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Old 27th February 2013, 07:39 AM   #1661
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Agree on Nexus fans. I have them in my HTPC, and they are really silent. No need for fanless PC's with good silent fans.
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Old 27th February 2013, 09:39 AM   #1662
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Sure, just fit the biggest heatsink you can find, a pair of 12cm fans running at 20-30% their rated speed isolated from chassis with rubber gomets, isolate mechanicals hard drives from the case, and you won't hear it. Sorry for the OT.
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Old 27th February 2013, 09:50 AM   #1663
bcmbob is online now bcmbob  United States
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reg, not sure that's OT because those are the techniques that are necessary if one adopts liquid cooling for power amps. The physical isolation is key for use with audio. What are you using to regulate the fan speed?
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Old 27th February 2013, 10:20 AM   #1664
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Walter, nice build. What is the purpose of the caps which are mounted on the diyaudio f5 board. Is there are reason they are put there and where do you install them, (before the _+ - voltage in? Does this help the sound quality? I am wondering if I should put some on mine also. thanks, John
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Old 27th February 2013, 11:15 AM   #1665
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Quote:
Originally Posted by bcmbob View Post
reg, not sure that's OT because those are the techniques that are necessary if one adopts liquid cooling for power amps. The physical isolation is key for use with audio. What are you using to regulate the fan speed?
One of these controllers, they are just potentiometers acting as a voltage divider (no active devices involved) AFAIR. I got it for something like 10€ and fits in a 3.5" bay. Nice blue leds and overall finish. I currently have it disassembled due to a new computer I am building, so would you like me to draw down the schematic, resistor values and so?

http://i01.i.aliimg.com/wsphoto/v0/6...Controller.jpg

It is VERY important to fit the fans with those grommets, so vibrations will not be transferred to the enclosure. Even at 100% full speed, if properly isolated, a Nexus fan will be pretty much silent inside a case.

http://reviewstash.com/files/NF-P14FLX/fanmount.jpg
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Old 2nd March 2013, 09:04 AM   #1666
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Hi together,

finished my Pass Aleph mini .... little 14 kg weight!

Click the image to open in full size.Click the image to open in full size.

Click the image to open in full size.Click the image to open in full size.


Regards ............Carsten
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Old 2nd March 2013, 10:22 AM   #1667
WalterW is offline WalterW  Netherlands
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Hi John,

I got a hint from an other DIY that putting a little 'audio grade' capacitor will give it a better sound, details in the highs and so... because my large Panasonic capacitorbank is computergrade...
I don't know if it really matters, I can't hear the difference.
But it is common here, to put a large polypropyleen capacitor ( 4u7 - 10 uF) over a big capacitorbank.
You can put some on the F5 board, but you've got to improvise with big wires underneath the board.

Walter


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Originally Posted by JohnGeneva View Post
Walter, nice build. What is the purpose of the caps which are mounted on the diyaudio f5 board. Is there are reason they are put there and where do you install them, (before the _+ - voltage in? Does this help the sound quality? I am wondering if I should put some on mine also. thanks, John
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Old 2nd March 2013, 10:25 AM   #1668
WalterW is offline WalterW  Netherlands
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Wow, looking great Carsten! Mini ?.....
Are the toppanels from Frontpanelexpress?
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Old 2nd March 2013, 10:41 AM   #1669
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@WalterW,

Thanks! ...."J"
No, they are from Schaeffer AG in Berlin.
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Old 2nd March 2013, 10:56 AM   #1670
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mini
You sure that's Left and Right ?
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