Doepfer Dark Energy II - Synthesizer

Conditions: Like NEW! 

Dark Energy II is a monophonic stand-alone synthesizer with USB and Midi interface. The sound generation and all modulation sources are 100% analog, only the USB/Midi interface contains digital components. Dark Energy is built into a rugged black metal case with wooden side plates. High quality potentiometers with metal shafts are used and each potentiometer - except the filter mode control - is fixed to the case (no wobbly shafts and knobs). The distance between the controls is a bit wider compared to A-100 modules and knobs with vintage look are used.

VCO

• Sawtooth based VCO core
• manual tune control (with an internal jumper the range can be set to ~ +/-1 half an octave or ~ +/-2.5 octaves)
• range switch -1 / 0 / +1 octave
• frequency range about 32 Hz/C0 (reference note and octave switch in position -1) to about 4.2 kHz/C8 (reference note plus 5 octaves and octave switch in position +1)
• FM (frequency modulation) control with modulation source switch (LFO1 / off / ADSR)
• manual pulsewidth control for rectangle waveform
• PWM control with modulation source switch (LFO2 / off / ADSR)
• waveform switch (sawtooth / off / clipped/inverted sawtooth) 
• the sum of the waveform chosen by this switch and the rectangle is fed into the VCF (to turn the rectangle off the PW control has to be set fully CCW)
• external CV input for VCO frequency (1V/octave)
• external CV input for external PWM of the rectangle
• internal CV input for frequency (1V/octave) connected to the CV1 output of the built-in USB/Midi interface
• because of the pure analog circuit and the temperature control it may take up to 30 minutes until the VCO is in tune.

VCF

• 12dB multimode filter with lowpass, notch, highpass and bandpass 
• mode control for continuous transition from lowpass via notch to highpass and along to bandpass
• manual frequency control
• tracking switch half - off - full (internally connected to the external frequency CV input of the VCO, i.e. the VCF tracks to the VCO if the switch is set to "half" or "full" position)
• exponential frequency modulation control (XFM) with modulation source switch (LFO2 / off / ADSR),the XFM control has polarizer function, i.e. the modulation source (LFO2 or ADSR) selected by the Source switch may affect the filter frequency in a positive (right half of the control range) or negative way (left half of the control range)
• manual resonance control (up to self oscillation)
• external audio input (this signal is added to the VCO signal)
• external CV input for filter frequency
• 1V/octave tracking for usage of the VCF as a sine wave oscillator over a few octaves  (not as precise as the VCO and not temperature compensated, but much better than most of the other filters)

VCA

• manual amplitude control (initial gain)
• AM (amplitude modulation) control with modulation source switch (LFO1 / off / ADSR)
• external CV input for VCA amplitude
• exponential scale.

LFO1 and LFO2

• manual frequency control
• waveform switch (triangle / off / rectangle)
• range switch (low, audio, medium)
• LED display (dual green/red color for positive/negative share of the signal)
• the LFO1 signal is available as an additional socket (to use the LFO1 signal for external modules)
• an internal jumper can be used to select between the LFO1 signal or the inverted LFO1 signal

ADSR

• manual controls for Attack, Decay, Sustain, Release
• range switch (long, short, medium)
• blue LED display
• ADSR signal is available as an additional socket (to use the ADSR signal for external modules)
• External Gate input (normalled via switching contact of the socket to the Gate output of the built-in USB/Midi interface)