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Post by JKCashin on Apr 11, 2016 19:09:10 GMT -5
I updated my response to be clearer. I trying to draw attention to the fact that the protection circuitry takes you from class A to A/B in an overheat situation, not that class A makes the amps run hotter.
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Post by novisnick on Apr 11, 2016 19:14:32 GMT -5
I updated my response to be clearer. I trying to draw attention to the fact that the protection circuitry takes you from class A to A/B in an overheat situation, not that class A makes the amps run hotter. AH!  I didn't know that. Nor do I believe that I've ever heard the difference if/when it went from Class A to A/B. Nice tool to build into the circuitry though! |
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Post by JKCashin on Apr 11, 2016 19:24:22 GMT -5
I updated my response to be clearer. I trying to draw attention to the fact that the protection circuitry takes you from class A to A/B in an overheat situation, not that class A makes the amps run hotter. AH! I didn't know that. Nor do I believe that I've ever heard the difference if/when it went from Class A to A/B. Nice tool to build into the circuitry though! Indeed, it is! As for not hearing when it goes from class A to A/B, well, if you think about it for a second, it's not putting out a steady wattage, say 29 watts, and then you turn it up a bit, and it's 31, and has crossed over. Instead, because you're playing music, it may be varying from 5-29W at one volume level, and then when you turn it up, it's varying from 7-31W... so when a drum kick happens, or a bass twang, well, you cross over the 30W threshold, and that short burst of sound happens in A/B, not A. So even if you were trying to hear the difference, the cross-over into A/B, it would require material that was more static in output level than music is. |
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rontj
Minor Hero
Posts: 95 
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Post by rontj on Apr 17, 2016 22:58:26 GMT -5
I have a pair of XPA-1Ls, and while the amps themselves did not go into protection mode, or anything else unwanted, I do believe their heat, stacked in a 72" rack in my coat closet (modified for an A/V rack, i..e, no coats), failed my older PS Audio Quintessence power conditioner (melted some waxy substance in the conditioner), as well as caused, or helped cause, my Gen 1 PS3 60GB to go into the "Yellow Light of Death", which is a heat-caused issue.
My solution was to move the two XPA-1Ls to the top of the rack, and put a 150 CFM fan in my attic, with 4" tubing directly (as in 2") above the top XPA-1L. Even in Class A, it registered 101 degrees last night, where before, when I had it lower in the rack, thus less ventilation, and maybe a 25 CFM exhaust, it was registering 130 degrees. The lower amp registered 115 degrees in Class A. Much much better. And, there's nothing above them to be cooked.
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joto
Minor Hero
Posts: 22
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Post by joto on Aug 4, 2016 15:16:14 GMT -5
Purchased a pair of 1L about two and a half years ago the first one went into the protective mode and was returned four times when same problem happened for a fifth time they finally replaced it about 6 months ago thus far replacement fine(fingers crossed on this).
Now the second unit has been returned as sound briefly turns off after a cold start this time unit stays in the blue mode.
Hoping this is not a faulty line of amps.
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Post by tweed on Aug 4, 2016 17:30:04 GMT -5
I have enjoyed 2 of them since they came out a few years ago. Have run them with Tekton Lore-S and not Revel 106's. Never an issue.
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Post by adamhart on Aug 5, 2016 21:45:20 GMT -5
I had 3 xpa-1l's and am having the exact same issues. Luckily (.....maybe) I spoke with support and determined a fuse had blown before I sent it back and avoided having to pay the $25 or however much it costs to get it repaired. My question is the amps are still periodically blowing fuses, I'd say 7 or so over the past 18 months. Has anybody had an electrician come out and install 20A dedicated circuits to run these? That was basically my next step bc I can't figure out why they keep blowing fuses and assumed based on my setup I'm not providing enough juice and they short or something. I had an XPA-5 gen 1 connected and used daily for about 5 years and never a single issue and recently traded in one of the XPA-1l's for an XPA-3 gen 3 and the gen 3 has run perfectly for the past 4 months but while the gen 3 is running the 1L's are still blowing fuses. Are you guys able to run multiple 1L's on the standard electrical jacks without upgrading them or installing dedicated lines? Thanks for any input or suggestions.
