Using the Phase Tester, Dipole Surrounds, Cricket-R

8.2.2Dipole Surrounds

Regardless of model there is one standard for phase configuration of Dipole surrounds.

Figure 16.

8.2.3Direct Radiating Point Source Surrounds

Figure 17.

8.3 Using the Phase Tester

The Galaxy Audio phase tester consists of two battery operated instruments, Cricket-S is the "sender", and Cricket-R is the "receiver".

are two slide switches and a pulse indicating LED. Slide the ON/OFF switch to the ON position and the output selector to the LO position. You should now hear pops at one second intervals from the speaker under test. If a higher level is required, set the output selector to HI.

8.3.2Cricket-R

The receiver contains a microphone and phase analysis circuitry. Positive polarity is indicated by a green LED, negative by a red LED. Two input connectors and the microphone are located on the rear panel. There is also a switch marked "CON" (continuity) and "POL" (polarity). Place this switch in the "POL" position. On the front panel are two slide switches, a rotary gain control and the two phase indicating LEDs. Slide the right side switch to the ON position and place the left side switch in the MIC position. Now move the receiver’s microphone toward the speaker being tested. W hen you are within three to six inches of the speaker you should begin to see a polarity indication. Adjust the gain control until a consistent indication of phase is realized.

8.3.1Cricket-S

The sender generates a short duration, positive polarity pulse. This is applied to the power amplifier input which drives the loudspeaker being tested. Coincident with the generation of each pulse, a green LED is illuminated. Three output connectors are located on the rear panel. Line level male XLR, line level female ¼" phone jack and a speaker level female ¼" phone jack. A female XLR to RCA adapter cable is provided in the kit. Plug this cable into the XLR connector and use it to connect the sender to each channel for test. On the front panel

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SDEC -X000 DACS Calibration Manual v1.0.doc

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.

JBL SDEC-4000 Using the Phase Tester, Dipole Surrounds, Direct Radiating Point Source Surrounds

Models: SDEC-4000 SDEC-3000