Dynamic Filter
frame: the Dynamic filter is in facts a Dynamic Loudness which is a Dynamic Filtering
boosting automatically the Input level on Low and high Frequencies on the base of the Input Level
RMS value. Particularly the boost is applied with a couple of Bell filters with different small Qs [pretty
wide BW] centered at 50Hz and 12kHz. At these 2 frequencies the boosts have different amount: the
boost on Lows at his maximum r7dBV when the input signal is -28dBV from its max and the
boost on Highs reaches its maximum boost with +3dBV. The amount of boost on the Lows and highs
can anyway be tuned with sliders controlling in percentage the boosts amounts independently. The
following table gives the details about the Boost amounts per Low and High frequencies in relation
with the Input Signal level.
The table has to be read as follow...
The 2dBu, 0dBV, represent the Input Level at the one the boost on both Lows and Highs stops,
maintaining a constant value up to the Max input level of 12dBV. The level of -16dBu, which is -18dBV,
is the Input Level at the one the Boost for both lows and highs reaches its maximum and remain
constant for the all lower input signals.
ADC Headroom [12dB]
frame: checking the ADC Headroom box, an internal process is made active,
which is allowing to have onto the
PDA500PF
A/D converters a +12dB headroom. This means that the
MAX output level of the Amplifier is reached yet when the input signal is at -12dBu from the Max
accepted level accepted by the A/D converters. Each increase of the Input level in front of the A/D
from the -12dBu, is contained by an internal Clip Limiting process. This feature is allowing to get then
the Max power delivered by the Amp when still 12dB of Headroom are available on the Inputs, so
allowing to have already the Max Power performances and avoid Clips there where the input signal is
Exceeding the -12dBu from the max acceptance.
Summary of Contents for PDA500PF
Page 6: ...Processes Block Scheme...
