Klipsch Forte IV Heritage Series 3-Way 12" Horn-Loaded Loudspeakers - Pair

$4,998.00 OR

Color: American Walnut - In Stock

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Model: FORTIVAWPR UPC: 743878045765 Item: 3330

Product Information

High Performance Is Their Forte

First introduced in 1985, the Forte quickly established itself as the most popular Klipsch model. The elegant design and outstanding performance made the Forte a standout among its competitors. In 2017, Klipsch re-introduced the Forte as part of the Heritage speaker series. The new Forte IV features updated cosmetics and the latest advancements in acoustic engineering while maintaining the original charisma that made the Forte so popular. 

High Efficiency, High-performance Loudspeaker

The Forte IV hosts a three-way design utilizing a 12” woofer and horn-loaded midrange and tweeter. The Forte IV incorporates an all-new K-702 midrange compression driver, featuring a polyimide diaphragm for exceptional detail and dynamics. The K-702 midrange is mated to a modified Tractrix® horn — featuring our patented mumps technology for even polar response of mid frequencies, giving you more consistent sound throughout the listening area. The titanium diaphragm high-frequency driver has an all-new wide dispersion phase plug for providing exceptionally even high-frequency dispersion for a wider, more accurate sweet spot.

Passive Radiator Yields Full-range Performance

The Forte IV’s well-extended bass is found in the use of a rear-mounted passive radiator. A mammoth 15” (38 cm) in size, this sub-bass radiator operates on acoustic pressure generated by the active woofer for greater bass output and extension.


The Forte IV has been completely revoiced from its predecessor, utilizing premium componentry in an all-new high-fidelity network — minimizing electrical degradation throughout the circuitry — for truer to life sound with best in class efficiency and power handling. The new network draws from the classic three-way steep slope design of the legendary Klipschorn and La Scala speakers.

Bi-amp Input Panel and Binding Posts

The Forte’s premium, aluminum input panel accommodates large, high-quality speaker cables. Strong, versatile, and quality binding posts provide the capability for bi-wiring or bi-amping. 

Book-matched Wood Veneer

Klipsch only uses book-matched wood veneers for the Heritage series. The veneer leaves are kept in order as they are delicately sliced from the timber and precisely arranged to provide a mirror image at the splice joint — like turning the pages of a book. This gives each speaker an aesthetically appealing and consistent appearance that is treasured more than any other cut of wood veneer.

Matched Pairs

Every pair of Heritage series loudspeakers are grain-matched using wood veneer panels that come from the same timber. Each cabinet is carefully matched so that each speaker in the pair is practically indistinguishable from the other. The speakers move seamlessly together through the factory, and each finished product is inspected and labeled with sequential serial numbers, ensuring that your Heritage series speakers leave the factory as a meticulously crafted set.

Built to Last

While each and every component of the Forte IV is built to last, Klipsch has always recognized the unique and critical role of a loudspeaker’s cabinet in the sound reproduction process. From the craftsmen in Hope, AR to the engineers in Indianapolis, IN, Klipsch has always put an extraordinary emphasis on cabinet design. The Forte enclosure is assembled using only the highest-grade adhesives and fasteners. This is a speaker you will hand down from generation to generation.



  • Frequency Response (+/- 3dB): 38Hz - 20kHz
  • Sensitivity: 99dB @ 2.83V / 1m
  • Power Handling (Cont/Peak): 100W / 400W
  • Maximum SPL: 116dB Continous
  • Nominal Impedance: 8 ohms Compatible
  • Crossover Frequency:
    • HF: 5.2kHz
    • MF: 650Hz
  • High-Frequency Driver: K-100-TI 1" (2.54cm) Titanium diaphragm compression driver on a K-79T horn
  • Midrange: K 702 1.75" (4.45cm) Polyimide Compression Driver mated to a K-703-M horn
  • Low Frequency Driver: K-281 12" (30.48cm) Fiber-composite cone woofer, KD-15 15" (38.1cm) Passive cone radiator
  • Enclosure Material: 3/4" MDF
  • Inputs: Dual binding posts / bi-wire / bi-amp
  • Dimensions (W x H x D): 16.63" x 35.75" x 13" per speaker
  • Weight: 72 lbs per speaker 

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What`s the best amp to drive these speakers Klipsch Forte IV Heritage Series 3-Way 12' Horn-Loaded?
Tawuyawo V on Aug 20, 2023
  Thank you for your inquiry. The Forte IV has a relatively high sensitivity rating thanks to its overall design and horn loaded mid and tweeter. It doesnt require a particularly high powered amplifier to sound great. (Power Handling, Continuous/Peak: 100W / 400W) A really great sounding stereo receiver like a Cambridge Audio AXR85 (85 watts per channel at 8 ohms) will result in outstanding performance from the Forte IV. But they can sound great with a more modestly powered tube amplifier or a more powerful (> 150 watts) McIntosh amplifier.
Is the grill on the KLIPSCH FORTE III 15' LOUDSPEAKER PAIR magnetic? Thank you
New User U on Feb 18, 2021
  Thanks for your inquiry. The grill frame has 8 posts that fit in to receptacles on the baffle.