8.4 Speaker Preset Menu
Parameters
•
The
[Crossover & Gain]
preset menu enables high or
low-pass crossover filters and gain adjustment to be
applied to individual amplifier outputs.
•
The
[Speaker EQ]
preset menu enables parametric
equalization to be applied to individual amplifier outputs.
•
The
[FIR]
preset menu enables FIR (Finite Impulse
Response) based equalization filter coefficients
generated by external speaker measurement software
to be imported and applied to individual amplifier
outputs.
•
The
[Driver Alignment]
preset menu enables delay to
be applied to individual amplifier outputs.
•
The
[Polarity]
preset menu enables the polarity of
individual amplifier outputs to be reversed.
•
The
[Limiter]
preset menu enables signal limiting to
be applied to individual amplifier outputs. Clip limiting,
peak limiting and RMS limiting can be individually or
collectively engaged. The Peak limiter can be set to
either automatic or custom parameter values. The
RMS limiter has default parameter values that can be
adjusted but has no automatic option.
•
The
[Output Mode]
preset menu enables individual
amplifier outputs to be switched off or configured for
Lo-Z, Hi-Z or Lo-Z BTL modes. In Hi-Z modes, a high-
pass filter can also be configured and applied to the
output. The number of outputs available will depend
on the input setup and zone setup. For example, a two
output amplifier will have two outputs available if Lo-Z
mode is selected but only one output available if Hi-Z
mode is selected.
NOTES
FIR coefficient files in either .csv or .txt format can be
imported.
In automatic mode, the peak limiter parameters adjust
automatically in response to Crossover & Gain high-pass
filter settings.
In Lo-Z BTL (bridge-tied load) mode, two amplifier output
channels are combined to create a single, double power
output channel.
Use of a high-pass filter with Hi-Z mode loudspeakers is
useful to avoid the possibility of distortion caused by low
frequency line transformer saturation. Begin with the
default filter setting of 70Hz. If low frequency distortion is
still audible, increase the frequency setting one step at a
time until the distortion is no longer audible.
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