Check the listing for details. Warm Audio WA-MPX. Color: see description, Condition: New. Listed at 1116.45 USD. WA-MPX is an authentic reproduction of the most revered tube microphone preamplifier that ushered in the birth of rock 'n' roll and radio-ready hits. During the golden era of tape recording, this type of vintage tube preamp became the signature sound of many hit artists, including Elvis Presley, Kurt Cobain, Les Paul and Bing Crosby. With premium components, a faithful circuit design and adjustable tape saturation, WA-MPX authentically reproduces the analog sound of the original to add warmth and color to every signal. All of our items have a 30-day return policy without explanation. Notes, reading and software are excluded from the exchange. The General Terms and Conditions of Zoundhouse GmbH & Co. KG apply. If you intend to buy multiple items: put them into your shopping cart and cho.