Writing this in once concise post to make it stand on its own. Question towards the end for those who feel inclined.
Got two FP14k's, one home theater version which has temperature controlled fans that turns on and off and one that doesn't. Long story short the home theater version popped a short while after I had bought it and two boards were broken (one which might have been my own fault after messing up a measurement). I did not buy this amplifier from Sanway directly, but from someone who bought it from them a month or so earlier.
After great assistance from Mr Johnson we agreed that two new amplifier boards would be the best solution, and a few days later I received the boards and installed them.
I suspected that there could have been something malfunctioning with the fan thermostat control so I got instructions on how to disable it as the amp is outside of the room and noise is not a problem.
Today I finished it up and turned it on and it plays bass. Yay!!
After running both amplifiers with equal loads (4xLMSU, one on each channel of the two amps), equal settings, input signal and air flow access for 5 minutes under very mild
use I did a temperature IR reading at the exhaust: The fixed amplifier reads 26 degrees Celsius while the other one read 19 degrees Celsius (77/66.2 F) at the same location
1) I can't see why they have such a big variance in temperature when they have the exact same working conditions and are now wondering if this is normal?
2) Also is it safe to pop the top lid off and turn the amplifier on to make sure all fans are moving without any load and just for 10-15 seconds?
3) What kind of temperatures do you guys have at the exhaust? (left side)
I've also written Sanway asking if the home theater version has slower fans than the continually running one because there seems to be a difference in pitch from the noise coming from them. Also the air flow coming out of the fixed amp seems a little weaker.