Klipsch Forte (1985)

Name: Klipsch Forte
Brand: Klipsch

At 98dB sensitivity, it needs little power, but it gets very loud when fed serious power.

Overview

The Klipsch Forte came out in 1985, and it stunned listeners with its dynamic punch and clarity. It arrived with the CD format and the growing appetite for home theater. True to Paul Klipsch's obsession with efficiency and low distortion, the original Forte used horn-loaded tweeter and midrange drivers, delivering 98dB sensitivity with just one watt. Even modest amplifiers could drive it to lifelike levels. High-wattage gear, like the Hafler and Adcom monoblocks commonly paired in dealerships, made it come alive. Owners report that in a showroom the speaker's slam and dynamics often left customers laughing in disbelief. A Stereo Review test in 1986 said the Forte's low-frequency distortion was "by far the lowest we have ever measured," and its sensitivity so exceptional that "comparison with most other speakers is impossible."

The original Forte had quirks. The midrange was wired out of phase with the woofer and tweeter, and some listeners found it altered the tonal balance in subtle but noticeable ways. The crossover sits behind the rear jack panel and uses a mix of iron-core and air-core inductors, along with blue KSC mylar capacitors. They were solid parts for the time, though later owners often upgraded them for tighter control and clarity. The cabinet has a relatively slim footprint, and Klipsch pushed that as a major selling point: huge sound without the bulk. Over time the Forte developed a cult following among people who liked its raw, unapologetic delivery.

Specifications

Manufacturer	Klipsch
Product type	Floorstanding loudspeaker
Sensitivity	98dB @ 1 watt
Frequency response	32Hz-20kHz ± 3dB
Power handling	100 watts continuous
Impedance	The impedance rose to a peak of 20 ohms at 65 Hz, then dropped back to 8 ohms at 200 Hz

Key Features

Horn-Loaded Tweeter and Midrange

True to Klipsch's core design philosophy, the Forte used horn-loaded drivers for both the tweeter and midrange. Horn loading increases driver efficiency while reducing distortion, so the speaker reproduces transients with speed and precision. The midrange cuts through dense mixes without strain, and the tweeter delivers highs without harshness. These drivers were central to the Forte's reputation for clarity, especially with early CDs, which exposed the limits of many contemporary speakers. The horn geometry helped project sound evenly across a wide listening area. Stereo Review called the room response "one of the widest and smoothest" they'd ever measured.

Out-of-Phase Midrange Wiring

One of the more debated aspects of the original Forte is that the midrange driver was wired out of phase relative to the woofer and tweeter. This changed the acoustic summation between drivers, potentially affecting tonal balance and imaging precision. It was not universally criticized, but technicians and audiophiles argued over it. Whether it was a design oversight or an intentional compromise to manage lobing patterns is undocumented. Owners need to account for it when setting up or restoring these speakers.

Internal Crossover with Iron-Core Inductor

The Forte's crossover is mounted inside the rear of the jack panel, a space-saving layout that also protected the components from tampering. It uses an iron-core inductor on the woofer, which is good for power handling but potentially prone to saturation at high levels, and an air-core inductor on the tweeter, which preserved high-frequency detail. Capacitors include blue KSC mylar film types, known for their reliability, plus a single KSC electrolytic capacitor on the woofer circuit. These parts became a common target for upgrades. Enthusiasts in the 2000s routinely replaced the film capacitors with higher-tolerance models, swapped in audio-grade resistors, and upgraded the electrolytic cap for improved bass control. The tweeter's inductor was also sometimes replaced with a larger-gauge air-core coil to reduce inductance losses.

Transformer-Based Midrange Attenuation

Instead of a simple resistor to attenuate the midrange output, the Heritage series Forte models, including later reissues, used a transformer. This preserved impedance matching and minimized signal loss, which is a more sophisticated solution than resistive padding. Transformers can introduce their own coloration if poorly designed, but here the transformer was used to match volume in place of a resistor.

Historical Context

The Klipsch Forte was introduced in 1985. The compact disc had arrived, and home theater systems were beginning to emerge with Dolby Surround decoding. Klipsch saw an opportunity to blend high efficiency with modern performance demands, and the result was the Forte. It competed against popular models from Polk Audio, Boston Acoustics, Mission, Infinity, Advent, and JBL, brands that often prioritized aesthetic integration over raw output. The Forte stood apart with its horn-driven design and commanding presence. In 1989, Klipsch retired the original model and replaced it with the Forte II, which had a redesigned Tractrix horn midrange, a larger 15-inch passive radiator, and magnets for grill attachment. The Forte line was revived in 2017 as the Forte III, part of Klipsch's Heritage series, and updated again in 2021 as the Forte IV with modern materials and cosmetics.

Collectibility & Value

Original Forte models came in a wide range of wood veneers, including macassar ebony, zebrawood, rosewood, and teak. Around 1990, Klipsch discontinued these finishes due to environmental concerns about rainforest sourcing, which makes early examples with rare veneers particularly desirable. No original MSRP is documented in the fact sheet, but a 1985 price of $1,100 per pair has been reported, which was substantial at the time. Used Forte I and II models occasionally appear on the market, with Forte IIs reportedly selling near $1,000 per pair in recent trades. Horn diaphragms can degrade over decades, so maintenance matters. Well-maintained originals remain sought after, especially by those who value vintage high-sensitivity designs.