Just had to get a fan controller, I don't listen flat out loud all the time, so having variable fan speed comes in handy.
Purchased a Thermaltake Commander F6 RGB 6 channel fan controller. The ONLY one with analog dial adjustments, all the rest were touch screen, screw that. Much easier to use a dial or pot than a touch screen, finer adjustments also possible. Also had to purchase a cheap PC power supply as the fan controller requires both 5 and 12 volt input to run properly. This unit is designed to go into a computer case, but its for the amp so it is living next to the pre amp. The screen has 16 colors, 3 brightness settings, lcd back light on/off etc. Temp alarm, fan speed alarm and a few more features that I may or may not use.
I took pics of a few colors it does:
The controller also monitors, fan voltage, speed, and comes with 6 thermal probes to monitor temperature, you can put them anywhere you wish. I had to extend a couple of the probe cables so they would reach the back of the WOPL heatsink/transformer.
Reading 1: Room temp
Reading 2: Pre-Amp temp
Reading 3: WOPL Heatsink temp 1
Reading 4: WOPL Heatsink temp 2
Reading 5: WOPL Heatsink temp 3
Reading 6: WOPL Transformer temp
I dialed the fans down to about 700-800 rpm and cranked the WOPL as loud as my speaks would take. After a bit the heatsink temperature was heading towards 50 celcius, so I cranked the fans up to max speed which lowered the temp into the low to mid 40's. This is going to be even more handy when I obtain speakers that will require more power, therefore more heat to be managed. I'm not sure what temp is critical, will try and keep it below 50 if possible. This is still quite a safe temp in my opinion.
Fan 3 has a faulty speed sensor, it going to be returned for replacement, can't stand seeing those 0's. At $25 it should work properly.