The AN1x was one of the earliest virtual analog modelling synthesizers, and certainly one of the most popular.
While the AN1x may share its case style with the Yamaha CS1x, it is a completely different machine. Its eight multi-function knobs and large array of function buttons can be daunting at first but they give an excellent level of control over a vast number of parameters. It has onboard effects, scene memories, an excellent arpeggiator, and a ribbon controller. Add this to the pulse width modulation, ring modulation, and oscillator syncing capabilities and you have a very expressive and tweakable machine.
One common complaint with the AN1x is that it takes a long time to change patches. Waiting a second or two might not be much, but it can be annoying. The knob caps also tend to fall off, so it's not uncommon to find an AN1x with aftermarket replacement knobs (or no knobs at all).
It uses an external PA-3B power adapter.
Year Released: 1997
Keyboard: 61 keys with velocity and aftertouch
Polyphony: 10 notes
Multitimbral: 2 parts
User Patches: 128
Effects: variation x 14, delay x 5, reverb x 8, stereo 3-band EQ
Arpeggiator: 30 preset patterns
Screen: 15-character custom backlit LCD
Outputs: 2 x 1/4 inch outputs
Dimensions: 986 mm x 285 mm x 103 mm
Weight: 7.5 kg
Connections: MIDI in/out/thru, foot switch, foot controller, foot volume, 1/4 inch headphone jack.
Yamaha AN1 Keyboard ($669.02)