This makes it run hotter. Plug in a headphone that actually needs power, crank up the volume, and it should run significantly cooler.
Aune S17 pro
- Thread starter music_man
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- aune aune s17 pro
Ummmmm…. with volume 27-29, XLR input from the DAC, using Sony MV1 or HD660s2 headphones. i got same results. this is the reason for running another test without any input/output. regardless of any settings, temperature is ramping up rapidly until 69c.
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labeelen
100+ Head-Fier
Open a dispute at AliExpress because the seller sold you a defective product.Having a exac same issue.
My room temp is 20C, my unit is rised up on the spike, During the testing, it was powered on without headphone, without any audio input, with zero volume.
Tempurature reached out maximum 69C degree at 100ma mode VERY quickly, then switched to 50ma mode.
I feel S17 (general class A amp) makes good sounds when it is warmed up abourd 50C degree.
The temp changing speed from 50C to 69C, only takes 15 mins, ramps up fast.
Basically, I only can listen the music for 15 mins at 100ma mode, 50ma mode stays at 62C.
Definitely this is not normal, therefore I reached out the seller to return or get replacement, A seller refused my return request, and said unit is VERY normal.
If anyone consider to order any audio equipment from AliExpress, "All buyers worldwide, beware of the seller below. Despite clear heating issues and provided test results with pictures and videos, this seller has refused return & refund."
AliExpress seller: AKHiFi Audio Store
Both are pretty high sensitivity headphones that don't require much power but yeah if you don't even see a small decrease then IDK
It's not that uncommon for this product: my unit has exactly the same behaviour, altough I am able to run it in 100 ma for about 1 hour. The only thing I noticed that as a major effect on the unit temperature is room temperature: I lowered the room temperature by 10 C (28C to 18 C) and was able to run it for two hours and it only reached 65 C (the room was too cold for me, unfortunately).
labeelen
100+ Head-Fier
MigueIP, an S17 overheating without anything connected at a room temperature of 20 degrees is not normal. When my S17 is powered on at 18 degrees room temperature it wil max out at 55 with no extra ventilation whatsoever.
T
Maybe we should do a poll to see how many units overheat and how many don't, indicating the room temperature they operate. In my experience everything else apart from current has no effect (balanced/single ended, low or high gain, volume, et).
labeelen
100+ Head-Fier
As far as I know there are some unfortunate combinations with specific (low impedance) headphones that have higher temperatures but also those S17 units should not overheat when there is no (or another higher impedance) headphone connected.
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In this review the guy says he saw it reaching 70 C. I am guessing that his room is a lot colder than mine, so they even sent a review unit with the same behaviour. One thing I do know: this was the first and last item I've bought from Aune.
This is a class A amp. Yours doesn't reaches the same temperature (whatever that is) with no cables connected? Maybe you have a defective unit then.
I would say that any Aune S17 that does NOT overheat to 69C on 100ma is abnormal.
Class A amps reaching over 65C is not anything unusual, though it may hurt the lifespan of the components. Problem here is that the amp won't let you use 100ma to prevent it from overheating which might have been one of the selling points of the amp.
Yes. That's what I've said before. Maybe they are operating with only one transistor per channel and can't produce 100ma. Maybe the owners who think that have a perfectly working unit have a defective one.
The most reasonable explanation for me is that the product has a poor design (heat dissipation not compatible with the 100ma mode). Apart from that there some (many) defective units that are not able to produce 100ma (even if so is stated in the display) so their owners are happy with their product because ignorance is a bliss. Of course Aune should come and explain the different behaviour between units, but only thing that they do is emit some vague comments.
leoxdebois
New Head-Fier
Heat sinker + lift the amp with higher feet should solve the problem for most people suffering of hot room temperatures. But if the unit reaches the limit without normal temperature, yes you have a deffective unit. Mine has never reached the point.
Passive heat sinker
Passive heat sinker
tommo21
100+ Head-Fier
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How many defective units are there, and how many has been sold? @MiguelP
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labeelen
100+ Head-Fier
In post #933 Aune is very clear with the below statement:
“Hi, if there's a problem of your device, we recommend you to contact your seller to test it. If it's malfunctioning, you may need a repair or replacement.”
Nothing ‘vague’ in that statement, to me.
