Klipsch's Heresy line has been around for 50 years, but the Model IV is completely different. Heresy!
Klipsch Heresy IV : Read more
Klipsch Heresy IV : Read more
Its distortion has been reduced because the updates to the midrange driver meant Klipsch engineers could let that driver take over some frequencies previously handed by the tweeter, so they dropped the crossover point between the two by 500Hz (from 5kHz on the Heresy III down to 4.5kHz on the Heresy IV).