JBL SDEC-4000, SDEC-3000 Channel Output, Level Matching Multiple Surround and Subwoofer Channels

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6.3.4Channel Output

Use each output to adjust each channel to give the same output level using an SPL meter.

6.3.5Level Matching Multiple Surround and Subwoofer Channels

The SDEC-4000 has multiple outputs for Subwoofers and Side Surrounds. These will need to be level matched to each other before final output levels are set.

1.Using the internal noise test of the SDP test each output individually. It will be necessary to mute the output you are not testing. Make sure the Trim Link is off (not RED).

2.Once you have set each to the reference level (75dB) enable the Trim Link feature so that the led turns RED.

3.With all the multiple channels un-muted test together and adjust the output to reach the same reference level. You will now have an output that has all the multiple channels level matched and the overall output set to the reference level.

Figure 14.

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SDEC -X000 DACS Calibration Manual v1.0.doc

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Contents SDEC-3000 SDEC-4000 Speaker Setup Screen Sdec -X000 Dacs Calibration Manual v1.0.doc Equipment Required IntroductionCalibration Checklist Audio Connections Sdec Hardware ConnectionSDEC-4000 with Bi-Amplified Fronts Initial Network Connection Ethernet ConnectionUsing the Java Remote Software Operation using the Java RemoteNetwork Control Panel Software Operation using London ArchitectLondon Architect Software Setup Initial Software Connection toHiQnet Node Address Firmware UpgradeDesign Configuration Opening from a Network DeviceSpeaker Configuration and Instructions Online ModeEQ Controls Channel Delay Speaker Distance Offset Correction Level Matching Multiple Surround and Subwoofer Channels Channel OutputMain Speakers Speaker Phase Test1 S4Ai configured as Bipole default Speaker Sound CheckCricket-R Using the Phase TesterDipole Surrounds Direct Radiating Point Source SurroundsDigital SLM Instructions Setting Output LevelSetting Levels before Calibrating Using the SPL MeterDacs Hardware Setup Dacs Measurement SystemChannel Test and System Calibration Saving Your Work Recalling Saved SettingsParameter Synchronization Advanced FeaturesMultiple EQ Presets Cinema/Music Subwoofer OutputSdec -X000 Dacs Calibration Manual v1.0.doc Troubleshooting Guide Sdec -X000 Dacs Calibration Manual v1.0.doc

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SDEC-4000, SDEC-3000 specifications

The JBL SDEC-4000 is an advanced digital signal processor designed for professional audio applications, offering a range of features tailored for optimizing sound quality in both live and installation settings. This powerful device is equipped with cutting-edge technologies that elevate the audio experience through precise control and manipulation of audio signals.

One of the standout features of the SDEC-4000 is its high-performance 32-bit DSP engine, which allows for complex audio processing tasks to be executed seamlessly. This means sound engineers can utilize precise adjustments without any degradation in audio quality. The processor supports various crossover types, making it versatile for different speaker configurations and ensuring proper frequency distribution across audio systems.

The SDEC-4000 comes with comprehensive networking capabilities, supporting both Ethernet and USB connections. This enables easy integration into larger systems while allowing for remote control and monitoring via a user-friendly interface. The device also supports various audio protocols, including AES/EBU and analog inputs, providing flexibility for connecting with multiple sources.

A vital aspect of the SDEC-4000 is its extensive array of built-in algorithms for equalization, compression, limiting, and delay. These tools empower sound engineers to tailor the audio output precisely to their requirements, whether it’s for a concert, a theater production, or a permanent audio installation. With up to 20 channels of processing, users have the freedom to fine-tune each element of their sound system individually.

In addition, the SDEC-4000 features a robust and intuitive graphical user interface that simplifies programming and adjustments. Users can visually represent their audio setups, making it easier to manage complex configurations. The processor also includes comprehensive diagnostic tools, ensuring that any issues can be quickly identified and resolved, thereby maintaining optimal performance.

Furthermore, the device is built with durability in mind. Its rugged construction ensures reliability even in demanding environments, making it a trustworthy choice for both touring applications and fixed installations. The JBL SDEC-4000 is not just a technical marvel, but a comprehensive solution designed to meet the diverse needs of audio professionals, setting a new standard in digital signal processing technology.