The A-100 Basic System 2 A-100BS2 is nearly identical with to the Basic System 1 but includes a MIDI-Interface. The modules A-150 (VC Switch) and A-162 (Trigger Delay) are replaced by the USB/Midi-to-CV/Gate/Sync interface  A-190-4 and a 2HP blind plate. In addition one of the two standard LFOs A-145 is replaced by the variable waveform LFO A-146.

These modules are included in the Basic System 2:

• 2x Standard VCO A-110
• 2x ADSR A-140
• 1 x LFO A-145
• 1 x LFO A-146
• 1x Ring Modulator A-114
• 1 x Audio Divider A-115
• 1 x VC Waveform Processor A-116
• 1 x Noise/Random A-118
• 1 x VCF1 A-120 (24dB low pass 1)
• 1 x XP VCF A-106-6
• 1 x linear VCA A-130
• 1 x exponential VCA A-131
• 1 x linear Mixer A-138a
• 1 x exponential Mixer A-138b
• 1 x Dual S&H A-148
• 1 x Trigger Divider A-160
• 1 x Trigger Sequencer A-161
• 1 x Dual Slew Limiter A-170
• 1 x Multiple I A-180
• 1 x USB/Midi-to-CV/Gate/Sync-Interface A-190-4
• 30 patch cables (mixed)

By default the modules of Basic System 2 are mounted into a 6U frame with built in power supply and bus boards. But the system is also available built into any A-100 case. Unused rows are closed with blind panels (e.g. A-100BS2 built into A-100LC9 or A-100P9). The valid prices for all combinations of systems and case are available in the price list in the A-100 section.