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Klipsch updates Heritage speaker range

Heresy IV and Cornwall IV speakers both at Bristol Hi-Fi Show

by Andy Bassett

The Klipsch Heritage Series introduces refreshed and re-voiced versions of the long-standing Heresy and Cornwall speakers with key changes in the design to bring out the best in performance and aesthetic.

Originally designed back in the late 1950s by Paul Klipsch, both the Heresy and Cornwall speakers have been re-worked to advance their legacy sound and update them for modern applications and environments.

Klipsch Heresy IV

The original version of the Heresy was a three-way loudspeaker design that started out as a compact centre channel to accompany the flagship Klipschorn in three-speaker stereo arrays. It gained its nom du Guerre from an off-the-cuff comment Klipsch himself made in response to an accusation that his design was ‘acoustic heresy’.

Marking the entry point into the Heritage Series, the new iteration of the Heresy benefits from a K-107-TI titanium diaphragm high-frequency driver, with an all-new wide-dispersion phase plug, above a new K-702 midrange compression driver, with a polyimide diaphragm mated to a K-704 Tractrix horn. The result is an even, high-frequency dispersion alongside improved detail and dynamics in the midrange, across a wide listening area.

Elsewhere, there’s a 12-inch K-28-E woofer for the bass response and a new high-fidelity crossover network, based on the Klipschorn’s threeway steep-slope design, to improve efficiency and power handling.

The Heresy IV adds a rear port for the first time which adds almost 10Hz of low-frequency extension. The Tractrix geometry the Heresy employs allows for fast and efficient air transfer which reduces port noise thus adding extra punch to low frequencies.
There’s a cabinet redesign so the Heresy IV has a taller and narrower profile compared to its predecessor, as well as an updated grille. Cabinetry is still handcrafted in Hope, Arkansas and each speaker pair has a book-matched wood veneer finish. Finally, the matte black slant-riser base is removable for different installation options in any environment and there’s Audioquest Internal cabling for fidelity and performance.

Technical Data

Frequency Response (± 4dB): 48Hz - 20kHz 
Sensitivity (@ 2.83V / 1m): 99dB (in typical listening room) 
Power Handling (Cont. / Peak): 100W / 400W 
Maximum SPL: 116dB Continuous 
Nominal Impedance: 8Ω Compatible
Crossover Frequency: HF: 4500Hz MF: 850Hz 
High Frequency Driver: K-107-TI 1” Titanium diaphragm compression driver 
Midrange Driver: K-702 1.75” Polyimide diaphragm compression driver 
Low Frequency Driver: K-28-E 12” Fibre-composite cone woofer 
Enclosure Material: MDF with fine veneers 
Inputs: Dual binding posts (bi-wire / bi-amp) 
Dimensions (H x W x D): 630.1 x 393.7 x 336.6mm 
Weight: 20.41kg 
Finishes: Satin Black Ash, American Walnut, Natural Cherry, Distressed Oak


Klipsch Cornwall IV

Taking its name as an amalgam of ‘corner’ and ‘wall’ since the speaker could easily be used in either position, the Cornwall was introduced as a larger, full-range alternative to the Heresy and as such uses a three-way design with horn-loaded compression drivers for the midrange and treble, alongside a direct-radiating 15-inch woofer for the low frequencies.

The Cornwall is the "largest of the compact” Heritage speakers and is second only to the fully horn-loaded Klipschorn and La Scala models for performance.

The Cornwall IV now features a new mid-frequency driver and a new large-format midrange horn with Mumps technology which controls the dispersion of the sound wave for better response throughout the frequency band.

The midrange is supported by Klipsch’s popular K-107-TI 1-inch tweeter and a K-33-E 15-inch Fibre-composite cone woofer for deep bass and a newly voiced cross-over network brings everything together.
Tractrix port technology has been added to ensure that the front-facing port can achieve fast and efficient air transfer which lowers port noise for cleaner punchier low frequencies.

The Cornwall IV cabinet now sports a new logo design grille in keeping with the other Heritage products and there’s a new matte black riser to give a floating appearance.

Finished in one of three book-matched wood veneers, the wiring throughout features Audioquest cables.


Technical Data

Frequency Response (± 4dB): 34Hz - 20kHz 
Sensitivity (@ 2.83V / 1m): 102dB (in typical listening room) 
Power Handling (Cont. / Peak): 100W / 400W 
Maximum SPL: 119dB Continuous 
Nominal Impedance: 8Ω Compatible 
Crossover Frequency: HF: 5000Hz MF: 700Hz 
High Frequency Driver: K-107-TI 1” Titanium diaphragm compression driver 
Midrange Driver: K-702 1.75” Polyimide diaphragm compression driver 
Low Frequency Driver: K-33-E 15” Fibre-composite cone woofer 
Enclosure Material: MDF with fine veneers 
Inputs: Dual binding posts (bi-wire / bi-amp) 
Dimensions (H x W x D): 965.2 x 643 x 394mm 
Weight: 33.1kg 
Finishes: Satin Black Ash, American Walnut, Natural Cherry


The Heresy IV costs £3,500 and is available across the UK now and comes in American Walnut, Natural Cherry and Satin Black Ash finish – with the popular Distressed Oak finish joining the range in spring 2020.

The Cornwall IV will be available in all finishes from February 2020 and costs £6,500.

The Heresy IV and Cornwall IV speakers will both be on display at Bristol Hi-Fi Show 21st - 23rd Feb 2020.

Source: Press release
Image Source: Klipsch
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