Warm Audio WA-MPX Authentic Reproduction Of The Most Revered Tape-Era Tube Mic PreampThe WA MPX is an authentic reproduction of the most revered microphone tube preamp that pioneered the birth of rock n roll & radio ready hits. During the golden era of tape recording, this style of vintage tube preamp became the signature sound in the signal chain of hit recordings including Elvis Presley, Kurt Cobain, Les Paul, and Bing Crosby and is a sound that is still pursued by todays biggest artists. With premium components, true to original