Proton Hi-Fi 9/4

Reel-to-reel attributed to the 'Proton' brand. Note that 'Proton' covers more than one maker - the 1980s Proton hi-fi brand offered cassette and reel-to-reel decks, while the Soviet 'Proton' (Kharkov) made cassette machines - and this exact 'Hi-Fi 9/4' model could not be tied to reliable published specifications. Note: a second research pass did not turn up verifiable model-specific detail, so the entry is kept deliberately minimal rather than presenting unverified figures.