A
NTI
-M
ODE
8033C
INEMA
4.3. Input Level Warning
If the input signal level in the Anti-Mode 8033's Analog to Digital Converter (ADC) is near the
maximum input range, the user is warned in two phases. If the input signal level has only 3
dB of headroom remaining, the BYPASS LED will start flickering. If the level increases from
this, the signal starts to saturate at the ADC input and harmonic distortion increases. If the
input level reaches maximum, the LIFT35 LED starts flashing. When the input level is
reduced the LEDs resume normal operation.
The input level warning is useful in optimizing the signal level that goes into the Anti-Mode. If
the volume of your subwoofer is too high, the AVR's calibration may set unnecessarily low
levels for the subwoofer output. This leaves much of the Anti-Mode's available input range
unused and can cause an audible low level hum or noise from the subwoofer. This may be
the case if your AVR indicates its subwoofer output level is below -3dB.
To take advantage of the full input range of the Anti-Mode, decrease the subwoofer volume
and increase the output level from the pre-amplifier or AVR until you see only occasional 3dB
warnings, then lower the volume a few dB.
The level warning is also active during calibration. During calibration the output level is
decreased automatically if needed (microphone is saturated). The LIFT25 LED flashes to
indicate the progress of calibration.
4.4. Output Level Warning
The new Anti-Mode correction will raise the overall level of the output depending on how
drastic corrections were applied. This increase and an active lift mode can increase the
output level in some frequencies so much that the signal gets saturated in the output. In this
case the LIFT25 LED starts to flicker, and you should decrease the Anti-Mode 8033 input
level or turn off lift mode.
4.5. Powering Up and Down
The Anti-Mode 8033Cinema has almost no power-on and power-off transients, so you can
easily power it on and off using a switchable power cord or the switchable power output from
your AVR.
The Anti-Mode also fades in when the signal starts, so it can be powered on without
transients even while the audio signal is already applied to the input connector(s).
Because the Anti-Mode consumes very little power, you may choose to leave it powered on.
Rev. 1.9
2012-03-20
Page 10 (12)
