Let's start with 3D, since I didn't discuss that yet, at least not here. The blacks are very good considering price. In 3D the blacks are really dark, the combination of the general performance of the H9500 Acer in terms of contrast and blacks, combine with 3D, as usual eating up about 75% of available brightness. I even ran the H9500DB, in 3D along with the almost twice the price, higher end Epson Home Cinema 5010. Now that projector lacks dynamic iris functionality when in 3D, but is superb at blacks, beating all but a handful of more, and of far more, expensive projectors.
Unfortunately for the Epson, their dynamic iris stays off. Fortunately, the inherent black level abilities of the Epson, even when not using the iris, are truly impressve.
So, the bottom line - Acer really performs with the top of its class when it comes to blacks and shadow detail. These are key strengths of the Acer H9500!