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LMS-D6
LMS-D6 user manual
Page 11
LMS-D6 CONFIGURATIONS
Introduction
To simplify set-up of the LMS-D6, 5 crossover modes are menu selectable. These all have
parametric equalisers, high and low pass filters, limiters, gain and delay. 2 x 3 way and 3 x 2 way
crossover modes have the option available to provide precise 'ganged' parameter adjustment for
stereo sources.
Crossover Modes
All crossover modes feature adjustable crossover frequencies with a choice of slopes, 5 bands of
driver compensation E.Q. per output and delay time plus limiters for each output. Phase reverse is
also provided for each output.
Filter slopes
A choice of Bessel or Butterworth slopes at 12/18/24dB per octave and Linkwitz-Riley at 24dB per
octave are provided. Since Low and High pass functions are separately adjusted, asymmetric
slopes are easily achieved, if required. It should also be noted that the turnover frequency
displayed on the LMS-D6 is the -3dB point for all slopes except 24dB Linkwitz-Riley where the -6dB
point is shown. If the -6dB point is to be used for the Bessel or Butterworth filter, take the required
crossover frequency, multiply this by the appropriate factor from the following table and then
select the closest available frequency on the LMS-D6's display.
Filter Type
Filter TypeFilter Type
Filter Type High pass filter factors
High pass filter factorsHigh pass filter factors
High pass filter factors Low pass filter factors
Low pass filter factorsLow pass filter factors
Low pass filter factors
Bessel 12dB/octave 1.45 0.69
Butterworth 12dB/octave 1.31 0.76
Bessel 18dB/octave 1.37 0.73
Butterworth 18dB/octave 1.19 0.84
Bessel 24dB/octave 1.35 0.74
Butterworth 24dB/octave 1.15 0.87
Please note that unlike conventional analogue crossovers, crossover points and slopes are set
with absolute accuracy since component tolerance problems do not occur.