Epos Acoustics K3 Floor Standing Speakers (Black, 1 Pair)
The K-3 is a stylish and sonically impressive
loudspeaker, built to a very high standard!
The K-Series marks the beginning of a new era for Epos. Designed by Luke Creek,
the 2 ˝ way K3 floor-standing loudspeaker is the largest model within this range
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 see’s 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
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
Includes: 5 year manufacturer warranty.