The 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-eraof 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 today's biggest artists. With premium components, true-to-original circuit design, and tape saturation control, the WA-MPX authentically reproduces all the analog tone of the original to bring vintage warmth and color to your sound.