Yamaha DX7 versus DX7ii (Mk2, DX7S)
1:15:14
Yamaha DX7 vs. Korg M1 vs. Roland D-50 | The 3 Horsemen of the Digital Apocalypse
15:50
Lets fix an original Yamaha DX7 Synthesizer
16:52
I bought a YAMAHA DX7 for $100 - can I FIX it?
31:29
Why I purchased a 1983 Yamaha DX7 in 2017.
22:47
ORIGIN OF THE DX7 & FM SYNTHESIS
7:08
Yamaha DX7
1:01:10
DX7s Repair (not just a battery change)
8:24