KLH Model Four Hi-Fi Floorstanding speaker Black Ash

KLH Model Four Floorstanding Loudspeaker — Acoustic Suspension for Real Rooms

The KLH Model Four is a compact three-way floorstanding loudspeaker built around the sealed acoustic-suspension principle. Unlike ported designs, this sealed cabinet can sit as close as 15 cm to a back wall without losing bass tightness. At just 33 cm wide and 27.9 cm deep with the included riser, the speaker delivers floorstander presence without forcing a room to be built around it. Black Ash real-wood veneer, magnetic grilles, and a 6° angled steel riser base complete a timeless mid-century-inspired silhouette.

What Sets the Model Four Apart

Most floorstanders at this size skip a dedicated midrange driver, asking the woofer and tweeter to share the most critical part of the audio spectrum. The Model Four does not make that compromise: a dedicated 4-inch pulp-paper midrange handles voices, guitars, and piano fundamentals. A three-position Acoustic Balance Control on the rear panel trims the mid/high output by 1.5 or 3 dB to suit reflective or heavily damped rooms.

Three-Way Driver Configuration — Full-Range Clarity

Three purpose-built drivers cover the full audible band. The 8-inch woofer reaches down to 46 Hz from a sealed enclosure, the 4-inch midrange covers the band where the human ear is most sensitive, and the 1-inch aluminum dome tweeter delivers extended treble without harshness.

• Low Frequency Driver: 8" (203 mm) pulp-paper cone with reverse-roll rubber surround and 1.5" flat-wire voice coil — deep, controlled bass from a sealed enclosure
• Mid Frequency Driver: 4" (102 mm) pulp-paper cone with reverse-roll rubber surround — dedicated driver for voices, guitars, and piano fundamentals
• High Frequency Driver: 1" (25 mm) aluminum dome with soft rubber surround — smooth, extended treble

Performance Specifications — Power Handling and Sensitivity

With 88 dB in-room sensitivity and 6-ohm nominal impedance, this floorstander pairs comfortably with amplifiers from 30 to 150 watts. The sealed cabinet produces tight, articulate bass rather than the boom of a ported design, and the 108 dB maximum in-room SPL gives it headroom for medium-to-large listening spaces.

• Frequency Response: 46 Hz – 20 kHz (±3 dB) — full-range coverage with low extension to 35 Hz at -10 dB
• Sensitivity: 88 dB in-room / 85 dB free-field at 2.83 V / 1 m — easy to drive with modest integrated amplifiers
• Power Handling: 150 W RMS / 600 W peak — recommended amplification 30–150 W

Cabinet Construction and Connectivity

Structurally reinforced MDF panels (19 mm and 25 mm) form the enclosure, finished in real wood veneer and topped with a magnetically attached grille. The wide front baffle is a signature KLH design choice that focuses acoustic energy forward, reducing side-wall reflections. Gold-plated five-way binding posts accept bare wire, pins, spades, or single banana plugs.

• Enclosure: Sealed acoustic-suspension MDF with 19 mm and 25 mm panels — flexible placement near walls and corners
• Inputs: Five-way gold-plated binding posts — accepts bare wire, pins, spades, or banana plugs
• Crossover: MF 380 Hz / HF 2,500 Hz (2nd-order electro-acoustic)

Who Should Consider the Model Four

The Model Four is the right choice for listeners who want genuine three-way clarity and the placement flexibility of a sealed cabinet, without the footprint of a full-size tower. It suits music lovers building a dedicated two-channel system in a medium-to-large room, especially those whose listening space places the speakers close to a back wall or in a corner where ported designs would boom. Vinyl enthusiasts, classical and jazz listeners, and anyone prioritizing vocal and acoustic-instrument realism will benefit most from the dedicated 4-inch midrange. The 88 dB sensitivity means even modest integrated amplifiers in the 30–150 W range can drive it convincingly.