Wisdom Audio Wisdom & Sage Series SC-1 - Manual (Page 44)

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the midrange and treble regions is a powerful tool that allows you to “home in”
on a good setting that is specific to the room at hand prior to MultEQ Pro doing
the finer adjustments.
As an example, we have seen rooms that worked perfectly at the recommended
starting setting of a –9 dB HF Trim for the L75i, and another room that required
only –2 dB for the exact same speaker. (This was a traveling demo system one
of our salespeople was taking from one dealer showroom to the next.) Without
the ability to get the system in the right “ballpark” for these extremely different
rooms, even MultEQ Pro would have been hard-pressed to yield the results we
were looking to achieve.
As an example, we’ll look at the same system, in the same room, with three dif-
ferent HF Trim settings, showing both Before and After results using the View
Results... button. To keep things simple, the microphone was never moved (not
recommended for normal calibrations).
First up is an L75i system with the HF Trim untouched, at 0.0 dB. You can see
that the planar section is significantly louder overall than the woofer section.
MultEQ respects what it interprets as a low frequency roll off, and there is little
energy below about 150 Hz.
This manual suggests an HF Trim of -9.0 dB for the L75i; so our intrepid installer
realizes his mistake and resets the system accordingly. The resulting curve now
looks like this:
While this isn’t bad (and would be further improved by measuring more posi-
tions in the room), it is probably overkill in this room. You are losing more
dynamic headroom in the system than is really necessary by pulling down the
planar magnetic drivers by the full 9 dB. This would be even more true if there
is a subwoofer in the system, since it would be reproducing all the deep bass.
Looking at an HF Trim setting of -5.0 dB yields the following, with the same mi-
crophone position.