KRK VXT 4, Руководство пользователя

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Design Elements
New Custom Made Tweeter and Woofer Designs – KRK is renowned for designing high
performance studio monitor drivers. Your VXT monitors are no exception. A woven Kevlar® low
frequency driver was custom-designed specifically for each model. Kevlar® is one of the
strongest, lightest, most rigid materials that can be used in modern speaker cone construction.
Kevlar’s unique physical properties minimize axial or conical break up modes. Both tweeters and
woofer provide faster attack times. The new tweeters provide enhanced high frequency
extension with improved distortion characteristics.
Resonant Free Extended Low Frequency Enclosure Design - The cabinetry of your VXT
monitor is constructed from ABS Structural Foam which provides stronger structural
integrity compared to cabinets made from standard ABS solid materials. Because of the
increased strength of this process, the cabinet walls can be thinner than would be from using
MDF, increasing the interior volume of the cabinet which equates to extended low
frequency response. Structural foam also provides enhanced dampening characteristics which
greatly reduces cabinet resonance.
New cabinet design provides many benefits – Due to the radical design of the cabinet, your VXT
monitors are manufactured using ABS Structural Foam. The Cabinet has inner and outer walls
with a lightweight foam filling. ABS Structural Foam has many advantages over the
standard ABS enclosure. One advantage is the Cabinet can be made with thicker walls. Having
the foam between the inner and outer hard shells acts as a damper and reduces the potential of
resonances. Another advantage is that the walls can be thinner than they would be in MDF. This
allows for more internal volume allowing the system to extend its lower frequency capability. The
third advantage is that there are no parallel internal walls. This eliminates standing waves and
or nodes which are extremely detrimental to the internal and external acoustical response of an
enclosure. These characteristics aid in eliminating the cabinet from potentially coloring the
sound of the speaker system.
Active Filter Crossovers - The VXT series power amplifiers contains three active filters.
(Subsonic, low-pass and high-pass filter) These three filters work together to provide a
seamless integration of the driver components ensuring a smooth spectral balance.
Bi-amplifier Design– KRK’s amplifier consists of audiophile grade components and a
simple audio path for transparency. Output power is balanced to match LF and HF driver
sensitivities and power handling. Your VXT monitors use a toroidal power transformer for low
hum and minimum noise.
Contoured Faceplate – Like the KRK flagship close-field monitor, the Exposé, all cabinet edges
and port openings are heavily contoured to reduce diffraction resulting in better detail and stereo
imaging. The curved faceplate offers improved off axis dispersion aiding in off axis imaging
Slotted Ports – Slotted ports reduce the port turbulence and distortion commonly found in
poorly designed round ports.
Defeatable Limiter - The monitors contain a limiter circuit which provides improved
protection. The Default setting for this switch will be in the OFF position. The limiter is designed
to mitigate the negative effects of over driving the amplifier and or the speaker’s drivers. The lim-
iter, when engaged, can greatly reduce the risk of harming a driver. It can however be defeated
using the “Clip Indicator/Limiter Switch” on the rear panel. This is only recommended if you are
using your monitors well within their limitations. Use the indicator on the front baffle to help
determine the optimum level without audible distortion.
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