If you are new to home audio, walking into the world of speakers can feel like learning a new language. This guide is here to change that. We are going to walk through the KLH Model Four floorstanding speakers in plain, friendly English, explaining what every part does and why it matters. No prior knowledge needed, and no jargon left unexplained. By the end, you will know exactly what these speakers are, where they fit in a music or movie system, and whether they are a good match for you.
The Basics: What Is This Speaker?
What is the KLH Model Four, and where does it fit in a system?
The KLH Model Four is a floorstanding speaker, which means it is a tall, freestanding speaker that sits directly on the floor rather than on a stand or shelf. In a typical setup you would use two of them, one on the left and one on the right, connected to an amplifier or a receiver (the box that powers your speakers and lets you choose what to play). The amplifier does the electrical heavy lifting, and the speakers turn that signal into the sound you hear. The Model Four is a great choice for listening to music and for the front left and right channels of a home theater system.
What does "3-way" mean?
"3-way" means the speaker uses three different types of drivers, each handling a different part of the music. A driver is simply a cone or dome that moves back and forth to make sound. Splitting the work into three parts (low, middle, and high) lets each driver do one job really well, which generally produces cleaner, more detailed sound than asking a single driver to do everything.
The Drivers: How the Model Four Makes Sound
What does the 8 inch woofer do?
The 8 inch woofer produces the low frequencies, the bass and deep foundation of the music. It is the largest cone in the speaker, made of pulp-paper (treated paper), which is light and naturally well-damped, meaning it does not add unwanted ringing or coloration to the sound. It also uses a reverse-roll rubber suspension, which is the flexible ring around the edge of the cone. That ring is designed to control the cone's movement very precisely, keeping the bass tight and reducing distortion.
What does the 4 inch midrange do?
The 4 inch midrange handles the middle of the musical range, where most of the important sound lives. Vocals, guitars, pianos, and the body of most instruments all sit in this region, so getting the midrange right is essential for natural, believable sound. Like the woofer, it uses a pulp-paper cone and reverse-roll rubber suspension, voiced by KLH for a natural, uncolored tone.
What does the 1 inch aluminum dome tweeter do?
The tweeter reproduces the high frequencies, the crisp, airy details like cymbals, the sparkle of a voice, and the sense of "openness" in a recording. This one is a 1 inch anodized aluminum dome. Metal is used because it is both light and stiff, which allows the tweeter to reproduce extended, detailed treble without flexing and distorting.
What is a crossover, and what do the 380 Hz and 2,500 Hz numbers mean?
A crossover is the internal filter that decides which driver plays which part of the music. Think of it as a traffic director inside the speaker. In the Model Four, sounds below 380 Hz go to the woofer, sounds between 380 Hz and 2,500 Hz go to the midrange, and everything above 2,500 Hz goes to the tweeter. This hand-off happens automatically and instantly, so you just hear one seamless sound.
KLH's Signature Design and Why It Matters
What is acoustic suspension, and why does KLH use it?
Acoustic suspension means the speaker cabinet is completely sealed, and that sealed design is the heart of what makes a KLH sound like a KLH. Because the box is airtight, the trapped air inside acts like a spring that gently controls the woofer's motion. The result is very tight, accurate, low-distortion bass that stays clean even when you turn the volume up. It also lets a smaller cabinet reach deeper into the bass than a vented (ported) design would. The one trade-off is slightly lower sensitivity, which simply means these speakers reward being paired with a capable amplifier. KLH helped popularize this design back in the late 1950s, and it has defined the brand's sound ever since.
What does the Acoustic Balance Control do?
The Acoustic Balance Control is a small 3-position switch on the speaker that lets you raise or lower the treble level in gentle steps. This is handy because every room is different. A room with lots of hard surfaces (bare floors, big windows) can sound bright, while a room full of soft furnishings and carpet can sound softer. This switch lets you tune the highs to suit your room and your personal taste. It is a KLH signature feature carried over from the classic Model Five.
What is the slant-riser base for?
The slant-riser base is an angled platform included at the bottom of the speaker that tilts it back very slightly. This small tilt aligns the drivers so their sound reaches your ears at the right time when you are seated, which improves clarity and imaging (the sense of where instruments are placed in front of you). It also adds stability, giving the speaker a wider, steadier footing. With the riser, the speaker stands 32.2 inches tall; without it, 26 inches.
Understanding the Key Specifications
What does a frequency response of 46 Hz to 20 kHz mean in real life?
It means the speaker reproduces sound from a deep 46 Hz at the low end all the way up to 20 kHz at the top, which is about the limit of human hearing. In practical terms, that lower number of 46 Hz means you get satisfying, room-filling bass without needing a subwoofer for most music. The "+/-3 dB" part is a measure of how consistent the volume stays across that range, and a tighter number like this indicates even, balanced sound.
What does a sensitivity of 88 dB mean in practice?
Sensitivity tells you how loud the speaker plays for a given amount of power, and 88 dB is a healthy, everyday-friendly number. A higher sensitivity means the speaker gets louder with less power. Because acoustic-suspension speakers tend to run a touch lower here, the Model Four appreciates a solid amplifier to give it plenty of clean power. The maximum SPL of 108 dB means these can play quite loud when you want them to, comfortably filling a room.
What does 6 ohms nominal impedance mean?
Impedance describes the electrical load the speaker presents to your amplifier, and 6 ohms is a common, easy-to-drive value that works well with most modern amplifiers and receivers. The minimum of 3.5 ohms simply notes the lowest point that load dips to during certain sounds. As long as your amplifier is reasonably capable, the Model Four is an easy partner.
What does the power handling of 150 watts continuous mean?
Power handling tells you how much power the speaker can safely take from an amplifier, and 150 watts continuous (with 600 watt peaks for brief loud moments) means there is generous headroom for dynamic music and movies. You do not need to reach these numbers to enjoy the speakers, but it does show they can handle a strong amplifier without strain.
Build, Finishes, and Peace of Mind
What connections and finishes does the Model Four offer?
The Model Four uses 5-way gold-plated binding posts, which are high-quality connectors that accept nearly any type of speaker wire and resist corrosion for a lasting, solid connection. The grille is a magnetic knit grille that snaps on and off cleanly with no visible holes or pegs. You can choose from three cabinet finishes: English Walnut with a Stonewash grille, Black Ash with a Grey grille, or White Oak with a Black grille.
Why do KLH's heritage and build quality matter?
They matter because good engineering and lasting construction are the reasons these speakers sound the way they do and keep sounding that way for years. KLH was founded in 1957 by Henry Kloss and is one of the storied American loudspeaker names. Modern KLH revives those acoustic-suspension designs with contemporary drivers and cabinets, and the Model Four is backed by a 10 year warranty, which reflects real confidence in how it is built.
Who Are the KLH Model Four Speakers For?
The Model Four suits someone who wants full, honest, floorstanding sound for music and movies and appreciates the clean, tight bass that a sealed acoustic-suspension design delivers. They fit beautifully into a two-channel music system or as the front speakers of a home theater. If you want speakers that are easy to place, adjustable to your room, handsomely finished in real-wood veneer options, and built to last, the Model Four is a warm and welcoming place to begin your home audio journey. Within KLH's own range, it sits comfortably between the more compact models and the larger Model Seven, offering a wonderful balance of size, depth, and detail.