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3. Digital System Unit VSS 28
The VSS 28 is a fully digital system unit including an integrated 2 x 8" hybrid subwoofer,
a 24 bit / 48 kHz audio DSP and three class D amplifiers (1 x 400 W subwoofer + 2 x 200
W tops). The VSS 28 is extremly compact and very light-weight (21.5 kg). The VSS 28 is
the heart and control centre for compact and freely configurable PA- and installation
systems. The integrated 8" neodymium speakers with a hybrid shell offer powerful and
precise bass sound reproduction starting at 45 Hz up to 160 Hz. The optimized tunnel
geometry allows a high sound pressure level at a low power compression and reduces
the air flow noise to a minimum.
polyurethane coating offers optimal road suitability. An additional protection of the
loudspeaker offers the sound-permeable comb-grid with acoustic foam. Further, a special
impregnation protects the loudspeaker membrane against moisture impacts.
audio DSP and three powerful class D amplifiers which are powered by switch mode with
PFC (Power Factor Correction) work on the inside. For the first time the analogue input
signal is digitalized directly inside the input amplifier using an intelligent 24 bit AD
converter and remains digital until amplified in the class D amplifiers. Thanks to newest
digital technology the dynamic range of the audio signal increases in reducing conversion
losses to a minimum. The result is a sophisticated crystal-clear audio reproduction. The
digital input is based on an AES EBU & S PDIF signal with a sample rate of max. 192
kHz. The powerful audio DSP provides an optimal signal routing and controlling of all
adjustable parameters by using a PC software. There, the Gain, the digital Crossovers
with 12 dB 24 dB per octave, the subsonic Filter, the full parametrical EQ`s, the peak
RMS Limiter and the Delays can be adjusted. By using the three menu item buttons you
can adjust the system settings and load Factory or User Presets (also from SD Card).
Every Factory Preset already offers a wide range of solutions for diverse operating
options and user applications.
4. Delivery Status
When powering up the VSS 28 for the first time the following default parameters are
preset:
Factory Preset 2 „VERSIO SD X" is loaded
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User Presets 1 – 4 are identical with Factory Presets 1 – 4
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Inputs switched to analogue
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Menu Item "Mode" switched to "Neutral"
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Input level can be adapted from -∞ to +6 dB
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The high-quality scratch- and impact-resistant black
A 24 bit
3
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