Our research includes 549 expert total reviews for 38 best deals on headphones under $400. The highest average score is 86%, while the lowest is 67% (a gap of 19%). There are about 14 reviews per product. Reviews come from sites like PCMag, Wired, and more. Click on a product to see more information (including which reviews were included). This list gets updated every few days as we routinely add the latest products.