40 years of the four-track, as the Portastudio powers on | E&T Magazine
File:TASCAM Ministudio PortaOne - 4 track cassette tape recorder (c.1986).jpg - Wikimedia Commons
Sold at Auction: Ross – 4x4 Series II – 4-Track Cassette Recorder – w/Power Supply
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File:Yamaha MT2X 4-track cassette recorder.jpg - Wikimedia Commons
TASCAM Portastudio 414MKII 4-track Cassette Recorder for sale online | eBay
Midwest Photo Tascam DR-40X Four Track Digital Audio Recorder and USB Audio Interface
Yamaha MT4X Multitrack Cassette Tape Recorder Analog 4 track Used | eBay
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Portastudio - Wikipedia
Fostex Model 250 4-Track Cassette Recorder / Mixer | Reverb
TASCAM Pocketstudio DP-004 Portable Digital 4-Track Recorder | Reverb
40 years of the four-track, as the Portastudio powers on | E&T Magazine
Roland R-44 Professional compact high-density four-track recorder Built-in microphone and monitor speakers 48V phantom power
Yamaha MT4X 4-Track Cassette Tape Recorder - Pixel Pro Audio
TASCAM Portastudio 414 4-Track Cassette Recorder | Reverb
Vintage Tascam Porta Two Cassette Four-Track | Performer Mag
