duffdog

Members
  • Content count

    8
  • Joined

  • Last visited

Community Reputation

0 Neutral

About duffdog

  1. XTi fan trip temperature

    Hello David. I have just duplicated your experiment in my shop with an xti4000 because it is very important that I get my amps to work correctly, my company is at risk of losing thousands per week if we can't please our customers. I purchased a commercial 2ohm non-reactive 1000watt dummy load and duplicated your experiment. I connected one channel to the 2 ohm load and used the DSP OFF preset in the amp with 1.1.1.4 firmware. At a -3db pink noise input, the amp thermalled at exactly 45 seconds into the experiment with the fan roaring at max speed, with only one channel being driven. The other channel was idle. The fan kicked in after only 17 seconds and very quickly ramped up to max speed, but it was obviously not enough as the thermal light came on at approx 30 seconds and remained on after the pink noise generator was stopped. Additionally, the xti4000 made a very odd hissing noise before the fan activated and continued hissing until I stopped the pink noise. I began to get a bit scared when the amp channel temp passed 77C and was still climbing fast... The amp did thermal at a 0db pink noise level in about 10 seconds and turn itself off-- I measured 26 volts across the dummy load at max power for all 10 seconds, does this coincide with the reading you got with your xti4000? If so, that is terrible because that means theres only 338 watts in stereo across my precision non-reactive 2 ohm load when the amp thermalled!!!! T Actually that is not the test I did. All I did was run the amp up hot enough to verify the fan turn on temperature as that is what this posting was pertaining to. During that time I did not see the amplifier react in the same way that you are seeing. Since you have two other postings and a PM concerning these same issue why don't we stick to this posting so as to keep all the information in location. I have passed your concerns up the ladder and have requested it be looked at by engineering. If there is any other information you need from me don't hesitate to ask, I am more than willing to do anything to get my amps working correctly. I have since tested 5 other xti4000s and confirmed that the hissing noise must be heterodyning from the PS and therefore normal. T
  2. amp shutting down

    heres a temporary fix because mine were doing the same thing, follow these directions and your problem will probably go away, unless you have a bad speaker. This was from one of the engineers on this board: However, here is how to check to verify if the amps fans are operational on the updated units. "Press and Hold in the Center (Prev./Up) button while applying power to the amp. After about 4-5 sec the words "Press Me" will appear in the display. Release the center button. This will put the amp into a diagnostic mode were all the front LEDs will light and the fan should go into full speed. To clear this mode either depress each of the three front panel buttons once (one at a time) or power down and back up. A couple of fan modification were made with the 1.1.4.1 firmware: *Added mode to increase fan speed sensitivity. If the “Next” button is held down at start up, a more sensitive fan routine will be used. The fan will turn on at 43C and off at 53C. This operation is persistent (non-volatile) so you only have to do it once. To disable it, hold down the “Next” button at start up and the flag will be toggled off. along with this another new screen to the self diagnostic menu. It displays which fan mode is currently selected. "Fan Hi" or "Fan Lo". Hi is the normal factory default mode, Lo is the new more sensitive alternate fan mode. The mode is selected by holding down the “Next/Down” button during power up. This will toggle between the two modes. In Hi mode, the fan will not turn on at idle; it will turn on at 53C. In LO mode, the fan will turn on at 43C. This mode is persistent and will not be changed by anything except the front panel button held down during power up. (To get to self diagnose mode hold in the front three buttons togather for about 4 seconds. Then use the Pre/Up and Next/Down buttons to navigate throught he display windows) *Added a new mode of operation. If the “Sel/Enter” front panel button is held down during power up, the fan will run at full speed at all times. The only way to exit this mode is to hold the “Sel/Enter” button during power up again, so it acts to toggle this mode on and off. " D.Glass/Crown Tech Support If the fan is on all the time, its highly unlikely that the amp will shut down like yours does. Just imagine me pulling my hair out when 8 of my xti4000 HF amps were randomly shutting off during a big show. T
  3. XTi fan trip temperature

