908.9 CONFIGURE THE CROSSOVER SETTINGS(OPTIONAL)If you want to use the active crossovers of the SDP-75, you must use the speaker configuration table to:• Specify the type of amplification: bi-amp, tri-amp or quad-amp;• Specify the crossover frequencyThe parameters related to crossover settings are the following:• Amplification: sets the number of channels of the speaker in case of multi-amplification• Low freq cut-off: sets the crossover frequencies• for bi-amp, it is set at 2kHz by default;• for tri-amp, they are set at 200Hz and 2kHz by default;• for quad-amp, they are set at 200Hz, 2kHz and 20kHz by default.NOTES:• The SDP-75 handles up to 4-way active crossovers.• The default crossover filters are Linkwitz Riley 4th-order (24dB/Oct).• Advanced crossover settings are available in the Setup/ActiveXovers page of the AdvancedSettings user interface. Further information about the active-crossovers can be found in theCalibrate the Active Crossovers chapter.8.10 MAPPING THE CHANNELS OF DIFFERENTFORMATSThe new Immersive Audio Formats (Auro-3D, Dolby Atmos and DTS:X) come with different channel labels and differentspeaker placement recommendations. This causes incompatibility issues that could make it difficult to play the requiredcontent correctly.In the SDP-75, each speaker can be assigned to a specific channel for each format in such a way that it will play therequired content regardless of the format being decoded.In the example below, one speaker was set as the “Top” speaker recommendation of Auro Technologies to reproducethe content of the Auro-3D Top channel (“voice of god”). This channel also exists in DTS:X as the “Oh” channel but doesnot exist in the Dolby Atmos format. Therefore, this speaker will not be used during playback of native Dolby Atmosformats.Figure 63:Channel mapping example for the Top channel
