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dakos

Member Since 05 Sep 2011
Offline Last Active Today, 02:34 AM
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Posts I've Made

In Topic: crown xls 1000

27 July 2014 - 02:08 PM

Great to hear :)

I'm sure Alain will be pleased as well :)

In Topic: 2.67 ohm operation in bridged mode XLS2500

23 July 2014 - 09:38 AM

I've looked into this subject and if I understood correctly you'd be better off using the processing built-in the X32 for the simple needs you have and let the DRPA collect dust somewhere. Just put the presets for the JBL speakers you have into the X32.
Avi

In Topic: 2.67 ohm operation in bridged mode XLS2500

21 July 2014 - 10:23 PM

Hello and welcome,
Running the amp this way is not a good idea. I guarantee you, it doesn't sound better, it just sounds louder. I would even tell you to avoid running it at 4 ohm bridged if you could. The problem with speakers impedance is that it is very frequency dependent. The total impedance you calculated is just the nominal total impedance of your speakers, it only represents one frequency on the impedance curve of the speakers, on other parts of the curve it gets even lower then 2.67 ohms and enhances the problem of straining the amp even more.

This is an example of a typical impedance curve of an 8 ohm (nominal) speaker:
Posted Image
As you can see from the graph, it gets down to a minimum of 6 ohms.

I suggest you put two speakers on one channel and one speaker on the second channel. The power going to all speakers will be almost the same, 775W max for the single speaker and 600W max per speaker on the other channel. If you have a true RMS DVM you adjust the gain knobs so the amp outputs the same voltage for each speaker.
Avi

In Topic: xti back light is dim

11 July 2014 - 01:21 AM

Probably another symptom of that ribbon cable... Have you ever serviced this amp? Was the ribbon cable ever replaced?

In Topic: MA3600VZ bi-level switch issue

07 July 2014 - 02:28 PM

I know, it sounds very AA but thank you for sharing big A ☺