Klipsch Heritage is the brand's oldest and most philosophically consistent line, tracing back to Paul W. Klipsch and the Klipschorn of 1946. The through line across the family is horn loading, high efficiency, and a preference for lively, dynamic reproduction over the polite, damped presentation favored by many competing schools of speaker design. The Fives II sits at an interesting intersection in that catalog: it takes the horn-loaded voicing that defines the passive Heritage models and folds it into a self-contained, fully powered desktop and shelf system. In other words, it is Heritage acoustics with the amplification, digital conversion, and connectivity built in, so no separate amp or receiver is required.
What exactly is The Fives II?
The Fives II is a two way powered bookshelf speaker system, meaning it is a stereo pair with all amplification and signal processing built into the cabinets. One speaker is the primary unit and houses the electronics, inputs, and controls; the other is the secondary, passive-fed partner. You do not add an external amplifier or streamer. You connect sources directly and the system drives itself. This is what separates it from the classic passive Heritage speakers, which require external electronics and careful amplifier matching.
Driver Topology and Acoustic Design
How does the tweeter and horn arrangement work?
The high frequencies are handled by a 1 inch Titanium diaphragm compression driver mated to a Tractrix horn. A compression driver works differently from a conventional dome tweeter. Instead of firing directly into the room, the diaphragm pushes air through a narrow throat, which raises acoustic impedance and dramatically increases efficiency. That compressed wavefront then expands through the horn. The result is more output for a given amount of power and lower diaphragm excursion, which reduces distortion at high volume.
The Titanium diaphragm matters here. Titanium is light and stiff, so it behaves as a rigid piston across most of its operating band before breaking up. That stiffness pushes its first breakup mode high, which supports the extended top end reflected in the frequency response reaching 25kHz. The tradeoff enthusiasts should understand is that metal diaphragms can exhibit a sharper resonant character near breakup, which is one reason horn geometry and crossover shaping are so important.
Why does Klipsch use a Tractrix horn?
The Tractrix horn is used because its specific flare geometry controls directivity and improves the efficiency of energy transfer from the compression driver into the room. A Tractrix profile is derived from a particular mathematical curve chosen to maintain a more constant expansion of the wavefront as it exits the throat. The practical benefits are twofold. First, controlled directivity means the speaker projects high frequencies into a defined coverage pattern rather than spraying them broadly, which reduces early reflections off nearby surfaces and tends to yield cleaner imaging on a desktop or shelf. Second, the smooth flare minimizes internal reflections and diffraction at the mouth, which reduces the ragged response and time smear that afflict poorly designed horns. This is a signature Heritage element, and it is a big part of why these speakers sound immediate and forward compared with typical soft dome designs.
What does the 4.5 inch woofer contribute?
The 4.5 inch high output driver reproduces the midrange and bass, handing off to the horn at the crossover point. In a compact two way, the mid woofer does the heavy lifting: it must produce vocal fundamentals, instrumental body, and low end all from a single cone. A 4.5 inch driver is chosen here as a deliberate balance. It is small enough to keep the cabinet shelf friendly and to maintain good midrange integration with the horn, yet it is engineered for high output to keep pace with the naturally efficient compression driver above it. Matching the sensitivity and dynamic capability of the woofer to the horn is essential in a horn-loaded design, because a mismatch would make the top end sound detached or hot relative to the midbass.
Why a rear firing bass reflex port?
The enclosure is a bass reflex design with a rear firing port, which extends low frequency output below what a sealed box of this size could achieve. A bass reflex, or ported, alignment uses a tuned port to reinforce output near the cabinet's tuning frequency. The air mass in the port resonates and adds acoustic output in the low bass, effectively extending the usable bottom end and improving efficiency in that region. That extension is part of how a cabinet this compact reaches a rated low end of 50Hz. The tradeoff of any port is group delay and reduced control below tuning, but for a small speaker the added extension and sensitivity are usually the right compromise.
Because the port fires rearward, placement matters. Positioning the speaker very close to a wall will reinforce and potentially boom the bass, while pulling it out gives a leaner, tighter low end. Enthusiasts should treat the rear port as a tuning tool and experiment with distance to the boundary behind the speaker.
Interpreting the Measurements
What does the 50Hz to 25kHz +/- 3dB spec actually tell us?
The frequency response of 50Hz to 25kHz +/- 3dB tells you the usable bandwidth and, importantly, the tolerance window within it. The +/- 3dB figure is the meaningful part. It means the output stays within a 6dB total window across that entire range, which is a legitimate, honest way to state response because it defines flatness rather than just quoting the extremes where output has fallen off a cliff. A specification that only listed the endpoints without a tolerance would be far less informative.
