K.M.E. VSS 18, User Manual

Page: 3 / 36

3
3. The digital system unit VSS 18
The fully digital system unit VSS 18 with integrated 18“ subwoofer has been
consequently developed to portable requirements. With a powerful bass base and very
compact dimensions as well as the lightweight of 34 kg, the VSS 18 is also the core and
control center within the self-powered PA-systems SD 7, SD 8 and also in directional
radiating active bass arrays.
Inside work a digital 24 Bit signal processor and three powerful class D amplifiers with an
unsophisticated, crystal-clear sound quality (without conversion losses due to full digital
preamping). The analogue input signal is digitalized directly inside the input amplifier
using an intelligent 24 Bit AD-converter and remains consequently digital to the class D
amplifiers` output. The audio-DSP enables an optimal processing and controlling of the
audio signal through adjustable parameters like gain, digital cross-over, subsonic filter,
parametric EQs, peak/RMS-limiter, phase (180°) and delays. It serves also for a flexible
signal routing of the loudspeaker outputs (e.g. for top units / monitors / subwoofer).
Factory presets and user presets can be choosen, loaded and adjusted through a
navigation pad with a clear controlling sheme.
The integrated 18“ subwoofer provides a low-frequent radiation starting from 40 Hz to
160 Hz. The special tunnel geometry enables a high sound pressure
with extra low
power compression and a low flow noise. The digital controlling enables a directional
(cardioid) dispersion (depending on preset) with a front-to-back damping of more than
20 dB in a wide frequency range. The subwoofer can be used in bigger production
surroundings (e.g. big indoor events) and also smaller installations.
The high-quality scratch- and impact-resistant black polyurethane coating offers optimal
road suitability. As an option you can choose a detachable and lockable roller base or
protective cover for protection. An additional protection of the loudspeaker offers the
comb-grid with acoustic foam and the special impregnation of the loudspeaker
membrane against moisture impacts.
4. The delivery status
The scope of delivery includes: 1x VSS 18, 1x PowerCon-mains cable & user manual
When you power up the VSS 18 for the very first time the following default parameters in
the main menu are pre-set:
-
preset 1 „SD 7 OMNI“ is loaded
-
Sig. LED threshold is adjusted to -50 dB
-
User LED threshold is adjusted to 0 dB (0 dB = deactivated)
-
output levels are shown on the LCD display
-
inputs switched to analogue
-
a password is not entered
This User Manual corresponds to the software version V1.0 r87.
It is obvious in the menu item „Diagnostics“!