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Post by drumace on Dec 5, 2018 16:01:59 GMT -5
Hi,
Today after few minutes of using the XPA-1L gen 2 in class A, the amp turned into protection mode and was very hot.
I turned it off using the switch and waited for it to cool. Then switched to class AB. After few minutes the amp switched into protection mode again and was hot again even in class AB.
Please advise.
Thanks in advance.
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Post by davidl81 on Dec 5, 2018 16:16:44 GMT -5
Hi, Today after few minutes of using the XPA-1L gen 2 in class A, the amp turned into protection mode and was very hot. I turned it off using the switch and waited for it to cool. Then switched to class AB. After few minutes the amp switched into protection mode again and was hot again even in class AB. Please advise. Thanks in advance. Have you recently changed speakers or adjusted speaker wires by any chance? I know its a simple thing, but a good place to start. |
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Post by drumace on Dec 5, 2018 16:24:34 GMT -5
Hi, Today after few minutes of using the XPA-1L gen 2 in class A, the amp turned into protection mode and was very hot. I turned it off using the switch and waited for it to cool. Then switched to class AB. After few minutes the amp switched into protection mode again and was hot again even in class AB. Please advise. Thanks in advance. Have you recently changed speakers or adjusted speaker wires by any chance? I know its a simple thing, but a good place to start. Hi, No I didn’t replace speakers or wires. |
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Post by Casey Leedom on Dec 5, 2018 16:31:22 GMT -5
Or, someone could have been bumping around behind your Amplifier. You might want to check to see if a strand of your Speaker Wire came off of one terminal and is touching the other. The only other thing I can think of is an internal short of some kind ...
Casey
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Post by DavidR on Dec 5, 2018 16:40:51 GMT -5
what Casey said
Check all connections
Call Emo Techs if issue remains unresolved
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Post by 405x5 on Dec 5, 2018 16:46:32 GMT -5
Hi, Today after few minutes of using the XPA-1L gen 2 in class A, the amp turned into protection mode and was very hot. I turned it off using the switch and waited for it to cool. Then switched to class AB. After few minutes the amp switched into protection mode again and was hot again even in class AB. Please advise. Thanks in advance. That’s bad....time to get on the phone ☎️ with Emotiva |
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Post by novisnick on Dec 5, 2018 23:55:55 GMT -5
Yep, call Emotiva!  |
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Post by highfihoney2 on Dec 6, 2018 14:32:32 GMT -5
How is the amp racked , Class A and Class A/B amps should never be set up inside enclosed areas like under shelves or inside entertainment center ,not without serious cooling via passive air intake and active exhaust that's forced to draw cool air over the amp ,my Krell Class A amps absolutely hate being racked & have been sitting on amp stands for a decade because of over heating when racked .
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Post by drumace on Dec 6, 2018 14:35:57 GMT -5
How is the amp racked , Class A and Class A/B amps should never be set up inside enclosed areas like under shelves or inside entertainment center ,not without serious cooling via passive air intake and active exhaust that's forced to draw cool air over the amp ,my Krell Class A amps absolutely hate being racked & have been sitting on amp stands for a decade because of over heating when racked . The amp sits on a tv bench. Nothing above it. I also use a low noise 140mm fan on the amp top to avoid heat build up. |
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Post by highfihoney2 on Dec 6, 2018 14:45:27 GMT -5
How is the amp racked , Class A and Class A/B amps should never be set up inside enclosed areas like under shelves or inside entertainment center ,not without serious cooling via passive air intake and active exhaust that's forced to draw cool air over the amp ,my Krell Class A amps absolutely hate being racked & have been sitting on amp stands for a decade because of over heating when racked . The amp sits on a tv bench. Nothing above it. I also use a low noise 140mm fan on the amp top to avoid heat build up. Ok that sounds right ,aside from issues with wiring the only other issue that's made any of my Class A amps over heat was issues with speaker impendance ,I had some 4 ohm McIntosh speakers that had a strange impendeance curve that dipped down to below 3 ohms & we're a nightmare on my Golden Tube Class A amps ,are you running 4 ohm nominal impendeance speakers and if so can you find the specs so we can see if there's some load being presented that the amplifiers don't like ? |
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Post by Gary Cook on Dec 6, 2018 14:50:25 GMT -5
Standard fault finding process one component at a time. Disconnect the amp from everything except the power cable and turn it on. Wait, if it goes into protection mode then it’s the amp. If it doesn’t, then connect just the input and turn it on. Wait, if if goes into protection mode then it could be the interconnect cable, swap it out and test again. Next, disconnect the input and reconnect the speaker cable with no speaker connected at the other end (make sure the two loose ends aren’t touching each other). Wait, if it goes into protection mode then swap out the speaker cable and test again. If it doesn’t, then reconnect the speaker (leave the interconnect cable unplugged). Wait, if it goes into protection mode then it’s the speaker. To confirm swap speakers, if it works OK with the other speaker then it’s definitely the speaker.
