![Image](http://www.curmudgeon.pwp.blueyonder.co.uk/mods/case_ducts.jpg)
The duct material is standard 100mm from B&Q
![Smile :)](./images/smilies/icon_smile.gif)
The most poorly built heatsink baffle in the world:
![Image](http://www.curmudgeon.pwp.blueyonder.co.uk/mods/heatsink_baffle.jpg)
First of all I tried using a 120mm fan mounted in its normal position at the back of the sonata to pull air off the CPU, but this was still too noisy, so I mounted an 80mm panaflo on top of the baffle:
![Image](http://www.curmudgeon.pwp.blueyonder.co.uk/mods/panaflo.jpg)
The sonata PSU has annoyed me since I bought the case. It doesn't get hot at all, yet the fan is always humming away noticeably. I opened up the PSU and removed the fan, and took the temp. controlled fan output out of the back of the PSU, and attached it to the 120mm vantec stealth in front of the hard drives.
Since I installed the pre-cut acoustipack, cool air from the front now flows over the hard drives, up the rectangular ducting and over the PSU, which means - no fans at the back:
![Image](http://www.curmudgeon.pwp.blueyonder.co.uk/mods/case_rear.jpg)
With the panaflo turned down to ~5V the only noise coming from the case is due to turbulence, which is why I'm thinking of installing some smooth sound absorbing material on the inside of the ducting, to reduce the turbulence and absorb any HF-noise coming from the panaflo.
Temperatures are (CPU, case) ~45C, 27C idle , ~51C, 31C after 30 mins CPUburn-in. Hard disks are always around 30C.
I could probably get CPU temp. down by about 5C by using a decent heatsink (currently a Tt Volcano 9).
It'll have to do until I can get my hands on a Zalman reserator.....