Klipsch KG-4 (1985–1992)

Name: Klipsch KG-4
Brand: Klipsch

Big, bold, and brimming with life—these floor-standers don’t whisper, they declare.

Overview

The Klipsch KG-4 isn’t subtle. From the moment you lay eyes on its substantial MDF cabinet and commanding horn, it’s clear this speaker was built to dominate a room—sonically and visually. Introduced in 1985 as part of the Klipsch KG series, the KG-4 was engineered for listeners who wanted a full-range speaker capable of high listening levels and good solid bass without needing a monster amplifier to drive it. With a sensitivity of 94dB, it only takes about 20 watts to make them sing, making it a natural partner for modest tube or solid-state gear. Despite its efficiency, it can handle up to 100 watts continuous (400 watts peak), so it won’t flinch when the music gets loud. This is a speaker that delivers a wall of sound—big, springy, and tangible—without falling into fatigue or harshness, even over long listening sessions.

Specifications

Manufacturer	Klipsch
Model	KG-4
Type	floor standing loudspeaker, two-way loudspeaker
Production years	1985 to 1992
Price new	$672 a pair
Frequency response	38Hz-20kHz ±3dB
Sensitivity	94dB @ 1watt/1meter
Power handling	100 watts maximum continuous (400 watts peak)
Nominal impedance	8 ohms
Tweeter	K-74-K 1" (2.54cm) Phenolic dome compression driver
High frequency horn	90°x40° Exponential Horn
Woofer	Two K-8-K 8" (20.32cm) Poly ICG cone active / KD-12 12" (30.48cm) Fiber-composite cone passive
Enclosure material	Medium density fiberboard construction (MDF)
Enclosure type	Bass reflex via passive radiator
Dimensions	24.5" H x 15.5" W x 12.5" D
Weight	48 lbs
Finishes	Walnut Oil, Oak Oil, Finished Black
Crossover Frequency	1800Hz
Terminal type	proper three-way banana terminals

Key Features

Horn-Loaded High Frequencies

The KG-4 uses a K-74-K 1" phenolic dome compression driver mated to a 90°x40° exponential horn, delivering clear, extended highs without the sizzle or glare that plagues some vintage designs. Reviewers note the highs are “silky” and accurate, especially on cymbals, flutes, and strings. The horn design contributes to the speaker’s high efficiency and dynamic punch, ensuring transients snap with precision. Despite its horn heritage, the treble remains smooth and non-fatiguing—especially when paired with warm tube electronics.

Passive Radiator Bass Extension

Instead of a traditional port, the KG-4 employs a rear-mounted passive radiator (sometimes called a drone cone) to reinforce bass output. This design acts like an active bass reflex port: when the active 8" woofers move backward, the rear acoustic wave pushes the passive 12" fiber-composite cone outward, enhancing low-frequency output. The result is deep, fast, and full-bodied bass that extends down to 38Hz. This setup avoids port turbulence and allows for tighter tuning in smaller enclosures—though room placement is critical to avoid boomy or uneven response.

Robust Connectivity and Build

The KG-4 features proper three-way banana terminals that accept AWG12 cable and banana plugs, making it easy to bi-wire or bi-amp if desired. The grills attach magnetically, a convenience that was still relatively novel in the mid-80s. The MDF cabinet is solid and well-damped, finished in Walnut Oil, Oak Oil, or Finished Black, and comes with screw-on bases and small detachable risers. While the risers elevate the speaker slightly, some owners report better sound when using dedicated stands instead.

Historical Context

Launched in 1985, the KG-4 arrived during a period when Klipsch was refining its horn-loaded designs for the modern audiophile market. It was part of the KG series, a line that aimed to deliver high-efficiency performance in more conventional floor-standing formats—unlike the corner-hugging Klipschorn. One reviewer described the Klipsch Corner Horn as the “progenitor” of the KG-4, suggesting a lineage of high-efficiency, full-range horn design, though the KG-4 stands as its own distinct evolution with modern materials and a passive radiator for improved bass tuning.

Collectibility & Value

Though no longer in production, the KG-4 has developed a loyal following. Owners consistently describe them as “very good sounding,” “dynamic and lively,” and “near perfect” for rock, jazz, and electronica. They’re less favored by classical purists, who may find the forward horn character too intense for delicate orchestral passages. In the used market, pairs rarely appear under $400 CAD, with recent listings reaching $600 CAD—though exact U.S. dollar equivalents and current listings are sparse. One Reddit user noted they’ve “never seen a pair of KG4s or similar for under $400cad recently.”

Common issues include deteriorating surrounds on the rear passive radiators, which tend to degrade after 20–30 years. Professional re-foaming is a typical restoration step. The crossover capacitors (“old caps”) may also need replacement over time, and third-party repair kits are available from specialists like Bob Crites, who also offers a $50 titanium diaphragm upgrade for the tweeter and original Klipsch Heritage #17 speaker fabric. Cosmetic wear—light scratches, chipped veneer on cabinet bases—is common but generally不影响 functionality. Fully operational pairs in good condition are considered excellent values for their performance.