Like a new alt-rock record that recycles the basics of grunge, the Crystal Method's third disc is a throwback. For Scott Kirkland and Ken Jordan, it's still 1996, and bustling big-beat techno -- complete with rock guitars and vocal snippets (''Born Too Slow,'' featuring ex-Kyuss member John Garcia) -- remains a fresh concept. It no longer is, of course, making Legion of Boom a somewhat dated listening experience. But at least it's energetic nostalgia.

