The K-Series marks the beginning of a new era for Epos. Designed by Luke Creek, the 2 ½ way K3 floor-standing loudspeaker is the largest model within this range of loudspeakers.
The initial concept started out with a thought about how to take conventional cabinet loudspeakers into a new area of the market. This spawned the idea of how to make a loudspeaker the hub, or central place, for your Hi-Fi system. This concept had to be achieved whilst preserving Epos high-end roots.
The K-Series has a number of unique design features that enables it to achieve its design goal. These features include: stylish looks, High Velocity Slot Ports (HVSP), rear mounted drivers, detachable rear baffles and upgradability to fully powered active mode. The K-Series is much more than just another box loudspeaker, it is probably the future!
Within the K-Series are a number of new technologies developed to allow superior performance over previous models.
Epos has found that, if properly implemented, High Velocity Slot Ports (HVSP) can produce dramatic improvements over conventional cylinder ports. HVSP achieves lower audible distortion, by virtue of its lower intrinsic drag and reduced turbulent airflow within the port. HVSP can also lower air loading to the mid and bass drivers, which helps to keep them operating in a more linear region throughout their excursion range.
In a departure from earlier designs, the port is now located on the front baffle of the cabinet. Using a front firing port, the K-Series offers more flexibility with room placement. They can indeed by positioned closer to a wall, without restricting their operation.
The clever clamping mechanism used to secure the drivers has resulted in an even distribution of tension applied to the surface of the basket. This uniformed clamping pressure helps to reduce unwanted vibrations that would normally result in higher levels of distortion. The end result is a beautifully clear and transparent mid-range quality.
Cabinet coloration is a critical area of a loudspeakers design, that is sometimes overlooked; but not with the K-Series. Not only are the K series cabinets carefully braced internally, they have also been developed with removable rear baffles. This is an idea dating back to the ES11 days of Epos, with its sandwich construction method. The theory is to reduce the energy absorbed by the cabinet. One way to achieve this is by making the rear baffle a separate element in the construction. The aim is a reduction in cabinet colouration, or unwanted resonance. There is another reason for using removable rear baffles, which is to facilitate Active-K.
Active-K is a novel feature, to allow the consumer to simply upgrade their loudspeaker from passive to active operation. Further performance increases have been achieved with the implementation of high quality crossover components, including the selection of very high-grade polypropylene capacitors and metal oxide resistors. As standard, the K-Series comes pre-wired with Oxygen Free multi-stranded copper wire. Specially designed cable management holes inside the cabinet and high current connectors allow for aftermarket replacement cable sets to be installed, if required.
The all new K-Series cabinet design is constructed from 15mm MDF and includes some very clever internal bracing to minimize cabinet coloration. The K-Series sees the introduction of a new front firing slot port technology. This slot port was designed for two especial reasons.
Firstly, it allows a high volume of air to pass without introducing any nasty audible effects such as chuffing, unlike some conventional tube ports. Secondly, the slot port has enabled Epos to achieve incredibly low frequency response performance from a relatively small driver area.
One of the key design factors included in the K-Series is the ability to upgrade into an active digital speaker. The rear panel and passive crossover are designed to be removed and replaced with their own Active-K module.
The K-Series is available in two elegant silk White or Black finishes with an optional grille being available. Both finish options give you a wonderfully luxurious look and feel to these loudspeakers.
The Active-K module sets the K-Series range of loudspeakers apart from the rest of the field. The Active-K replaces the passive crossover with an active crossover, allowing for superior driver integration, better bass response and an even wider dynamic range.
The Active-K module will come in two stages, the first being a more conventional Active style configuration with a simple Balanced and Unbalanced live level input. This version will also include adjustment switches to allow small changes to the performance of the speaker i.e. +/- 1.5dB steps in attenuation for both the Tweeter and Mid-Bass. This version is set for release in the Spring of 2015.
The second stage will see one of the speakers becoming the master of your system. This version sees one of the Active-K panels house digital inputs, digital volume control and a Bluetooth receiver. An intuitive remote control will allow the users to adjust het volume and switch inputs with ease. This version will be coming later in 2015.
Using virtual performance CAD simulation tools, Epos has achieved very high performance, and a clean, open yet smooth sound quality from this tweeter.
The tweeter has a low resonance frequency, high sensitivity and extended high frequency response. With a 25mm fabric-dome, short horn, high-temperature ferro-fluid cooled voice-coil, and neodymium magnet, it is capable of high output levels for extended periods without degradation to sound quality.
The Epos K3 mid-bass drivers produces an even frequency response and smooth roll-off.
The Epos 187mm mid-bass driver has a high-quality polypropylene cone and a bullet-shaped dust cap. These components form a stiff, yet pliable, well-damped structure which retains its shape even under high power loading.
The K3 mid-bass drivers also benefits from a bucking-magnet system, ensuring all the magnetic force is concentrated around the voice-coil, allowing for low distortion and high efficiency.
In true Epos tradition; the K-series has reverted to a more simplistic passive crossover topology, for which the brand is synonymous.
A first order crossover is used to allow the Epos tweeter to have a wide dynamic range with super low distortion. The mid-bass crossover uses a 2nd order filter ensuring the K3 is an easy load for any amplifier.
Power Handling: 200 Watts unclipped speech and music
Frequency Range: 41 Hz 30 kHz
Impedance: 4 Ohm nominal
Sensitivity: 91dB / 2.83V@1m
Tweeter: Epos 25mm soft dome with high-temperature voice coil, ferrofluid cooling and neodymium magnet system
Bass/Midrange Driver: x2 187mm Epos mid bass drivers, with 25mm high-temperature voice coil and polypropylene cone.
Internal Wiring: 18 AWG stranded oxygen free copper cable.
Finish: Painted Black
Grille: The K3 has an optional Snap on-grille.
Size (w x d x h): 8.3" x 11.8" x 36.8"
Weight: 40.7 lbs per single speaker, 44 lbs per carton (packaged one speaker per carton)
Includes: 5 year manufacturer warranty.