After having created perfection in the Rx, ALO are free to experiment. Their first experiment, The Continental, is quite a hit, especially as it packs valves under the bonnet for a truly classical sort of listen. But as ALO explain, the use of limited valves means that the Continental has a shorter time on this planet. Enter The National, an amp that they reckon is the answer to the Continental. I can tell you right now: The National is a single box that can fill the void of both portable and living room headphone amp.