Available finishes include satin black ash, natural cherry, distressed oak, or American walnut wood. The MDF cabinet feels a bit thinner than I expected, it is soft to the touch and seems to mark quite easily and I am a bit concerned about long-term wear. These speakers are substantial and weigh in at a hefty 20.4kg each. The rear port extends the low-end frequency response Quality This new design arrangement claims to extend the low-end frequency range down to 48Hz – making the full frequency range a claimed 48Hz to 20kHz. For the first time in the Heresy range, this updated version features a rear-firing bass port utilising the same Tractrix geometry.
HERETIC II SOURCE PORT DRIVER
Completing this driver array, an imposingly large 30.5cm K-28-E fibre-composite cone woofer handles the low frequencies. The thinking behind this Tractrix geometry is to reduce air turbulence as it enters the port, delivering sound more efficiently. The 4.45cm K-702 midrange compression driver, featuring a polyimide diaphragm is ‘mated’ to a Tractrix horn designed to throw the sound far and wide. A K-107-TI titanium diaphragm handles higher frequencies and is fitted with a phase plug to increase the sound dispersion.
The Klipsch Heresy IV is a three-way configuration. This was deemed to be a design ‘heresy’ for the brand and the name stuck. Still going strong and retaining its heritage from Hope, Arkansas, the original Heresy got its name because Klipsch demanded a compact centre speaker be built to accompany a pair of Klipschorn floorstanders in a three-speaker stereo array. The Klipsch’s Heresy IV floortstanding loudspeaker hails from an original 1957 design made by company founder Paul W. Klipsch Heresy IV without the front grille showing the Tractrix horns