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Post by adamhart on Aug 5, 2016 22:05:35 GMT -5
The amps are out and have adequate air so it shouldn't be heat Attachments:
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Post by novisnick on Aug 5, 2016 22:10:00 GMT -5
Ive had 4 of these amps, still have two of them. Never a problem, I have always had them connected to a CMX-2. I dont know if that matters but there it is.
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Post by Chuck Elliot on Aug 5, 2016 22:20:59 GMT -5
My 1Ls have run for 3 years without a problem. IMO they do require cooling. Here is my solution: Link |
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Post by adamhart on Aug 5, 2016 22:32:46 GMT -5
Thanks for the tip chuck I've been looking into buying some fans designed to be used for a/v gear but in my case like you can see in the pic I posted the amps are on the top shelf of my entertainment console and never get to hot or lack air flow. Actually the XPA-3 I have sits inside the the cabinet and hasn't had any issues and always runs cool.
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Post by Chuck Elliot on Aug 6, 2016 6:57:48 GMT -5
With that exposure I wouldn't expect you'd have any cooling issues.
My situation is different. I have a small vertical rack and the 1Ls are stacked. Mandatory for me!
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Post by adaboy on Aug 6, 2016 8:36:45 GMT -5
The amps are out and have adequate air so it shouldn't be heat There is NO reason your amps should be overheating with them out like that. Has to be something else my friend. |
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Post by adamhart on Aug 6, 2016 10:23:23 GMT -5
I agree that's was I was curious if anybody is running the amps on the standard power configuration of if they needed to install dedicated 20A circuits to run them properly without issue
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Post by novisnick on Aug 6, 2016 10:28:47 GMT -5
I agree that's was I was curious if anybody is running the amps on the standard power configuration of if they needed to install dedicated 20A circuits to run them properly without issue Mine have always run on a standard wall plug receptacle. |
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Post by audiosyndrome on Aug 6, 2016 10:36:52 GMT -5
As I've stated before, I run five XPA-1L Gen II amps, one for each channel, without ever having a problem of any sort. And the L and R channels run 10-12 hours per day except when we go on vacation. The system runs on two 20A dedicated lines but 15A lines should be more than sufficient (it did not cost anymore for the 20A lines over 15A lines so running 20A was the obvious way to go).
Russ
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Post by audiosyndrome on Aug 6, 2016 10:40:58 GMT -5
But I like Chuck's link above. I have plenty of ventilation in my horizontal rack but only run in class AB. I'd like to run (sometimes) in class A so I'm going Chuck's route for that. I purchased the fans several months ago but too busy to install yet (don't know how I got anything done before retirement). Russ |
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Post by adaboy on Aug 6, 2016 14:13:52 GMT -5
As I've stated before, I run five XPA-1L Gen II amps, one for each channel, without ever having a problem of any sort. And the L and R channels run 10-12 hours per day except when we go on vacation. The system runs on two 20A dedicated lines but 15A lines should be more than sufficient (it did not cost anymore for the 20A lines over 15A lines so running 20A was the obvious way to go). Russ So can someone please explain to me how using a dedicated 20A line is supposed to make an amp run cooler than say one on a 15A line? |
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Post by adamhart on Aug 6, 2016 14:53:28 GMT -5
adaboy, I don't think anybody was saying that having a 20A line would make these amps run cooler. I was curious if anybody was running multiple xpa-1l amps on standard outlets and circuits that come with a standard house or if they had to install a dedicated 20A circuit. I thought I might be having power issues bc i have the two rather large subs and was running 2 XPA-1L's, XPA-3, pre/pro, apple tv, blu-ray player etc. and i keep blowing fuses in the XPA-1L's. Somebody commented that it might be heat and thats when I uploaded the pic showing my xpa-1l's are on the top shelve and not inside a cabinet and said it def isn't heat for my situation. So unless I missed something I don't think anybody is saying that installing a 20A circuit will prevent overheating
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Post by teaman on Aug 6, 2016 15:23:34 GMT -5
Adamhart, did you purchase the XPA-1L's new, refurbished, factory refreshed or from their Ebay store jadedesign?
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I didn't know that. Nor do I believe that I've ever heard the difference if/when it went from Class A to A/B. Nice tool to build into the circuitry though! 
