Preliminary remarks
Fine set and Phase delay
Delay assignment according to distance calculation is theoretical.
Small variations must be applied due to small errors in distance measurement, back-wave reflections inside the car
and, primarily, the speaker phase problem.
Two speakers reproducing two frequency areas that are close to each other (e.g.: Woofer and Midrange) will
simultaneously reproduce the same frequencies in their crossing area, at a attenuated level. Due to the different
nature of the speakers, they will have a phase difference that, for a short frequency interval, acts as a time delay.
By using "fine set", you can partly correct these Phase Delay problems.
By using the "fine set" button, you can change the
automatically set delay time.
The delay is increased (+x.xx) or decreased (-x.xx) by
the delay value shown in the window "Delay/default" and
does not change the value shown, which is the one that
is automatically assigned.
Assigning a positive value (+x.xx) using "fine delay"
means increasing the delay for that speaker and thus
moving it farther away from the listening point.
Likewise, assigning a negative value (-x.xx) means
decreasing the speaker delay and thus moving it closer
to the listening point.
In order for you to see how much “Fine Set” has been
manually changed, both delay values are shown. To see
the resulting delay, physically applied to the output, you
have to add the values shown in the “Delay / Default” and
“Delay / Fine Set” boxes. A negative value (decreasing
the delay) can not be assigned to the farthest speaker; it
can only be assigned to the other speakers as they are
all already delayed compared to the farthest one. If you
attempt to give the farthest speaker a negative value, a
warning message will appear
(Fig. 1).
When using "fine set" "fds" will appear in green on the
corresponding channel on the "Channel Map"
(Fig. 2)
Example of setting the time delay (Fig. 3):
1. Choose the system listening point.
To identify the listening point, choose an
ideal spot in the center of the listener's head
(driver or passenger).
For the front center and rear center, choose a
point between the two listeners.
2. Measure the distance in a straight line from each
speaker or group of speakers compared to the
listening point. For each speaker, choose the center of
the mobile membrane as the emission point.
For groups of speakers, choose a point between them.
It will then be possible to fine tune it using the Fine Set
function.
3. On the Channel Map, select the channel related to the
speaker under examination and enter the respective
distance in the Set Distance box in the Filter Settings menu.
4. Repeat step 3 for each channel.
106 cm
106 cm 116 cm
106 cm
105 cm 105 cm
164
cm
90 cm 90 cm
(Fig.1)
(Fig.2)
(Fig.3)
7
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