Xover Section
The Xover Section of the LPP260A it is a particular and pretty powerful one, which can even become
“tricky” if used in combination with the Parametric Eq.
Basically the PURE Xovering Section can be in standard operation, operated by IIR filters or FIR filters.
The FIR filters used for the Xover Section are 512 Taps ones and therefore cannot be used for cutting
frequencies lowest than 250Hz.
Actually has to be said that the LPP260A is working at a sample rate of 96kHz, but the FIR both on the
Input path (the Phase Correction one) and the outputs, are processing with a decimation factor of 2 ,
so running at 48kHz.
Back the the Xover, for cutting frequencies lower than 250Hz, of for any other reason coming from
the user, IIR classic Lp/Hp filters can be used.
IIR Xover
If selecting IIR in the “Select IIR/FIR” frame, the Xover section is implementing IIR Hp/Lp, and the
interface for the IIR filters setting is the following
To edit the Hp or LP filter cutting frequency, input the value on the text box and press enter
(Frequency from 20Hz to 20kHz step 1Hz)
To edit the Hp or LP filter type and slope, click on the relative Box and select the type (bypass,
Butterworth, Linkwiz Riley, Bessel)
