The Klipsch Heresy IV has received considerable attention from professional reviewers since its introduction in 2020. Dating back to 1957, its design has evolved to meet modern audio standards while retaining its classic charm.
According to a review by What Hi-Fi? the Heresy IV is praised for its vivid and dynamic sound reproduction. The speaker offers a wide soundstage and impressive presence, resulting in an immersive listening experience. The addition of a rear port in this model has improved bass response, making the low frequencies tighter and faster, with less port noise. This makes the Heresy IV suitable for a variety of music genres and listening environments.
StereoNET International highlights the efficiency of the Heresy IV, with a sensitivity of 99 dB. This means that even low-power amplifiers are capable of delivering powerful and clear sound. The speaker is described as an icon in the audio world, with a large and immersive soundstage that speaks directly to the listener. While some modern designs may offer more nuance, the Heresy IV compensates with its energetic and involving presentation.
LB Tech Reviews notes that the Heresy IV offers a wide soundstage with an impressive presence. The loudspeaker is able to effectively convey the scale and power of music, with a realistic reproduction of percussion and a dynamic nature that appeals to the listener. Although the speaker may initially be perceived as bright, a smoother and more balanced sound reproduction is achieved after a short burn-in period.
Klipsch's official website highlights the handmade quality of the Heresy IV, manufactured in Hope, Arkansas. The addition of a rear port in this model improves low-frequency extension by nearly 10 Hz, resulting in fuller bass response. The speaker uses Tractrix ports with specially designed inner flares to reduce air swirls, resulting in cleaner and more powerful bass performance.
In a video review by Cheap Audio Man, the Heresy IV is praised for its lively and dynamic sound reproduction. The reviewer highlights the speaker's efficiency and its ability to reproduce a wide range of music genres with energy and precision. The build quality and classic design are also cited as strengths.
