Sequential OB-6

Synth dreams are made of this

Now, finally, the artillery you need. The Sequential OB-6 has six discrete analog voices with two oscillators and one sub oscillator per voice. Of course, OB-6 is equipped with Dave's infamous X-mod (two sources, five destinations). In addition, there's a 64-step polyphonic step sequencer, two digital effects engines (with studio-grade reverbs, delays, chorus, flangers, and precise re-creations of Mr. Oberheim's famous ring mod and phase shifter), and an advanced arpeggiator. To control all this firepower, you have a knob-by-function top panel and a silky-smooth, semi-weighted, velocity- and aftertouch-enabled keyboard. From funk-laden basses and screeching, in-your-face leads to glorious celestial pads, the OB-6 makes your synth dreams come true.

The heart of the beast: Oberheim's classic SEM

Oberheim's original SEM (Synthesizer Expansion Module) formed the core of Tom's famed 4-voice and 8-voice synths from the 1970s. The SEM, in updated form, is also the core of the OB-6 analog sound engine. With two discrete voltage-controlled oscillators and one suboscillator per voice, the OB-6 gives you the flexibility of waveforms that are continuously variable between saw and variable-width pulse. Oscillator 2 also has a triangle wave. The classic Oberheim-style state-variable, 2-pole resonant filter has lowpass, highpass, bandpass and notch functionality. The all-analog signal path is completed by the OB-6's voltage-controlled amplifiers.

X-Mod, Poly Step Sequencer and Arpeggiator

The OB-6 features Dave Smith's brilliant X-Mod, which allows you to easily create killer sounds via modulation. The filter envelope and oscillator 2 are the sources, and both give you bipolar control. The five destinations are oscillator 1 frequency, oscillator 1 waveform, oscillator 1 pulse width, filter mode and filter cutoff. The polyphonic step sequencer lets you program polyphonic sequences (up to 64 steps, up to six notes per step), complete with rests, and sync them to an external MIDI clock. The full-fledged arpeggiator can also be synchronized with an external MIDI clock. You can configure the OB-6's number of voices in Unison Mode for up to six voices; it also features chord memory and key modes.

Specifications:

• Sequential OB-6 Keyboard
  
• analog synthesizer
  
• polyphony: 6
  
• oscillators:
  VCOs per voice: 2
  sub-octave oscillator (osc 1)
  low-frequency mode for osc 2
  mixer for osc1, osc2, sub and noise
  
• filter:
  LPF, BPF, HPF, notch (12dB) based on Oberheim SEM filter
  ADSR
  envelope depth controlled by play strength
  
• VCA:
  ADSR
  envelope depth controlled by play strength
  
• LFO:
  waveform: sine, saw, reverse saw, block, random (S&H)
  clock-sync (internal or external MIDI clock)
  extended routing
• modulation matrix
• arpeggiator
• polyphonic step sequencer (64 steps)
  
• effects:
  stereo analog distortion
  24-bit 48-kHz DSP - including reverb, delay, simulated BBD, chorus, flanger, phaser, ringmod
  delay sync
  true bypass
  
• keyboard: 49 keys, touch sensitive, aftertouch
  
• pitch and modulation wheels (LED illuminated)
  
• polyphonic portamento
  
• presets: 500 user sounds, 500 factory sounds
  
• connections:
  output: 2x 6.3 mm
  headphones: 6.3 mm
  MIDI in, out, thru
  USB-MIDI
  expression pedal for filter cutoff
  expression pedal for volume
  sustain footswitch
  sequencer-start/stop footswitch
  
• dimensions: 813 x 323 x 117 mm (32 x 12.7 x 4.6 inches)
  
• weight: 9.5 kg