Setup Bass Management; Overview Of The Bass Management Setup Procedure - JBL SDP-75 User Manual

14 SETUP BASS MANAGEMENT

This 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 management
of your system. You can specify how the lower frequencies of each channel will be reproduced by one
or more subwoofers.
In other words, individual speakers can be bass-managed with any combination of subwoofers and
specific crossover frequencies.
NOTE:
•
The SDP-75 supports any number of subwoofers as long as enough physical outputs and
processing channels are available, therefore allowing for a maximum flexibility in the speaker
system design.
•
Bass Management can be activated even if the system has not been calibrated. However, the
automatic time-alignment of the subwoofers is only performed after a calibration of the whole
set of speakers
IMPORTANT NOTE:
•
For optimal results, the bass management should be setup manually based on the acoustic measurements
of the speaker responses in the room.
•
The Bass Management results do not impact the Optimizer graphs.
14.1 OVERVIEW OF THE BASS MANAGEMENT
SETUP PROCEDURE
The recommended bass management setup procedure is as follows:
•
Analyze the acoustical graphs of the speaker measurements in order to understand the low frequency response
of each speaker in the room;
•
Decide whether bass management is necessary or not. It is always necessary when using one or more
subwoofers.
•
To activate bass management:
1. Identify the High Pass Frequency that seems appropriate for each channel. 80 Hz is usually the best
choice.
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 following
chapter:
•
Quick Setup: The Quick Setup is the default section of the Bass Management. It allows a global configuration by
applying 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 sub
individually (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.
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