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Specify the number of parametric filters required by selecting "1", "2" or
"3" on switch S7.
The markings on the filter control dials are approximate and for guidance
only.
Set the individual filter gain controls (S8, S9 & S10) to -6dB.
Set the individual filter Q controls (C5, C7 & C9) to 4.
This enables the centre frequency response of the filters to be seen.
Set the individual filter frequency controls (C6, C8 & C10) initially to 25Hz.
This keeps the filters away from the frequency range of interest until they
are tuned one at a time to compensate the frequency response.
NOTE:
The P1, P2 and P3 frequency controls work counter-clockwise to allow for
ease of setting.
Turn the filter frequency controls (C6, C8 & C10) to the centre frequencies
of the peaks or dips to be equalizsed. This is an approximate initial
setting.
Take repeated frequency response measurements to see the effects of
the adjustments you are about to make. Every now and then you may
wish to discard plots and this may be done by unchecking those you do
not need on the plot list to the right of the screen.
Adjust the filter centre frequencies until the measured dips in the response
line up accurately with the centres of the peaks or dips originally in the
response.
Adjust the filter gain switches (S8, S9 & S10) so that the response at the
centre frequency of each filter is at the target level (the desired smoothed
level).
Lower the filter Q controls (C5, C7 & C9) to broaden the range of the filters
until the response is as smooth as possible.
The controls are to some extent interactive and it may be worthwhile going
round the loop of checking the control settings a second time.
Adjust the LF and HF contour controls, C1 and C2, as appropriate.
Additional low frequency response adjustment may be achieved by
altering the subwoofer gain (C4) and filter frequency (S5). Additional low/
mid frequency adjustment may be achieved by altering the LF gain (C3).
If you need to equalise another speaker, you must reload the
CT800 setup within WinMLS and repeat the above process.
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