11012 CALIBRATE THE ACTIVECROSSOVERS (OPTIONAL)This chapter explains how to calibrate the active crossovers included in the SDP-75. It assumes thatyou are familiar with active crossovers and multi-amplified speakers, and is not intended as acourse. If you are not using the active crossover functionality of the SDP-75, please skip tothe next chapter.IMPORTANT NOTE: Carefully read carefully the entire chapter about the SDP-75 Essential Tools andSettings that you will be using throughout the calibration process.NOTE: Master 44.1 kHz or 48 kHz clock modes should be used for calibration (Master 48kHz highlyrecommended).Figure 74: Overview of the active crossovers signal flow12.1 OVERVIEW OF THE CROSSOVER SETUPPROCEDUREThe overall setup and calibration process of the SDP-75 active crossovers is performed through two different tools:• Use the Speaker/Room Setup Tool to:• Configure the number of ways and the crossover frequencies;• Verify the routing of the SDP-75 outputs to the correct drivers.• Use the Setup/Active Xovers page of the Advanced Settings interface to:• Configure the advanced crossover settings such as specific frequencies for each driver and the type of filters(optional);• Use the Processor/Meters page to adjust the master output level;• Perform the automated calibration of the active crossover: this will automatically determine the level, delay andpolarity of each driver;• Manually adjust levels, delays and polarities of each driver.The first 2 steps of this process were explained in the previous chapter. This chapter explains the next steps.
