Be Quiet! is a German brand, part of Listan, that specializes in products that operate with minimal noise output. Till recently their products were mostly known inside Germany but they decided to expand to a wider market. Unfortunately at the time of the review they did not have a presence in the U.S. Their PSU products, from high-end to low-end, spans over the Dark Power Pro, Straight Power and Pure Power series. They have also several SFX, TFX and notebook PSUs.