16. FAQ
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LUCIA Operation Manual rev 1.2.0
16. FAQ
Is the LUCIA power stage inherently bridged as on E Series, thereby allowing asymmetrical loading?
to use power on one channel that is not being used on the other, as with Lab.gruppen’s E Series. However, the
channels are
automatically optimized
when it comes to peak voltage, enabling one channel to deliver the full
rated power into 2 ohms and the other channel into 8 ohms.
This is the level at which the input signal will reach full level on the input to the DSP. Above this level, the signal will
be severely compressed by an analog soft-clip circuit.
How many inputs can be driven by a LUCIA M line output?
Each LUCIA balanced line level output can drive up to 6 inputs in parallel; these can be any combination of LUCIA,
ts).
Why is there latency (delay) through LUCIA?
The latency through a LUCIA is 9.15 ms (acoustically equivalent of 10 ft or 3 m). This is primarily due to the look-
ahead limiters and to the multiband mastering compression used in our ADLC algorithm, which adjusts for the
nonlinearities of the ear (ISO226). The 9.15 ms of latency is below what is detectable as out-of-sync when used in
video sound applications. Nevertheless, in some applications, it is preferable to drive multiple LUCIA units in parallel
ill result in incremental delays.
What limiter circuits are incorporated into LUCIA, and how do they operate?
• Short term (<60 ms), look-ahead voltage peak limiter - The threshold of this limiter is automatically trimmed by
deliver. In LUCIA two output low impedance models, alternate presets may be used that designed for a
lower power output than the full output allowed by the default preset.
• Medium term limiter - This limiter is inserted to avoid clipping if the power supply rail sags.
• Long term (>0.5 s) - This limiter is inserted to prevent thermal problems.