    Hello David. I have just duplicated your experiment in my shop with an xti4000 because it is very important that I get my amps to work correctly, my company is at risk of losing thousands per week if we can't please our customers. I purchased a commercial 2ohm non-reactive 1000watt dummy load and duplicated your experiment. I connected one channel to the 2 ohm load and used the DSP OFF preset in the amp with 1.1.1.4 firmware. At a -3db pink noise input, the amp thermalled at exactly 45 seconds into the experiment with the fan roaring at max speed, with only one channel being driven. The other channel was idle. The fan kicked in after only 17 seconds and very quickly ramped up to max speed, but it was obviously not enough as the thermal light came on at approx 30 seconds and remained on after the pink noise generator was stopped. Additionally, the xti4000 made a very odd hissing noise before the fan activated and continued hissing until I stopped the pink noise. I began to get a bit scared when the amp channel temp passed 77C and was still climbing fast... The amp did thermal at a 0db pink noise level in about 10 seconds and turn itself off-- I measured 26 volts across the dummy load at max power for all 10 seconds, does this coincide with the reading you got with your xti4000? If so, that is terrible because that means theres only 338 watts in stereo across my precision non-reactive 2 ohm load when the amp thermalled!!!! T
  4. yes. The new firmware is installed and the amp shows 1.1.1.4 when in diagnostic mode. What is so different from the other firmware that causes very low power output? Is there somewhere I can read what specifically was done in each firmware update?
  5. I am having yet more problems with the 1.4 firmware. I just got back from an outdoor festival and it was very embarrasing to tell the promoter that the reason my subs aren't very loud was because "my new amps don't feel like playing music today" First problem (big problem): In bridged 4ohm mode, the amp does not output very much power at all-- verified with a scope that it was only sourcing 300watts max into a 4 ohm load. No overheating conditions exist and fan was programmed to maximum. When I put the amp into diagnostic mode, all the power returned and it sounded great. When I pressed the "sel" button to go back to normal mode, the amp reduced its output 10db and indicated clipping. This happens regardless of attenuator position-- increasing the gain nets no more output at all. Its as if the amp has invented a power ceiling for itself which is completely false. Next problem: Front panel indicators indicate "clipping" at -20db. Opening system architect confirms that the amp is "clipping" via the LED's but nowhere near maximum output. Other xti amps with other firmware in signal chain have no such problem. Next problem: Front panel screen indicates "short 1" in all speakers in all modes-- stereo, mono. Same speakers work flawlessly on other xti's with other firmware. Next problem: Metering led's indicate clipping all the time when there is obviously no clipping in either the output or input. Other xti amps in signal chain have no such problem.
  6. XTi fan trip temperature

    I will try it now. I just entered the diagnostic mode to verify that the fan is operational in those xti4000s. It seems that the fan works for the diag, but not when there is signal. For the record, the amp was so hot that I could not touch it and the fan was still not on. T Well............hot to the touch is a relative description. So I would say you would have to check the actual channel temperatures. This can be done by going ito the Special Diagnostic mode. -With the amp on. -Hold in the front three buttons togather for about 4 seconds. -Then use the Pre/Up and Next/Down buttons to navigate through the display windows to the CH 1 and CH2 temperature displays. -To clear out of this mode press the SEL button. Note: When in this display mode other metering will not be correct so don't leave the amp in this mode. It took me a half hour of driving pink noise into both channels of the amp to get it close to 53 degrees C (122 degrees F). I had to finally put the amp into hard clip to get the outputs to hit 53 degrees C and turn on the fan. Yes the amp was very warm to the touch. Im sorry, perhaps I am not explaining the problem correctly. When I say the amp "overheats" I mean that it shuts off the output and the ready lights go out. I could care less how hot the amp was if it was still playing music, but this is not the case. All 4 of the amps repeatedly mute after about 3 minutes of use, they then come back on for about 20 seconds and continue to keep muting themselves every minute-- during this time, the fans in those 4 particular amps never activated. I have updated the firmware in the amps just now and will try them again in a few minutes. T edit: I activated the full speed fan option for those 4 xti4000's and one xti2000. They are all running fine in 110 degree ambient temp right now. The air coming out of the rear of these amps is extremely hot, much more so than my older MA amps.
  7. XTi fan trip temperature

    I will try it now. I just entered the diagnostic mode to verify that the fan is operational in those xti4000s. It seems that the fan works for the diag, but not when there is signal. For the record, the amp was so hot that I could not touch it and the fan was still not on. T
  8. XTi fan trip temperature

    Not the answer I was hoping for. So you can't go back to old firmware with the higher temp? Thanks Im having a major issue with the newer 1.1.4 firmware for all my xti4000s. It seems that someone decided to eliminate the temp controlled fan coming on altogether and now all of the amps which I updated are overheating and the fan is not working. I checked with some of my other xti4000 amps and verified that only the newest firmware prevents the fan from coming on, thus tripping the overheat indicator. Additionally, the updated amps are giving bogus fault readings like "short 1" when there is no short and the speaker works fine with non updated xti4000s. It would be great if there were multiple firmware choices: light duty (fan on at high temp) heavy duty (fan on at low temp) and extreme duty (fan on constant). This could solve many problems--including mine T