Klipsch Heresy IV Loudspeaker (each)

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  • Regular price $1,599.00 USD

Klipsch Heresy IV Loudspeaker (each)

Must be purchased in pairs. 

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 IV offers unparalleled sound quality from a relatively small speaker.


  • All-new K-702 midrange compression driver, featuring a polyimide diaphragm, for exceptional detail
  • 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
  • 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
  • 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 Black Ash, Natural Cherry, Distressed Oak, or American Walnut wood veneer finish
  • Designed and assembled in the USA
  • Comes with a 10-year warranty

Upgrades from Heresy III

  • Wide dispersion HF phase plug versus the old standard one
  • K-702 polyimide diaphragm compression driver offers better clarity and dynamics, and is larger than the outgoing K-53 titanium driver
  • Modified Tractrix horn with Mumps technology for a smoother response, and better coverage over the K-701 horn
  • Steep-slope network with internal AudioQuest wiring
  • Now with a port. The Tractrix port offers tighter and faster low frequencies
  • Cosmetic upgrades include a scripted logo badge, brushed aluminum input panel, salt-and-pepper grille cloth, and improved finishes


Frequency Response (+/- 4 dB): 48-20,000 Hz

Sensitivity:  99 dB

Nominal Impedance: 8 ohm

Crossover Frequencies: 4,500 Hz, 850 Hz

HF Driver: K-107-TI 1” titanium diaphragm compression

MF Driver: K-702 1.75” polyimide diaphragm compression 

LF Driver: K-28-E 12” fiber-composite cone woofer

Enclosure Material: MDF

Inputs: Dual binding posts / bi-wire / bi-amp

Dimensions (WHD): 15.5" x 24.81" x 13.25"

Weight: 45 lb