Aune S17 pro

[Hooster]

Hi all, I am thinking of jumping to S17 Pro train, did anyone try to send 5v signal from DAC to amp using XLR? Does it clip or works perfectly fine?

Perfectly fine.

 

[Gymboy]

Thanks @Hooster , thats great.

 

[mudnut]

It's an exceptionally hot day today (and no AC, it's waiting on repair) and the S17 pro got to 69 degrees in 100ma after about an hour - under active cooling with a laptop cooling pad with two fans. It reverted to 50ma and temperature slowly dropped and then seemed to stabilize at 66 degrees. Not sure if it'd climb any higher since I had to do some stuff and had to turn off the amp. Just curious, what happens if it does keep climbing? Will the amp reach 69+ degrees in 50ma mode? At which point, will the amp stop running? Automatically shuts itself off???

 

[Vap221]

It's an exceptionally hot day today (and no AC, it's waiting on repair) and the S17 pro got to 69 degrees in 100ma after about an hour - under active cooling with a laptop cooling pad with two fans. It reverted to 50ma and temperature slowly dropped and then seemed to stabilize at 66 degrees. Not sure if it'd climb any higher since I had to do some stuff and had to turn off the amp. Just curious, what happens if it does keep climbing? Will the amp reach 69+ degrees in 50ma mode? At which point, will the amp stop running? Automatically shuts itself off???

Greetings.
Change the cable %-) Do not use high gain and 100mA current. I realized that ALL S17p amplifiers have problems with self-excitation. I'm not sure that it will work for a long time if it "whistles" at frequencies around 14 MHz. What will Aune say to this?

 

[SmartCheetah]

Just curious, what happens if it does keep climbing?

If the temperature dropped below 69 degrees in 50mA mode, it's unlikely to rise again.

Besides the 100mA -> 50mA autoswitch, I don't think there's any other thermal protection. The temperature shouldn't rise in the 50mA mode unless a unit is faulty.

 

[MiguelP]

If the temperature dropped below 69 degrees in 50mA mode, it's unlikely to rise again.

Besides the 100mA -> 50mA autoswitch, I don't think there's any other thermal protection. The temperature shouldn't rise in the 50mA mode unless a unit is faulty.

The temperature rises in both modes, like any other amplifier would (especially class A amps). Maybe you were trying to say it shouldn't rise after switching back to 50 ma after reaching 69 °C. Anyhow I think that every unit could reach 69 °C with the right room temperature.

 

[Lindholdt]

Greetings.
Change the cable %-) Do not use high gain and 100mA current. I realized that ALL S17p amplifiers have problems with self-excitation. I'm not sure that it will work for a long time if it "whistles" at frequencies around 14 MHz. What will Aune say to this?

Didn't Aune already answer you a few pages back?
I've never seen my S17 higher than 67c in 100mA mode. And that day my room was around 27-28c because of summer.
No matter which one of my cables I use.

 

[mudnut]

Didn't Aune already answer you a few pages back?
I've never seen my S17 higher than 67c in 100mA mode. And that day my room was around 27-28c because of summer.
No matter which one of my cables I use.

It seems to vary depending on headphone impedance. Under the same ambient conditions, using 100ma/high gain, my ZMF Auteur will hold at 57-59 degrees while my HE6se V2 will eventually hit 69 degrees and revert to 50ma. I wish Aune had implemented a more robust cooling solution even if they had to set a higher price and/or use a bigger enclosure for the case. Here's hope to a cool S17 Pro MK2!

 

[Vap221]

Didn't Aune already answer you a few pages back?
I've never seen my S17 higher than 67c in 100mA mode. And that day my room was around 27-28c because of summer.
No matter which one of my cables I use.

Aune was answered with a standard unsubscribe. The impedance of the headphones should not affect the heating. They did not answer why there is a reaction to the cable, they did not answer why there is a difference between 4.4 and XLR. I understand that I don't want to believe in problems. There is probably some number of fully functional amplifiers.

 

[SmartCheetah]

they did not answer why there is a difference between 4.4 and XLR

This difference - did XLR measure worse?

 

[Vap221]

This difference - did XLR measure worse?

Yes. there is interference at the XLR output, from the power supply network, as well as at the 6.3mm output.

https://www.head-fi.org/threads/aune-s17-pro.970060/post-18162134

 

[Erick Muller]

Well now that temps in my region of the world are going well up above 40 degrees, even at night with my minisplit on, I need to turn on the usb fans to cool down the S17, so this is defenitively not an amplifier for the "tropical" zones of the world, so buyer beware.

 

[jonathan c]

Well now that temps in my region of the world are going well up above 40 degrees, even at night with my minisplit on, I need to turn on the usb fans to cool down the S17, so this is defenitively not an amplifier for the "tropical" zones of the world, so buyer beware.

.... the rest of the planet may be joining you ....

 

[SmartCheetah]

You are right (in regards to cables from Aliexpress, like Openheart). I previously reported no heat issues in 100mA, but that was in low gain. In high gain the temperature rose to 66 degrees and stabilized. It was highest I've seen so far. That was on the Arya Stealth using a balanced 4.4, 16-core, this one. When I switched to the NDH-30 with the original cable, the temperature dropped to 62 degrees relatively quickly and stayed there. Switching to low gain made no further difference.

I additionally tested and compared the Openheart cable using my Arya Stealth in high gain, 100mA - at a room temp of 21-23 degrees.

Openheart (8-core, 4.4) - up to 63 degrees in low gain, no changes in high gain.
This cable (16-core 4.4) - up to 63 degrees in low gain, up to 67 degrees in high gain.
Original cables from my other headphones, like the NDH-30, Pandora Hope VI and MSR7b result in 1-2 degrees less in low gain, and no difference in high gain - both 6.3 and 4.4.

So in conclusion, it's either 16-core build or a different construction, or both, that cause higher temps with the second cable. (Un)fortunately, it sounds audibly better and pair well with my Aryas due to a little thicker, impactful and more energetic sound, so I will stick to it. I keep a quiet USB fan somewhere in case it reaches 69 degrees during hotter days. I have to admit though it takes several hours to reach the max temperatures listed.

But yeah, the S17 Pro is sensitive to cables, especially in high gain.

 

[pradiptacr7]

Synergising both. The lower end warmth with S17 Pro is quite amazing for AR5000