NHT Evolution L5 Home Theater Speaker System
Flatness is what it's all about today when you go shopping for home theater gear - and I'm not talking frequency response. Now that plasma and other flat-screen TVs rule, depth - the kind measured in inches - has become the kiss of death for anything that might share the light from the screen, like speakers.
In fact, the L5's drivers are nearly identical to those in the M5 satellite of the earlier Evolution system, re-engineered into a sleek, aluminum half-cylinder. NHT sent five L5s for the main channels, plus its four-piece U2 subwoofer system (photo on facing page): two passive subwoofers, each a 14-inch cube with a 12-inch driver, a slim A1 mono subwoofer power amp, and the similarly sized X1 crossover/controller.
Installing and connecting all the pieces of the U2 is more involved than hooking up your typical powered subwoofer, plus you need space for its two electronic components. But the system provides unmatched flexibility, with no fewer than five controls on the X1 to fine-tune subwoofer and crossover characteristics, including adjustable boundary compensation. You could experiment with placing the two subs in dissimilar locations, which some people believe can help smooth out the deep bass, though I've found little if any benefit over simply stacking two subs in my preferred location.
I started by connecting my receiver's subwoofer line-level output to the X1's RCA line input, then the X1's subwoofer output to the A1's input and the amp's single speaker-level output to the first U2 subwoofer. A pair of dual-banana jumpers on the first sub served to connect the second.