KLH Model Four Hi-Fi Floorstanding speaker White Oak

KLH Model Four White Oak — Three-Way Acoustic Suspension Floorstanding Loudspeaker

The KLH Model Four is a passive three-way floorstanding loudspeaker built around a sealed acoustic-suspension cabinet. The Model Four White Oak pairs an 8" pulp-paper woofer, a dedicated 4" pulp-paper midrange, and a 1" aluminum dome tweeter in a sealed MDF cabinet finished in real White Oak veneer. With a frequency response of 46 Hz to 20 kHz (±3 dB), an in-room sensitivity of 88 dB, and a maximum SPL of 108 dB, it delivers full-range music reproduction from a compact, room-friendly footprint.

Acoustic Suspension and Wide-Baffle Design

Unlike ported designs, the Model Four uses a sealed enclosure where the trapped air controls woofer movement. The wide, shallow baffle focuses acoustic energy forward toward the listener, producing a wider soundstage and a more forgiving sweet spot than narrow-baffle competitors. A three-position Acoustic Balance Control on the rear panel trims midrange and high-frequency output by 1.5 or 3 dB, adapting the speaker to bright or heavily damped rooms.

Three-Way Driver Array for Full-Range Clarity

Most speakers of this size skip the midrange driver, forcing the woofer and tweeter to cover the entire vocal band. The Model Four does not make that compromise. A dedicated 4" pulp-paper midrange handles voices, guitars, and piano, while the 8" pulp-paper woofer delivers controlled bass down to 46 Hz. A 1" aluminum dome tweeter with a soft rubber surround produces extended treble. The second-order electro-acoustic crossover is set at 380 Hz and 2,500 Hz.

• Low-Frequency Driver: 8" pulp-paper cone with reverse-roll rubber surround and 1.5" flat-wire voice coil — extends to 46 Hz
• Midrange Driver: 4" pulp-paper cone with reverse-roll rubber surround
• High-Frequency Driver: 1" aluminum dome with soft rubber surround
• Crossover Frequencies: 380 Hz / 2,500 Hz (2nd-order electro-acoustic) — keeps each driver focused on a narrow slice of the spectrum

Amplifier-Friendly Power Handling and High SPL

With an in-room sensitivity of 88 dB (2.83 V / 1 m) and a nominal impedance of 6 ohms (3.5 ohm minimum at 120 Hz), the Model Four pairs comfortably with amplifiers rated from 30 to 150 watts. RMS power handling is 150 W, peak handling reaches 600 W, and the speaker achieves a maximum in-room SPL of 108 dB. Low-frequency extension reaches 35 Hz at -10 dB, and horizontal dispersion is rated at 140 degrees at -6 dB.

• Frequency Response: 46 Hz – 20 kHz (±3 dB)
• Sensitivity: 88 dB in-room / 85 dB free-field (2.83 V / 1 m) — easy to drive
• Power Handling: 150 W RMS / 600 W peak
• Maximum SPL: 108 dB in-room — reaches 101 dB at 45 Hz

Compact Floorstanding Cabinet with Real Wood Veneer

The structurally reinforced MDF enclosure measures 33 cm wide and 21 cm deep without the riser base, allowing placement as close as 15 cm from a wall. An included 6° powder-coated steel riser base lifts the speaker to a listening height of 81.8 cm and angles the drivers toward the seated listener. Five-way gold-plated binding posts accept bare wire, banana plugs, spades, or pin connectors. The White Oak finish is a real wood veneer, paired with a magnetically attached grille.

• Dimensions (with riser): 81.8 × 33 × 27.9 cm (H × W × D)
• Dimensions (without riser): 66 × 33 × 21 cm (H × W × D)
• Weight: 21.3 kg with riser / 17.9 kg without
• Inputs: Five-way gold-plated binding posts — accept bare wire, banana plugs, spades, or pin connectors

For Listeners Who Want Three-Way Clarity in Real Rooms

The KLH Model Four White Oak is the right choice for music lovers who want the vocal clarity of a dedicated midrange driver and the placement flexibility of a sealed acoustic-suspension cabinet. It suits living rooms, dens, and smaller listening spaces where ported floorstanders would normally demand generous rear clearance. The 88 dB sensitivity and 30–150 W recommended amplification range make it a comfortable match for integrated amplifiers as well as more capable separates.