Audison bit One HD User Manual

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USER'S MANUAL
bit One HD /
When “Clip“ lights up in red, it means clipping is occurring on the output channel. When this occurs, you will
just have to decrease the output level of the corresponding channel or decrease the equalization previously
set up. If the “Limiter” function has been applied to the clip the led light will be orange.
By acting on one of the sliders belonging to the output channels, the output level (- 40 ÷ 0 dB) for each
channel can be adjusted
This area of the screen shows the output level of each single channel (- 40 ÷ 0 dB), compared to the slider
position of the output channels
By selecting “Link”, all the bit One HD output levels can be adjusted simultaneously. By selecting “Link” again
the function will be disabled .
By selecting “Solo” the output levels will be muted except the active one. By selecting “Solo” again this
function will be disabled.
The selection of the “Mute” button provides the ability to mute the corresponding output channels.
By selecting “Mute” again, the mute function will be disabled.
By acting on the “Master Volume” function, you can adjust the system general volume (-60 ÷ 0 dB).
The “Subwoofer Level” function allows for the subwoofer output level adjustments (-12 ÷ 0 dB), when the
system features a subwoofer.
The “Limiter” function enables the limiter on bit One HD output level. This function is essential to avoid the
occurrence of temporary clipping, causing the outputs saturation. By selecting “Limiter” again, the function
will be disabled.
This section shows the settings of the output levels of the bit One HD channels as displayed by the software.
Following please note the description of each of the functions marked with numbers in the image above.
8.10 OUTPUT LEVEL
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WARNING:
the output level adjustment (2) affects the system signal / noise ratio (whistle / background hiss). We
recommend that you always set the bit One output at high level and the ampliers’ sensitivity at low level, so
the ampliers will be less sensitive to background noises/hisses. An excessive output level causes the clipping
led lights to turn on (1), especially if equalizations with high gain are applied. Therefore we recommend that you
proceed as follows.
Remark: if the installation includes a mono Subwoofer, the
sensitivity of its dedicated amplier needs to be increased by
+3 dB compared to rest of the ampliers (see the “Ampliers
Sensitivity” diagram).
This empirical method considers many aspects and will provide
an improved adjustment capability of the “Subwoofer Level
a) Adjust the ampliers sensitivity level to the minimum value (3-4V RMS).
b) Balance the emission level of the system channels by moving the sliders (2) paying attention to maintain a
centered mid level at around -20 dB. Turn the output volume to an acceptable listening volume level.
c) Set the desired output equalizations
(see section 8.9) .
d) Insert a CD playing a highly dynamic track.
e) Select the “Link” function (5), move the slider and increase the output channels level until one of the “clipping”
led lights turns on (1); move the slider back of at least 2-3 dB (check the value on one of the displays (3)).
f) Increase the “Master Volume” (6) up to the maximum undistorted level taking it close to “0” dB.
g) In case the signal is highly distorted with the “Master Volume” at “0” dB, the output levels (2) will need to be
decreased. If, on the contrary, no distortion occurs, the ampliers’ sensitivity will have to be increased until the
rst distortion symptoms appear: by doing this, you will make the most of all the available power.
Ampliers Sensitivity (Volts)
Front/Rear 1.0 2.0 3.0 4.0
Sub (+3 dB) 0.7 1.4 2.1 2.8
Remark: this procedure leads the user to calibrate the system at “zero dB undistorted”. This is not always the best
solution, since, if you listen to a track that has been recorded at a lower level or with lower dynamics than the track
used for the setup, a loss in dynamics may occur. So a good compromise needs to be found, depending on the
listener preferences.
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Audison bit One HD Specifications

General

Brand	Audison
Model	bit One HD
Category	Signal Processors
Language	English