The Warm Audio WA-MPX is a single-channel tube microphone preamp that faithfully emulates the iconic 351-style preamps from the golden era of tape recording. Designed to deliver the rich, analog warmth and character that defined classic hits, it features a hand wired circuit with custom-wound CineMag transformers and three premium tubes per channel, providing up to 90dB of gain. The preamp includes a selectable all-analog tape saturation circuit, 80Hz high-pass and 2kHz low-pass filters, and a tone control to adjust input transformer impedance, offering versatile tone-shaping capabilities. Ideal for vocals, acoustic instruments, and mixing applications, the WA-MPX brings vintage analog tone to modern recordings.