Klipsch Heritage Floorstanders Compared: Heresy IV Heritage vs Forte IV Heritage vs Cornwall IV Heritage

Three Generations of the Same Heritage Idea

The Klipsch Heritage line has always been built around a simple, enduring idea: use high efficiency horn loaded drivers so your amplifier does less work and the music comes through with immediacy and ease. The Heresy IV, Forte IV, and Cornwall IV all share that DNA. Each is a three way, horn loaded floorstanding design with a titanium diaphragm compression tweeter and a 1.75 inch titanium diaphragm compression midrange driver on Tractrix horns, housed in a plywood cabinet finished in real wood veneer. What separates them is scale, bass extension, and the physical footprint they ask of your room.

Specifications compared

Because all three are engineered to sing with modest power, choosing between them is less about chasing watts and more about matching the size of the speaker to the size of your space and your appetite for low end. This guide walks through where each model sits in the lineup and which one fits your situation.

The Models Compared

Klipsch Heresy IV Heritage

The Heresy IV is the compact entry point to this trio, though calling it small undersells it. It pairs a 1 inch titanium compression tweeter and 1.75 inch titanium compression midrange with a 12 inch fiber composite woofer, and uses a bass reflex enclosure with a rear firing Tractrix port. Frequency response runs from 48Hz to 20kHz (+/- 3dB) with 99 dB sensitivity into a nominal 8 ohm load. At 24.8 x 15.5 x 13.25 inches (with riser) and 45.3 lbs each, it is the easiest of the three to place and the most room friendly.

Klipsch Forte IV Heritage

The Forte IV sits in the middle of the lineup and takes a different approach to bass. It uses the same 12 inch fiber composite woofer and titanium compression drivers as the Heresy IV, but pairs the woofer with a 15 inch rear firing passive radiator in a sealed enclosure. That extends frequency response down to 38 Hz (+/- 3 dB) while keeping sensitivity at 99 dB into a nominal 8 ohm load. At 36.5 x 16.5 x 13 inches (with riser) and 72 lbs each, it is a proper floorstander that reaches lower than the Heresy without demanding the space of the Cornwall.

Klipsch Cornwall IV Heritage

The Cornwall IV is the largest and most capable member of the group. It moves up to a 15 inch fiber composite cone woofer alongside the 1.75 inch titanium compression midrange and 1 inch titanium compression tweeter, in a bass reflex enclosure using rear firing passive radiators. Frequency response spans 34Hz to 21kHz (+/- 3dB) with a notably high 102 dB sensitivity into a nominal 8 ohm load. At 38.5 x 25.5 x 15.5 inches and 100 lbs each, it is a big speaker that wants a big room to breathe.

Which Should You Buy by Scenario

You Have a Small or Medium Room and Limited Placement Options

Go with the Heresy IV. Its 24.8 x 15.5 x 13.25 inch footprint and 45.3 lbs weight make it the most manageable of the three, and its 48Hz low end reach is well suited to spaces where a larger woofer would overload the room.

You Want Deeper Bass Without a Massive Speaker

Choose the Forte IV. Its 15 inch passive radiator paired with the 12 inch woofer in a sealed enclosure pushes response down to 38 Hz, giving you meaningful low end extension beyond the Heresy IV while staying in a more moderate 36.5 x 16.5 x 13 inch cabinet at 72 lbs.

You Have a Large Room and Want the Fullest Presentation

The Cornwall IV is the answer. Its 15 inch woofer, 34Hz low end, and 102 dB sensitivity deliver the biggest, most effortless sound of the three, and at 38.5 x 25.5 x 15.5 inches and 100 lbs each it has the physical scale to fill a large space.

You Are Running a Low Wattage Tube Amplifier

All three are strong candidates, and the Cornwall IV is the most forgiving. Every model presents a nominal 8 ohm load, and the Heresy IV is noted as suited to low wattage tube and solid state amplifiers thanks to its 99 dB sensitivity, while the Cornwall IV goes even further at 102 dB, meaning it asks the least of a limited power amplifier.

A Note on Matching and the Rest of the System

All three speakers present a nominal 8 ohm load and carry high sensitivity ratings (99 dB for the Heresy IV and Forte IV, 102 dB for the Cornwall IV), so they are happy with low wattage tube and solid state amplifiers as noted for the Heresy IV. Because the Forte IV and Cornwall IV vent through rear firing passive radiators, and the Heresy IV through a rear firing Tractrix port, all three benefit from a little breathing room behind them so the low frequency output can develop properly. Give the larger cabinets more distance from the wall than the compact Heresy IV.

Come Listen at AEA

The best way to choose between the Heresy IV, Forte IV, and Cornwall IV is to hear them in person, and you are welcome to do exactly that at the All Elite Audio showroom in Timonium, Maryland. Demo units rotate, so we recommend reaching out before your visit to confirm which Heritage models are currently set up for listening.