How about this : Open AA (Audio Architect); Load a Room with an XTI1 (first gen) and an XTI2;
Open the XTI2 panel;
Locate the File/Device Load menu item and load the PRX400 presets;
Click the RECALL button and load the PRX415 device preset;
You now have 'access' to most of the preset's configuration settings.
Make a note of the required configuration settings and write them back into an XTI1 preset.
And there you go!
Make sure that the XTI has the 'DSP OFF' preset selected with no configuration settings.
Power up the amp : After a few moments (boot-up), you should have only the Ready indicators on.
Power down; Connect stereo/dual signal source wires to the XTI; Also, connect a pair of speakers to the XTI;
Power up : Apply some signal to both inputs of the XTI :
- The Signal indicators should now lit;
- Increase the level controls to a satisfactory listening level;
- You should have sound coming through both speakers.
If not : You should have only one side (one speaker) operating;
Confirm that both Signal levels are modulating the level indicators;
If not : Swap input connections : Did the signal switch side?
If so, verify cables and signal source;
If the signal didn't switch side : swap speaker connections; Did the signal switch side?
If so, verify the speaker, speaker wires and connections;
If not, the amplifier may be at fault. Bring it back to your authorized Crown dealer for service.
Perhaps you could try this :
Use a normal 2 way xover (crossover) processor for mono operation; If necessary, use a stereo xover processor for dual operation;
Seperate bandwidth for SUB and the REST (for example, crossover at 80Hz);
Send SUB signal to the SUB amp; Use Bridge mode, if necessary;
Send REST to the other two amps (LEFT AND RIGHT); For each amp, apply/create a xover preset for MID and HIGHS;
Of course, this entails having a crossover processor!
Does the unit operate well (pass signal) in Dual mode and preset DSP OFF?
When the unit has finished booting up, the Ready indicators should come on.
With signal coming in, the Signal led (second led from bottom) should be lit. If it is not, verify and confirm you have signal coming to the XTI.
If you take a look at the linking mechanism of the XTI input section, you will notice that it is linked directly with the input jacks. The DSP sections are way down stream of the links, and thus why you still have the LF coming in to your other units. A SUB crossover doesn't cross over to the other units and can only be used with the current amp.
Unfortunately, there is no mechanism on the XTI unit to have acccess to the post processing of the DSP.
If you require better crossover functionality using this XTI system, I would suggest to use, for instance, an external processor such as the dBx Driverack or Crossover unit.
Note : If you were to use this XTI system as is, with its internal crossovers, then link all [pertinent] inputs, and for each ammplifier, construct the crossover for the bandwidth projected.