Thanks for the replies, guys. I've had a couple of the GR 12" DIY subs listed in the trading post, and recently had a PM regarding the L12 being an equivalent. I hadn't heard of the L12, so looked it up, and at first blush it appears quite similar, but thought for the price difference for the GR driver/amp alone, there must be more to the story. Yeah, the amp on the L12 doesn't have nearly the connections and tuning flexibility as the PEQ370, but was curious what else might be different about it. And same with the drivers.
Does anyone have any more specific information to compare the two sets of drivers/amps?