History: the MX-5050 line

Otari introduced the MX-5050 in the mid-1970s as a compact, affordable professional recorder — a studio-grade quarter-inch machine priced within reach of small studios, broadcasters, and serious home recordists. The first generation, with its brushed-metal preamp face, picked up the nickname "Mini Pro", and it stuck.

The original Mini Pro is a two-speed deck (7.5/15 in/s) built around an induction motor transport, taking reels up to 10.5". It was succeeded by the MX-5050B (and later BII, BIII, and the MKIII/MKIV families), which changed the electronics and transport significantly — which is why so much of the information online about "the MX-5050" doesn't quite apply to the first machine.

This page is being expanded as I verify details against period documentation. If you have first-generation sales literature or can correct something here, the corrections are welcome — this site exists to get the record straight.

Where the Mark I fits

| Generation | Face | Notes | | --- | --- | --- | | MX-5050 (Mark I, "Mini Pro") | Silver, brushed metal | Original. 2-speed, induction motor. This site's subject. | | MX-5050B / BII / BIII | Darker trim | Revised electronics and transport; the most common variants today. | | MX-5050 MKIII / MKIV | — | Later families, multiple track formats. |