Noisy fan can overpower weak internal speaker.
Wide-angle projection lens with steep keystone means this projector must be set up close to the screen. No monitor or audio outputs. Part of the credit goes to Texas Instruments, which manufactures the digital micro-mirror device at the heart of the LP420. While the DMD chip is similar in size to last year's, TI has increased the contrast ratio to the point where it's now better than that of most three-panel LCD projectors. In the past, TI's projector-manufacturing partners had to purchase complete DLP subassemblies, which consisted of everything from the lamp and power supply to the projection lens.