Processor Use: Configuring the Processors (3-way Mono Stack)

Example 2- Active 3-way Mono Stack

In a 3-way configuration, the Top Box amplifier’s two channels are used for low- and high-frequencies and the subwoofer handles bass. The Processors perform the required crossover and time delay functions.

This Top Box configuration has time delays included in the DSP chain to align the impulse response of the audio. The upper signal chain is tuned for a 100 to 1200 hertz pass band and the EQ block compensates for any driver/ cabinet resonances. The lower signal chain is tuned for 1200 hertz and higher with back-to-back high-pass filters and EQ for any required compensation.

The Subwoofer Processor would be configured similarly to the example on the previous page. Normally, the Top and Sub processors receive the full range signal and extract their respective frequency ranges.

3-way Mono Stack Checklist: There are two ways to handle the signal routing for this application. In Discrete Mode, two input cables are required, but if you have the option of controlling input signal levels of each, the overall subwoofer level can easily be adjusted on the fly. In Combination Mode, only one input cable is required since the Top Box Processor’s CH1 Input is also connected to the Subwoofer Processor (IN1 block). Any changes to input signal level will now effect both the MF/LF and subwoofer channels. Changing subwoofer gain requires Signal Manager and a computer. Bass level should be managed with EQ.

Combo Mode (preferred)

 

Discrete Mode (optional)

1- Configure Top Box Processor.

 

1- Configure Top Box Processor.

2- Configure Subwoofer Processor.

OR

2- Configure Subwoofer Processor.

3- Set Mode Switch to Combination.

 

3- Set Mode Switch to Discrete.

4- Connect the input to CH3 Input XLR.

 

4- Connect the input to CH1 Input XLR.

5- Test and adjust as required.

 

5- Connect the input to the Input 3 XLR.

 

 

6- Test and adjust as required.

 

 

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QSC Audio ISIS 215PCM user manual Processor Use Configuring the Processors 3-way Mono Stack

ISIS 215PCM specifications

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