BSS Audio FDS366T OMNIDRIVE User Manual page 14

Features
• Alignment Assistant
The Alignment Assistant is an advanced loudspeaker measurement
function built-in to the FDS-366T for directly measuring the delay and
phase relationships between drivers (using a measurement microphone),
and automatically adjusting the settings to accommodate these.
The Alignment Assistant has the ability to 'see' past the crossover filters,
and is thus able to compensate for the drivers and enclosures
themselves, leaving the crossovers to do exactly what they were
intended to do - presenting a precisely aligned acoustic wavefront.
The Alignment Assistant can measure and compensate for:
- Physical alignment of drivers within an enclosure.
- Driver or enclosure phase anomalies near the crossover point.
- Relative distance correction of arrayed boxes.
• Advanced Limiters
Driver protection limiters have always been a balance between
protection, transparency and the preservation of maximum power. The
all-new limiter algorithm in the FDS-366T not only allows the user the
freedom to change the way the compromises are balanced, but
introduces several new features which enable the requirements to be
met with less sacrifice.
- Feed-forward design for better stability.
- Adaptive attack, so that attack time is reduced the further over
threshold the signal strays. This helps to preserve transparency for
light overshoots, but acts more aggressively if the signal strays too
far.
- Adaptive release, so that short-term overshoots do not reduce the
average power output, whilst keeping distortion low on sustained
over-threshold signals.
- Adjustable attack speed (fast/med/slow/dual) - but still related to
the high-pass crossover frequency.
- Adjustable release speed (fast/med/slow) - but still related to the
high-pass crossover frequency.
- Brickwall overshoot limiter. This is actually a soft-clipper which
constrains signals which overshoot during the attack phase. The
user has adjustable 'overshoot' from 1 to 12dB (and off).
- Dual time-constant mode for giving simultaneous protection
against short-term mechanical damage or clipping, and longer
term thermal damage.
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FDS-366T