12614 SETUP BASS MANAGEMENTThis chapter explains how to setup bass management in the SDP-75.The SDP-75 provides very flexible options that help you to optimally configure the bass managementof your system. You can specify how the lower frequencies of each channel will be reproduced by oneor more subwoofers.In other words, individual speakers can be bass-managed with any combination of subwoofers andspecific crossover frequencies.NOTE:• The SDP-75 supports any number of subwoofers as long as enough physical outputs andprocessing channels are available, therefore allowing for a maximum flexibility in the speakersystem design.• Bass Management can be activated even if the system has not been calibrated. However, theautomatic time-alignment of the subwoofers is only performed after a calibration of the wholeset of speakersIMPORTANT NOTE:• For optimal results, the bass management should be setup manually based on the acoustic measurementsof the speaker responses in the room.• The Bass Management results do not impact the Optimizer graphs.14.1 OVERVIEW OF THE BASS MANAGEMENTSETUP PROCEDUREThe recommended bass management setup procedure is as follows:• Analyze the acoustical graphs of the speaker measurements in order to understand the low frequency responseof each speaker in the room;• Decide whether bass management is necessary or not. It is always necessary when using one or moresubwoofers.• To activate bass management:1. Identify the High Pass Frequency that seems appropriate for each channel. 80 Hz is usually the bestchoice.2. Configure the bass management options (Off, On, On + Lfe to lr);3. Configure each channel to be bass-managed by one or more subwoofers.• Last but not least: Save the preset.The Bass management is divided into 3 different sections represented as 3 tabs which will be detailed in the followingchapter:• Quick Setup: The Quick Setup is the default section of the Bass Management. It allows a global configuration byapplying values on several speakers and subwoofers simultaneously (It is not enabled if Bass-Management is Off);• Individual Setup: The Individual Setup provides the ability to adjust the settings on each speaker and subindividually (It is not enabled if Bass-Management is Off);• LFE & Misc: This section allows adjustment of the LFE gain, polarity, Low-pass filter type, Low-pass frequency,slope, as well as enabling the standard +10dB LFE input and stacked sub correction.
