What is the KLH Model Four?

The KLH Model Four is a 3-way acoustic-suspension slim floorstanding loudspeaker. It uses a sealed cabinet design to deliver tight, accurate bass along with detailed midrange and treble.

What does the slim floorstanding design offer?

Its narrow profile lets the Model Four fit comfortably into real living spaces while still providing full-range floorstanding sound. The included riser base tilts the speaker back for driver alignment and added stability.

What drivers does the Model Four use?

It features an 8 inch pulp-paper woofer, a 4 inch pulp-paper midrange, and a 1 inch aluminum dome tweeter. The woofer and midrange use a reverse-roll rubber suspension for precise cone control and lower distortion.

Why does KLH use pulp-paper cones?

The woofer and midrange cones are made of treated paper pulp, a light and well-damped material. KLH voices these cones for a natural, uncolored tone.

What kind of tweeter is fitted?

The Model Four uses a 1 inch anodized aluminum dome tweeter. The metal dome is light and rigid, which helps deliver extended, detailed treble.

What is acoustic suspension and why does it matter?

Acoustic suspension means the cabinet is completely sealed, so the trapped air acts like a spring that controls the woofer's motion. This produces very tight, accurate, low-distortion bass that stays clean at high volume, from a smaller box than a ported design would need.

Does the sealed design have any trade-offs?

The main trade-off is slightly lower sensitivity, so the speaker rewards a capable amplifier. In return you get cleaner, more controlled bass that holds up at higher listening levels.

What room size suits the Model Four?

The Model Four is well suited to small and medium rooms where a slim floorstander can deliver full-range sound without dominating the space. In very large rooms you may prefer a larger model in the range.

How should I place the Model Four?

Position the speakers a little away from the rear wall and toe them in toward the listening seat for the best imaging. The slant-riser base tilts the drivers toward ear height, so keep it installed for proper alignment.

What amplifier do I need?

With 88 dB sensitivity and a 6 ohm nominal impedance, the Model Four pairs well with most quality stereo or home theater amplifiers. A robust amplifier is rewarded, as acoustic-suspension designs benefit from ample clean power.

What is the impedance and sensitivity?

The Model Four has a nominal impedance of 6 ohms with a 3.5 ohm minimum, and a sensitivity of 88 dB measured at 2.83 volts at 1 meter. It can reach a maximum SPL of 108 dB.

How much power can it handle?

The Model Four handles 150 watts continuous and 600 watts peak. This gives plenty of headroom for dynamic music and movies.

What is the frequency response?

The Model Four covers 46 Hz to 20 kHz within plus or minus 3 dB. This provides solid bass extension along with clear, extended highs from a slim cabinet.

What is the Acoustic Balance Control?

It is a 3-position high-frequency level switch on the speaker that raises or lowers the treble in small steps. This lets you tune the brightness to your room and taste, and it is a KLH signature carried over from the original Model Five.

What are the crossover frequencies?

The internal crossover splits the signal at 380 Hz and 2,500 Hz. This sends each part of the music to the woofer, midrange, and tweeter for smooth, coherent sound.

What connections and grille does it use?

The Model Four has 5-way gold-plated binding posts that accept a variety of speaker cable terminations. It also includes a magnetic knit grille that attaches cleanly with no visible hardware.

What finishes are available?

The Model Four comes in English Walnut with a Stonewash grille, Black Ash with a Grey grille, and White Oak with a Black grille. Each pairs a real cabinet finish with a coordinated grille.

How does the Model Four compare to the Model Three?

The Model Three is a stand-mount bookshelf speaker, while the Model Four is a 3-way slim floorstander with its own dedicated midrange. The Model Four offers deeper bass extension and a fuller full-range presentation without needing separate stands.

How does the Model Four compare to the Model Five?

The Model Five is a larger 3-way acoustic-suspension floorstander built for bigger rooms and greater output. The Model Four brings much of the same acoustic-suspension character in a slimmer, more room-friendly cabinet.

How does the Model Four compare to the Model Seven?

The Model Seven is a larger flagship-style floorstander with a 4 ohm impedance and a sealed sub-enclosure that isolates its woofer for cleaner sound, asking more current of the amplifier. The Model Four is a more compact 6 ohm design that is easier to drive and to place while keeping the signature sealed-box sound.

KLH Model Four

Description

The KLH Model Four is the largest floorstander in the reborn Model series, a three way acoustic suspension design that carries forward the sealed cabinet tradition KLH helped pioneer. An 8 inch pulp paper woofer, a dedicated 4 inch midrange, and a 1 inch aluminum dome tweeter work together in a slim, furniture grade cabinet tuned for natural tonal balance and tight, well defined bass.

Because the cabinet is sealed rather than ported, the Model Four produces bass that starts and stops cleanly and reaches down to 46 Hz without the overhang that some vented designs add. A three position acoustic balance control lets you set the high frequency level to suit your room and taste, while five way gold plated binding posts and a 6 ohm nominal load make it a comfortable match for a wide range of amplifiers.

Finished in real wood veneers with a magnetic knit grille and a matching riser base, the Model Four is built to look as considered as it sounds. It is a floorstander for the listener who wants full range, room filling sound with the honest, unhyped voicing that has defined KLH from the beginning.

Buyer’s Guide

Specs

Design	3-way acoustic suspension (sealed) slim floorstander
Woofer	8 inch pulp-paper cone, reverse-roll rubber suspension
Midrange	4 inch pulp-paper cone, reverse-roll rubber suspension
Tweeter	1 inch aluminum dome
Frequency Response	46 Hz to 20 kHz (+/-3 dB)
Sensitivity	88 dB (2.83 V at 1 m); maximum SPL 108 dB
Nominal Impedance	6 ohms (3.5 ohm minimum)
Power Handling	150 watts continuous, 600 watts peak
Crossover Frequencies	380 Hz and 2,500 Hz
Acoustic Balance Control	3-position high frequency level switch
Binding Posts	5-way gold-plated
Grille	Magnetic knit grille
Cabinet Finishes	English Walnut with Stonewash grille, Black Ash with Grey grille, White Oak with Black grille
Warranty	10 years
Dimensions (W x H x D)	32.2 x 13 x 10.9 inches with riser base (26 in tall without riser)

Warranty

Sold as an authorized KLH dealer by All Elite Audio. New KLH Model Four units include the full KLH manufacturer warranty of 10 years parts and labor for the original owner. Contact us with any setup or service questions.

What's in the Box