CPD 12 - HDSP™

By using KS AUDIO own developed HDSP™ waveguide there are two significant differences in comparison to normal CD horns; firstly, the horizontal radiation angle varies depending on the vertical angle, and secondly, the major part of the sound energy is radiated downward in a varies curved wavefront towards the audience, and not towards the walls or the ceiling. 

Several acoustic principles were combined in order to achieve this. The energy of the high-frequency driver is formed in a waveguide with varying path lengths to a vertically curved line, which is then radiated into a horn with a width of 120° in the lower part and 60° in the upper part. 

In the transition to the low-mid frequency membrane, the sound signal is electronically delayed and phase corrected in such a way that the main inclined radiation axis is sustained over a wide frequency range. Likewise, the crossover frequency is selected in a way that the bundling resulting from the diameter of the membrane is equivalent to that of the mid-high frequency horn. 

The CPD 12 compliments the KS AUDIO CPD-Series compact 2-way systems with its small dimensions, and the unique directivity of HDSP technology. The result is consistently even hi quality audio dispersion with the highest sound pressure level, while simultaneously having the lightest weight possible. The power capacity equals this quality: The 12′′-long excursion low-mid speaker can handle 800Wrms and the 1.4′′ driver 100Wrms.

With the CPD 12, particular attention has been paid to a correct transition in dispersion of the HF unit and the 12" woofer. Within the entire dispersion range of the CPD 12, the listener experiences a straight frequency response over the entire bandwidth of the speaker. This is unique for any speaker but very special with the complicated dispersion behaviour of the CPD 12.

Both the 12′′ LF driver and the 1.4′′ HF driver have strong but light Neodymium Magnets. The 3′′ diaphragm of the compression driver consist of a special aluminum alloy that has a clearly reduced distortion factor in comparison to a titanium diaphragm. With the CPD 12, KS AUDIO has responded to the demanding needs of the professional sound engineer with a universally usable 2-way sound system with the highest audio quality, yet in a compact size. There are many applications in

which the CPD 12 can be used: Theatre, Live-stage Music, in large rooms or tents, as a delay system for far away areas, or as a compact mid/high system in conjunction with any KS AUDIO sub woofer.

In the CPD 12, a DSP controlled amplifier is embedded as a slide-in module in the rear panel. It provides the required performance, response correction and safe protection for the loudspeaker. The power stage works with a high degree of efficiency and requires no – often disturbing – cooling fans. The wide-range switching power supply is capable of handling all AC voltages between 110V and 240V. The inrush current is limited by electronic control. Connection is provided via PowerCon F+M connectors which allow daisy-chaining, e.g. to the subwoofer. The digital differential crossover and filter stages are precisely matched to the loudspeakers. An FIR filter, individually tuned for each speaker, provides an unsurpassed equality of the systems. The symmetrical input has XLR F+M connectors.

A special feature is the automatic recognition and switchover for an incoming digital audio signal according to the AES/EBU standard.. In addition to the mains switch, the following controls are available: volume adjustment, EQ settings for individual adaptation to the location, delay in m and ms, a high-pass filter and a selection of the digital audio channel AES/EBU 1 or 2 and DANTE™ (optional!). The settings are clearly readable on a self-luminous displays.

Further settings, such as a parametric equalizer, can be downloaded and saved via the integrated Ethernet switch by the KS REMOTE software. There are many applications in which the CPD 12 can be used: Live-stage Music, in large rooms or tents, in large clubs and usually always with support for the low frequencies with one of the many KS AUDIO subwoofers, we recommend the CPD W1 or CPD W2 Subwoofer.

The CPD 12 is equally suitable for a normal stand as well as a flying assembly.

The speaker cabinet construction is, like all KS AUDIO systems, built from birch plywood with an extremely robust charcoal colored Polyurethane coating. At your request the finish can be changed to any desired color from the RAL color charts. Another special feature are the two multipurpose fittings on the back of the speaker. Allowing the installation of different fly-ware and connectors, which are safely interlocked by means of quick release ball-lock-pins. There is a pole mount in the bottom of the cabinet and a protective steel grill on the front, with acoustic foam.