ASUS on Friday announced it will soon add two notebooks to its multimedia N-series, including the 16-inch N61 and 17.3-inch N71. Among the improvements, ASUS is touting a new SonicMaster amplification system that includes new paper-foam cones for the speakers that are said to improve sound quality. Both the N61 and N71 will be available with Intel's Core 2 Duo or Core 2 Quad CPUs and with up to 4GB of RAM.