Yamaha MD4 Digital Recorder Console 4 Tracks 2-Band EQ RCA 1/4" Inputs Studio

Yamaha MD4S 4-Track Multitrack MiniDisc Recorder Mixer Tested Used Japan

Mini Disc Yamaha MD4 Digital Multi Track

Sony MDM-X4 MkII Minidisc Multitrack Recorder 4-track Music Production Pro Audio

Zoom H4n Handheld Digital Recorder, 4 Tracks, Battery-Powered, XLR/USB

Zoom H4 Digital Recorder Handheld XLR In SD Card 4 Tracks Portable Audio

Tascam Porta 02 MKII, a vintage 4-track analog cassette recorder used/untested