Casio VZ-10M

The Casio VZ-10M is a late-1980's synthesizer with a sound generation engine based on phase distortion, which is similar to Yamaha's FM. It has 16-voice polyphony and has 64 each of user and factory preset patch memories.

Demo Video:

Yamaha FB-01

The Yamaha FB-01 is a half-rack synthesizer module. It is a 4-operator synth with 8 available FM algorithms. It is not designed for front-panel editing, so a computer editor should be used. It is known for its organ and bass sounds.

Specifications:
Year Released: 1986
MSRP: $350
Polyphony: 8 notes
Multitimbral: 8 parts
Patch Memories: 20
Connections: MIDI in, out, thru, 2x 1/4-inch audio outs

Yamaha DX100

Specifications:
Year Released: 1986
MSRP: $445
Keyboard: 49 Mini Keys
Polyphony: 8 Notes
Patch Memories: 192 Presets, 24 User Memories

Manual (1 of 2): http://www.soundprogramming.net/manuals/Yamaha_DX100_Manual1.PDF

Yamaha DX27

Specifications:
Year Released: 1986
MSRP: $695
Keyboard: 61 Keys
FM Operators: 4
Polyphony: 8 Notes
Patch Memories: 192 Presets, 24 User Memories

Manual (1 of 2): http://www.soundprogramming.net/manuals/Yamaha_DX27_Manual1.PDF

Akai Z8

Manual: http://www.soundprogramming.net/manuals/samplers/Akai_Z4-8_Manual.pdf
(Same as Z4 Manual)
Manual Errata: http://www.soundprogramming.net/manuals/samplers/Akai_Z4-8_Errata.pdf
(Same as Z4 Errata)

Akai Z4

User-Created Demo Video

Roland GS-500

http://www.soundprogramming.net/manuals/guitarsynth/Roland_GS-500_Manual.pdf

Roland G-77

http://www.soundprogramming.net/manuals/guitarsynth/Roland_G-77_Manual.pdf

Roland RD-300SX

Manual: http://soundprogramming.net/manuals/digital_pianos/Roland_RD-300SX_Manual.pdf
MIDI Implementation: http://soundprogramming.net/manuals/digital_pianos/Roland_RD-300SX_MidiImplementation.pdf

Roland RD-300S

Manual: http://soundprogramming.net/manuals/digital_pianos/Roland_RD-250S_RD-300S_Manual.pdf
(Same as Roland RD-250S)