Takes time, but the easiest way to isolate the problem bit.
Cheers
Gary
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Post by drumace on Dec 6, 2018 14:51:00 GMT -5
The amp sits on a tv bench. Nothing above it. I also use a low noise 140mm fan on the amp top to avoid heat build up. Ok that sounds right ,aside from issues with wiring the only other issue that's made any of my Class A amps over heat was issues with speaker impendance ,I had some 4 ohm McIntosh speakers that had a strange impendeance curve that dipped down to below 3 ohms & we're a nightmare on my Golden Tube Class A amps ,are you running 4 ohm nominal impendeance speakers and if so can you find the specs so we can see if there's some load being presented that the amplifiers don't like ? My speakers are GoldenEar Triton One. I’ve been using them for a year with these amps with no issues. |
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Post by highfihoney2 on Dec 6, 2018 15:08:33 GMT -5
Ok that sounds right ,aside from issues with wiring the only other issue that's made any of my Class A amps over heat was issues with speaker impendance ,I had some 4 ohm McIntosh speakers that had a strange impendeance curve that dipped down to below 3 ohms & we're a nightmare on my Golden Tube Class A amps ,are you running 4 ohm nominal impendeance speakers and if so can you find the specs so we can see if there's some load being presented that the amplifiers don't like ? My speakers are GoldenEar Triton One. I’ve been using them for a year with these amps with no issues. Hmm,I did not know that ,all I can say at this point is to follow the advice above & try to eleminate your other gear & wiring . |
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Post by drumace on Dec 11, 2018 7:30:04 GMT -5
Hi guys,
Some updates to share-
I took the last weekend to do some tests on the amp.
I disconnected everything except the power cable and let the amp run in A/B mode. Worked fine for couple of hours.
Then, I connected the XLR input to the amp, leaving it to run some more time. Still worked fine.
Finally, I connected the speaker cables. The amp worked fine for the whole weekend.
Yesterday, I wanted to test the amp again, but this time in class A mode (which originally was the operating mode when the issue first occurred). So I switched to class A on the front panel and turn the amp on (no audio signal playing). It took only few seconds for the amp to trigger the safety mode and turn off automatically.
Then, I switched the amp off on the back, switched back to class A/B and turn the amp on. No issues occurred and the amp worked fine for couple of hours.
What does this mean?
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Post by adaboy on Dec 11, 2018 9:20:21 GMT -5
Hi guys, Some updates to share- I took the last weekend to do some tests on the amp. I disconnected everything except the power cable and let the amp run in A/B mode. Worked fine for couple of hours. Then, I connected the XLR input to the amp, leaving it to run some more time. Still worked fine. Finally, I connected the speaker cables. The amp worked fine for the whole weekend. Yesterday, I wanted to test the amp again, but this time in class A mode (which originally was the operating mode when the issue first occurred). So I switched to class A on the front panel and turn the amp on (no audio signal playing). It took only few seconds for the amp to trigger the safety mode and turn off automatically. Then, I switched the amp off on the back, switched back to class A/B and turn the amp on. No issues occurred and the amp worked fine for couple of hours. What does this mean? Means that you need to follow the exact process you used to test a/b. Try running it in class a without any xlr connection. If it shutdown contact emotiva. |
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Post by Casey Leedom on Dec 11, 2018 12:16:34 GMT -5
Sounds like some part of the Class A path in the Amplifier has an internal short. But go ahead and do the entire set of testing again in Class A.
Casey
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