XTi bizarre malfunction

john lutz

john lutz

Freshman
Jan 17, 2011
101
0
16
near Grand Rapids michigan
Anyone else seen this? Problem came up while trying to control a P.A. and monitors live from a laptop. If you mute XTi amp channels with System Architect - with speakers connected - and a muted speaker is excited by other audio - such as the PA still playing - the amp seems to think the back EMF coming from the muted speaker is a short and displays that fault message. The amp then un-mutes the channels and System Architect does not even register any changes were made. ???
 
Re: XTi bizarre malfunction

Yeah, this is an odd thing but easy to duplicate. Take an XTi, hook up a speaker to each channel, run wye input, give it some signal, mute one speaker in System Architect, let the playing speaker excite the muted one (adjust distance/volume of speakers) and watch what happens on the amp display. I messed with multiple different XTi amps old and new, speakers, cords, etc., to finally arrive at what I believe is occuring.

I was curious if anyone out there had seen this or possibly had random short fault messages that they could not track down. Nothing from Crown yet, hopefully just a firmware change will fix it. I too had problems (ribbon cable - display boards) with the early models but thought by now issues were sorted out. Unfortunately I stumbled on this problem with brand new units.
 
Re: XTi bizarre malfunction

XTI amplifiers display "short" whenever you ask them to output any power at all. Used to happen to all 12 of my xti4k's when I ran them bridged 4ohms mono. I sold them as soon as I could. Hint: If you are able to get firmware 1.01 somehow and load it to the amps, the amps will output their full power and don't display any error messages. Every firmware upgrade crown released post 1.01 simply lowered the output power, presumably to reduce warranty claims. Additionally, false error messages seem to pop up more often.
 
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