Lab.gruppen PLM 20K44 - Manual (Page 100)

Lake Controller Operation Manual Rev 1.5.4
EQ/Levels Menu Reference
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6.4.5.3 Alignment Delay
A linear phase response requires considerable processing; the Alignment Delay function allows a linear
phase response to be used in different circumstances depending on the maximum delay that can be permit-
ted in conjunction with the crossover slope.
Steeper low-frequency linear phase crossovers can be calculated with a longer alignment delay. If a steep
low-frequency linear phase crossover is not required, a shorter alignment delay can be utilized.
The label on this button reads Alignment Delay for linear phase crossovers, and is not applicable for Classic
crossovers or other Module types.
To change Alignment Delay settings:
1. Tap ALIGNMENT DELAY. The currently selected delay setting is highlighted in orange.
2. Tap the required delay setting. A shorter alignment delay equals a shallower linear phase crossover
transition band slope. A longer alignment delay equals a steeper linear phase crossover transition band
slope.
LP2way and LP3way Modules use different Alignment Delay settings than the LP4way.
Table 6-6 shows the highest and lowest frequencies available for the Linear Phase Brick Wall 2/3-Way
Modules, along with associated roll-off per octave at these settings.
Table 6-6: Linear Phase Brick Wall 2/3-Way
Alignment
Delay Lowest
Frequency
dB/Octave
Highest
Frequency
dB/Octave
1.25 ms 500 Hz 13.61 12 kHz 93.37
2.50 ms 250 Hz 11.04 12 kHz 93.37
5.00 ms 125 Hz 11.01 12 kHz 93.37
10.0 ms 62.5 Hz 11.03 12 kHz 93.37
20.0 ms 32.5 Hz 10.84 12 kHz 93.37
40.0 ms 32.4 Hz 14.47 12 kHz 93.37