Scott Wilkinson

Digital Projection International (DPI) might not be a familiar projector company to many home-theater enthusiasts—at least, not as familiar as Epson, JVC, Optoma, and Sony. But commercial users know the name well, because DPI has been supplying high-end, high-priced DLP projectors for broadcast, theatrical, simulation, medical, education, and corporate applications since 1997. In fact, DPI was Texas Instruments' first DLP partner and the original innovator of the 3-chip DLP projector.

Over the last few years, DPI has been directing more of its efforts toward home-theater applications and now offers seven series of products for that market. The most affordable home-theater model is the M-Vision Cine 230, a single-chip design that offers many of the same features found in the company's more expensive offerings for less than $7000.

As many of you know, I appear as a regular guest on The Tech Guy, a nationally syndicated call-in radio talk show hosted by Leo Laporte. The show airs live on Saturdays and Sundays from 11 AM to 2 PM Pacific time; some stations carry all or part of the show live, while others play the recording at different times. My segment is usually on Sundays right after the 11:30 AM news break, when I talk about home theater and answer reader and listener questions.

On February 5 and 6, I had the incredible opportunity to sit in for Leo as the guest host of The Tech Guy for the entire show. Leo was on vacation for three weeks, and I happened to be in the San Francisco Bay Area during that weekend, so we agreed that I would host the show from his studio, answering phone questions about—what else?—home theater.

In this blog, I've written about speakers with glass enclosures, such as several models from Perfect8, and even speakers with glass diaphragms, such as the Hario Harion. But I've never before seen glass speakers like those from Greensound Technology, in which a single, freestanding sheet of glass serves as the (almost) full-range diaphragm.