KLH Model Four Hi-Fi Floorstanding speaker English Walnut

KLH Model Four English Walnut — Three-Way Acoustic-Suspension Floorstanding Loudspeaker

The KLH Model Four English Walnut is a compact three-way floorstanding loudspeaker built around the sealed acoustic-suspension principle. Its sealed cabinet pairs an 8" pulp-paper woofer, a dedicated 4" pulp-paper midrange, and a 1" aluminum dome tweeter, with each driver operating across a focused slice of the audio spectrum. At 13" wide and 8.25" deep without the riser, this speaker delivers classic floorstander presence without demanding a floor plan built around it. English Walnut veneer, a wide front baffle, and a magnetic grille complete a timeless silhouette suited to both modern and traditional interiors.

Acoustic-Suspension Engineering and Wide-Baffle Imaging

What separates this model from most floorstanders in its class is the sealed acoustic-suspension enclosure, a hallmark of KLH designs. With no ports or vents, the air trapped inside acts as a linear air spring, producing tight low frequencies and allowing placement as close as 6" from a back wall. The wide front baffle focuses acoustic energy forward, widens the sweet spot, and reduces side-wall reflections. A three-position Acoustic Balance Control on the rear panel trims mid and high frequencies by 1.5 or 3 dB to suit hard or soft room surfaces.

Three-Way Driver Topology — Dedicated Midrange for Vocal Clarity

Most compact floorstanders rely on a two-way design that asks the woofer to cover both bass and midrange. The Model Four instead uses a true three-way topology with a dedicated 4" midrange driver, freeing the 8" woofer to specialize in low frequencies and the 1" tweeter to handle the upper treble. This separation is most audible where the human ear is most sensitive: in vocals, guitars, and piano.

• Low-Frequency Driver: 8" pulp-paper cone with reverse-roll rubber surround and 1.5" flat-wire voice coil — sealed-cabinet bass reaching down to 46 Hz (-10 dB at 35 Hz).
• Midrange Driver: 4" pulp-paper cone with reverse-roll rubber surround — dedicated driver for the critical vocal and instrumental band.
• High-Frequency Driver: 1" aluminum dome with soft rubber suspension — smooth, extended treble.

Power Handling, Sensitivity, and Maximum Output

With 88 dB in-room sensitivity and a friendly 6-ohm nominal impedance (3.5 ohms minimum at 120 Hz), this speaker pairs comfortably with amplifiers from 30 to 150 watts. The 150 W RMS / 600 W peak power handling gives it headroom for dynamic peaks, while the 108 dB maximum in-room SPL ensures it can fill medium-to-large rooms without strain.

• Frequency Response: 46 Hz – 20 kHz (±3 dB) — full-range coverage from sealed-cabinet bass to extended treble.
• Sensitivity: 88 dB in-room / 85 dB free-field (2.83 V / 1 m) — easy to drive with a wide range of amplifiers.
• Power Handling: 150 W RMS / 600 W peak — comfortable headroom for dynamic musical peaks.
• Maximum SPL: 108 dB in-room — sufficient output for medium-to-large listening spaces.

Cabinet Design, Riser Base, and Connection

The enclosure is built from structurally reinforced ¾" and 1" medium-density fiberboard, providing a rigid, non-resonant foundation for the drivers. The wide front baffle is covered by a magnetically attached grille. The included 6° powder-coated steel riser base lifts the cabinet to the ideal listening height and angles the tweeter toward the seated listener.

• Enclosure: Structurally reinforced ¾" and 1" MDF with real English Walnut wood veneer — rigid, non-resonant sealed cabinet.
• Riser Base: 6° powder-coated steel, included — sets proper listening height and upward tilt.
• Inputs: Five-way gold-plated binding posts — accept bare wire, pin connectors, spade lugs, and banana plugs.
• Dimensions: 818 × 330 × 279 mm with riser / 660 × 330 × 210 mm without — slim 8.25" depth suits tight spaces.

For Audiophiles, Music Lovers, and Real-Room Listeners

The Model Four is the right choice for listeners who want genuine three-way audiophile performance in a cabinet that fits comfortably into a real living space rather than a dedicated listening room. Its sealed acoustic-suspension design rewards owners who cannot place speakers far from walls, and its 88 dB sensitivity means it does not demand a high-powered amplifier to sing. Vinyl and digital listeners who value vocal clarity and tight bass articulation will appreciate what this speaker delivers, whether paired with a vintage receiver or a modern integrated amplifier.