Originally Posted by GregCh
Can someone who owns the Epson 10500 answer a question for me?
I live at 8000 feet of elevation. Does the Epson 10500 have a high altitude mode that is required to be switched on above 3000 feet? Also how does the fan noise sound compared to the fan on low and on high when in High Altitude mode?
It has always been a problem buying good projectors that don't sound like jet engines when in High Altitude mode. So far only Sony seems to make bulb projectors with acceptable noise in High Altitude mode.
I had assumed that laser projectors would be quieter, now having heard from Mike and others about laser fan noise, I am not so sure.
If you use the low or middle lamp altitude mode you will not have any problems.
In high lamp + altitude mode if it can be annoying.
On the other hand in high lamp moves so much air that I doubt that the altitude mode is necessary although it lives in a very high place.
I measured my unit with rew, calibrated microphone and one meter (40 '') away.
Minimum noise measurable in my room 46.9db.
Eco: 47.6 // Medium: 48,8 // High: 49,6 // High + altitude mode: 52,2
As it is difficult to measure a sound so close to the background noise, I repeated the measurement at 20cm (0.3 '').
Eco: 51,3db // Medium: 52,2 // High: 53,8 // High + altitude mode: 57,6db
These are minimum measurements recorded in 2 minute sessions per mode.
The maxims and the average should not be taken into account since we are not in an anechoic room and for that reason I only show the minimums.
Apply a positive correction of 1.5db to compensate the oscillation of the meter and will have measures more adjusted to the real world.