Krk VXT Series Manuel d'utilisateur télécharger pdf (Page 5)

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

requency 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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Krk VXT Series Manuel d'utilisateur Page 5

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