The Epson VS335 is a fairly bright business projector. It has a rated light output of 2700 lumens and my measurements show that the peak light output (measured near the center of the projected image) exceeded the Epson specification in the brightest mode. Below are the measured peak lumens values for the various color modes and when using the projector’s out-of-the-box settings.
Color Mode Lumens of Light Output
The factory default settings for brightness and contrast were nearly correct. However there was a slight amount of “Black Crush” visible which was easily corrected by increasing the setting for the brightness to +2.
The above lumens values were measured with the projector operating in normal lamp mode. Changing the projector to “Eco” mode reduced the light output to approximate 2/3 the brightness of normal mode.
I measured the brightness uniformity with the projector sitting level on a table. The vertical and horizontal keystone adjustments were set to zero, meaning no electronic keystone correction was being used. The brightest point was near the center of the image and the greatest light fall-off was measured at the top left corner of the image where it was nearly 30% lower than at the brightest point. There was less drop-off in brightness at the other three corners, which did not exceed a 25% drop in brightness. While the degree of light fall-off measured at the at the top-left corner could be visually observed when projecting a full white test image, it was not very obvious when viewing presentations, photos or video material.
The Epson VS335W is specified to produce a noise level of 37 dB in normal lamp mode and 29 dB in Eco mode. These values, especially in normal operating mode, are toward the upper end of what is typical for this class of projector. While the noise level, especially with the lamp operating in normal mode, is certainly audible, it should not be distracting to most people when this projector is being used in a business conference room environment. Changing to the “Eco” mode resulted in a noticeable decrease in noise level and to a level similar to that from a typical home theater projector when such a projector is operating in its normal mode.
The VS335W has a single 1 watt built-in speaker that produces adequate volume to not only overcome the projector’s fan noise but also is sufficient to provide the audio in a small classroom or conference room. As is expected from such a modest size built-in speaker and with only one watt of power, there is no real bass and the maximum volume is limited. Overall, the VS335W produces average sound quality and somewhat less available volume than is available from some other portable projectors, including some other models from Epson. It is adequate for providing voice narrations and background music in a small classroom or around a conference table. If used in a larger room, with students spread out over a greater area, then an external amplified speaker could be used instead of relying on the small, low powered, internal speaker.