Sonata III 500 also has a very unique feature, a washable air filter. This filter is located behind the frontal panel and can be accessed from below the case, as shown in Figure 9.

click to enlarge
Figure 9: Removing the air filter.

click to enlarge
Figure 10: Washable air filter.

As mentioned this case comes with a pre-installed Antec EarthWatts 500 power supply. You can see this power supply in Figure 11 and its label containing all its specs in Figure 12. This power supply features active PFC, has at least 80% efficiency and, what is more important, its nominal power was labeled at 50º C, so Antec guarantees that this power supply can truly deliver 500 W. Click here to read a full review on this power supply.

click to enlarge
Figure 11: Antec Earthwatts 500 power supply.

click to enlarge
Figure 12: Label from Antec Earthwatts 500 power supply.