Alpine MDA-5051.
Probably released around 1998-9 based on the roundup review. There was a variant (NM051) made for Nissan that this listing claims was released in 1997.
Content adapted from: Autosound magazine review (RU) msrp
Alpine MDA-5051 User Manual ENG
Nissan ALPINE NM051:
Submit your own! Edit the page, use the photo submission form, or Contact us.