabinet construction
• Heritage craftsmanship
• Premium finishes
• 10-year Heritage warranty

Available finishes include:

• American Walnut
• Distressed Oak
• Satin Black Ash

Each stereo pair is carefully matched for grain and finish consistency.

Amplifier Matching

Thanks to its high sensitivity, the Heresy IV pairs beautifully with a wide range of amplifiers.

Many enthusiasts favor pairing the Heresy IV with low-powered tube amplifiers, where its efficiency and lively character create an exceptionally engaging listening experience.

Room Placement

The Heresy IV offers greater placement flexibility than any other Heritage speaker.

For best performance:

• Leave 8–16 inches behind the cabinet for the rear port
• Position on the included riser
• Use moderate toe-in
• Keep speaker spacing symmetrical
• Experiment with wall distance for the best bass balance

Its compact enclosure makes it ideal for smaller listening spaces while still delivering the signature Heritage sound.

Compared to the Forte IV

The Forte IV offers:

• Deeper bass
• 15-inch passive radiator
• Larger soundstage
• Greater maximum output

The Heresy IV provides:

• Smaller footprint
• Easier room placement
• Lower visual impact
• Outstanding efficiency
• Exceptional value

For many music lovers, the Heresy IV represents the perfect entry point into the Heritage Series.

Compared to the Cornwall IV

The Cornwall IV delivers:

• Larger 15-inch woofer
• Greater bass extension
• Bigger presentation
• Higher maximum output

The Heresy IV offers:

• More compact dimensions
• Easier integration into living spaces
• Excellent imaging
• Classic Heritage dynamics
• Lower amplifier requirements

Sound Quality

Listeners consistently describe the Heresy IV as delivering:

• Explosive dynamics
• Lifelike vocals
• Fast, articulate bass
• Outstanding imaging
• Exceptional clarity
• Engaging musical presentation

Its combination of horn-loaded speed and compact dimensions makes it equally enjoyable for intimate acoustic recordings, classic rock, jazz, and large-scale orchestral music. Many owners find its lively presentation addictive, particularly with vinyl and tube amplification.

Compact Heritage Performance Without Compromise

The Klipsch Heresy IV proves that exceptional performance does not require a massive cabinet.

Its upgraded Tractrix® horn, rear Tractrix® port, redesigned crossover, handcrafted American construction, and remarkable efficiency deliver the unmistakable Heritage experience in Klipsch's most room-friendly loudspeaker.

For music lovers seeking authentic Heritage sound in a compact package, the Heresy IV remains one of the finest values in high-end audio.

Key Specifications Block

• Product: Klipsch Heresy IV
• Category: Heritage Floorstanding Loudspeaker
• Design:
  • Three-Way Bass Reflex
• Woofer:
  • 12-Inch K-28-E Fiber-Composite
• Midrange:
  • K-702 Polyimide Compression Driver with K-704 Tractrix® Horn
• Tweeter:
  • K-107-TI Titanium Compression Driver
• Cabinet:
  • Rear Tractrix® Port
• Frequency Response:
  • 48Hz – 20kHz (±4dB)
• Sensitivity:
  • 99 dB
• Nominal Impedance:
  • 8 Ohms
• Power Handling:
  • 100W Continuous / 400W Peak
• Inputs:
  • Dual Binding Posts
  • Bi-Wire/Bi-Amp Compatible
• Construction:
  • Handcrafted in Hope, Arkansas
• Finishes:
  • American Walnut
  • Distressed Oak
  • Satin Black Ash
• Weight:
  • 45 lbs
• Warranty:
  • 10-Year Heritage Warranty

Why Buy From All Elite Audio

All Elite Audio is an authorized Klipsch Heritage dealer specializing in premium two-channel audio systems.

Our team provides expert guidance on Heritage speaker selection, amplifier matching, tube amplifier pairing, room acoustics, speaker placement, and complete stereo system design. We help ensure your Heresy IV speakers deliver the lively, dynamic performance that has made them an icon for more than 65 years.

Call: 443-402-5055

Text: 443-402-5064

Visit: 1921 York Rd, Timonium, MD 21093

FAQ

What is new about the Heresy IV?

The Heresy IV adds a rear Tractrix® port, a new K-702 midrange compression driver with a K-704 Tractrix® horn, an upgraded titanium tweeter, and a redesigned Heritage crossover network for improved bass, imaging, and clarity.

Is the Heresy IV fully horn-loaded?

No. The midrange and tweeter are horn-loaded, while the bass is produced by a 12-inch direct-radiating woofer with a rear Tractrix® port.

Does the Heresy IV require a powerful amplifier?

No. With 99 dB sensitivity, the Heresy IV performs exceptionally well with low-powered tube amplifiers as well as premium solid-state designs.

Does it need a subwoofer?

Many listeners find the Heresy IV satisfying on its own for music. Those seeking the deepest bass for large rooms or home theater may choose to add a subwoofer.

Is the Heresy IV made in the USA?

Yes. Every Heresy IV is designed and assembled in Hope, Arkansas, using premium materials and Heritage Series craftsmanship.

What finishes are available?

The Heresy IV is available in American Walnut, Distressed Oak, and Satin Black Ash finishes.

How does the Heresy IV compare to the Forte IV?

The Forte IV offers deeper bass and a larger presentation, while the Heresy IV provides a smaller footprint, easier placement, and exceptional Heritage performance in compact spaces.

What amplifiers pair best with the Heresy IV?

Excellent partners include McIntosh, Luxman, PrimaLuna, Pass Labs, Accuphase, Hegel, and LEAK amplifiers. Many owners also pair the Heresy IV with low-powered tube amplifiers because of its outstanding efficiency.

Is the Heresy IV good for vinyl?

Yes. Its dynamic presentation, highly efficient design, and natural midrange make it an outstanding choice for vinyl playback, especially when paired with quality tube or Class A/B amplification.

Where can I buy the Klipsch Heresy IV?

You can purchase the Klipsch Heresy IV directly from All Elite Audio.

Call: 443-402-5055

Text: 443-402-5064

Visit: 1921 York Rd, Timonium, MD 21093