The 50Hz lower limit is respectable for a cabinet measuring 12.6 inches high, 6.5 inches wide, and 9.25 inches deep, and it reflects the bass reflex tuning discussed above. You still get most of the fundamental energy of bass guitar, kick drum, and male vocals, though the deepest sub-bass octave lies below this point, which is precisely why the subwoofer output exists. The 25kHz upper limit reflects the Titanium compression driver's ability to extend beyond the audible band, which helps ensure the top of the audible range is reproduced without early roll off.
Amplification, Power, and Signal Path
How does the built-in amplification and processing work?
Because The Fives II is a powered system, the amplification, digital to analog conversion, and crossover are handled internally within the primary speaker, and the signal is distributed to the secondary speaker. This is an active approach, which carries real engineering advantages over a passive speaker plus separate amp. The amplifier is matched at the factory to the exact drivers, so there is no guesswork about impedance compatibility or power matching. The crossover can be implemented and voiced with the specific horn and woofer behavior accounted for, and the digital inputs are converted internally rather than depending on the quality of an external source's analog output. For the listener, this means predictable, repeatable performance out of the box without assembling a chain of components.
What role does the phono stage and MM switch play?
The RCA phono/line input with an MM switch lets you connect a turntable fitted with a moving magnet cartridge directly, with no external phono preamp required. A phono cartridge produces a very small signal that also needs RIAA equalization to restore the correct tonal balance that was intentionally altered when the record was cut. When you set the switch to phono, the built-in preamplifier applies that gain and RIAA curve. When set to line, the same RCA jacks accept a standard line level source such as a CD player or another preamp. This dual function keeps the back panel efficient and means a vinyl enthusiast can build a complete system around this one product.
Connectivity and System Integration
What can you connect to The Fives II?
The Fives II accepts HDMI ARC, Bluetooth, USB, optical, 3.5mm analog, and RCA phono/line with the MM switch, which makes it one of the more flexible hubs in the Heritage family. HDMI ARC deserves special attention because it connects directly to a television's ARC-enabled HDMI port and allows the TV's remote to control volume, letting the speakers serve as a genuine two channel replacement for a soundbar with far better dynamics thanks to the horn tweeter. Optical serves older televisions and disc players. USB provides a direct digital connection from a computer, bypassing the computer's internal converter. Bluetooth handles convenient wireless streaming from phones and tablets. The 3.5mm analog and RCA inputs cover legacy and analog sources. In practice, this collection of inputs lets one pair of speakers serve a desktop, a turntable rig, and a television at once.
Why is there a subwoofer output?
The subwoofer output exists so you can extend low frequency reproduction below the system's 50Hz rating by adding a powered subwoofer. Since the 4.5 inch woofer and the compact cabinet are optimized for balance and clarity rather than deep sub-bass, offloading the lowest octave to a dedicated subwoofer is the technically correct way to gain full range performance. It also relieves the main woofer of large excursion demands at the bottom, which lowers distortion in the midbass and lets the mains play louder cleanly. For film and electronic music, this output is the path to full range impact.
Build, Materials, and Physical Design
What are the cabinet finishes and construction like?
The Fives II is offered in Walnut and Matte Black, finishes chosen to place it in either a traditional Heritage aesthetic or a more modern, understated look. The Walnut option leans into the classic wood veneer tradition that has defined Heritage speakers for decades, while Matte Black suits contemporary rooms and desktop setups. Beyond appearance, a well braced, appropriately damped cabinet is essential to any speaker because enclosure resonances add coloration to the sound. The compact footprint is engineered to house both the drivers and the internal electronics while controlling those resonances.
Why do the two speakers weigh different amounts?
The primary speaker weighs approximately 10.9 pounds and the secondary approximately 10.2 pounds because the primary houses the amplification, connectivity, and control electronics that the secondary does not. That roughly 0.7 pound difference is essentially the mass of the internal electronic assembly and its associated hardware. Practically, it confirms which cabinet is the active brain of the system, and it is worth knowing when you set up the pair, since the primary needs to sit within reach of your sources and power.
Who The Fives II Is For
The Fives II is best understood as the powered, all-in-one expression of Heritage design philosophy. It brings the Tractrix horn, the Titanium compression driver, and the high efficiency, dynamically alive presentation that define the line into a form factor that needs no separate electronics. For an experienced listener, the appeal is getting genuine horn-loaded character on a desktop, behind a television, or on a shelf, with a phono stage and HDMI ARC built in, and the flexibility to grow the system with a subwoofer when the deepest octave is wanted. It is Heritage engineering distilled into a self-contained package, and it stays true to the ideas Paul Klipsch established more than seven decades ago.