Sequential OB 6

Available in keyboard and desktop versions

$2999.00 / $2299.00

Want Sequential LLC analog VCOs? The OB-6 or the Prophet-6 as of this writing are the only 2 Sequential synths still made that have them. Other current Sequential models have analog DCO, digital or sample oscillators, which are also great choices.

Thanks!
-Yehuda

Manufacturer’s website
https://www.sequential.com

Product support, downloads
https://www.sequential.com/support

Strongly recommended that you download the newest OS, unless you hate bug fixes, stability and new features.

Required MIDI utilities to update OS
http://www.midiox.com (Windows)
https://www.snoize.com/SysExLibrarian (MacOS)

Facebook Group

Dave Smith and Sequential Instruments Synthesizers
https://www.facebook.com/groups/632898290179000

Videos

(Uptown Oscillators) UO Sequential OB-6 YouTube Playlist
Dave Smith Tom Oberheim OB-6 Video List
18 YouTube tutorial videos from Marc Doty / Automatic Gainsay

Useful links

Be sure to join the Uptown Oscillators Facebook Group!
https://www.facebook.com/groups/UptownOscillators

This page is a living document, subject to update and expansion. Last edited – 9/22/2019
If you have any content you think should be added, or would like to help author gear pages/posts, please leave a comment here or on our Facebook group.

Manufacturer Specifications: click to open/close or jump to comments

OB-6 Specifications

OSCILLATORS
  • Two discrete VCOs per voice
  • Continuously variable wave shape (sawtooth and variable-width pulse, plus triangle on oscillator 2) per oscillator
  • Pulse width per oscillator
  • Hard sync: oscillator 1 syncs to oscillator 2
  • Square wave sub-octave generator (oscillator 1) per voice
  • Low frequency mode (oscillator 2)
  • Keyboard tracking on/off (oscillator 2)
  • Oscillator detune amount for increased tuning instability, from subtle to extreme
MIXER
  • Oscillator 1 amount
  • Oscillator 1 sub-octave amount
  • Oscillator 2 amount
  • White noise amount
STATE-VARIABLE FILTER
  • Two-pole, resonant, filter per voice with low-pass, high-pass, band-pass, and notch functionality inspired by the original Oberheim SEM filter
  • Bi-polar filter envelope amount
  • Velocity modulation of envelope amount
  • Keyboard tracking: off, half, full
FILTER ENVELOPE
  • Four-stage (ADSR) envelope generator
  • Velocity modulation of envelope amount
AMPLIFIER ENVELOPE
  • Four-stage (ADSR) envelope generator
  • Velocity modulation of envelope amount
LOW FREQUENCY OSCILLATOR
  • Five wave shapes: sine, sawtooth, reverse sawtooth, square, and random (sample and hold)
  • Clock sync (internal or external MIDI clock)
  • Initial amount
  • Mod destinations: oscillator 1 frequency, oscillator 2 frequency, oscillator 1 and 2 pulse width, filter cutoff, filter mode, amp
X-MOD
  • Sources: filter envelope (bi-polar) and oscillator 2 (bi-polar)
  • Destinations: oscillator 1 frequency, oscillator 1 shape, oscillator 1 pulse width, filter cutoff, filter mode, normal to bandpass filter
AFTERTOUCH
  • Source: channel (mono) aftertouch with bi-polar amount
  • Destinations: oscillator 1 frequency, oscillator 2 frequency, LFO amount, amplifier envelope amount, filter envelope amount, filter mode
CLOCK
  • Master clock with tap tempo
  • BPM control and display
  • MIDI clock sync
ARPEGGIATOR
  • Selectable note value: 16th note, 8th note triplet, 8th note, dotted 8th note, quarter note
  • One, two, or three octave range
  • Up, down, up/down, random, and assign modes
SEQUENCER
  • Polyphonic step sequencer with up to 64 steps and rests
EFFECTS
  • Stereo analog distortion
  • Dual, 24-bit, 48 kHz digital effects, including: reverb (room, hall, plate, spring), delay (full bandwidth digital delay and emulated bucket brigade), chorus, flanger, phase shifters, and ring modulator
  • Delay sync
  • True bypass maintains fully analog signal path when digital effects are off
PERFORMANCE CONTROLS
  • Full-sized, semi-weighted, 4-octave keyboard with velocity and aftertouch
  • Backlit pitch and mod wheels
  • Spring-loaded pitch wheel with selectable range per program (1 to 12 semitones up and down)
  • Transpose controls for an 8-octave range
  • Hold switch latches held notes on
  • Polyphonic portamento
  • Unison (monophonic) mode with configurable voice count, from one to all six voices, chord memory, and key modes
  • Manual switch: when on, the front panel is live; what you see is what you hear
PATCH MEMORY
  • 500 user and 500 factory programs in 10 banks of 100 programs each
  • Direct program access, including single-button access to the current set of 10 programs
IN/OUT
  • Left/mono and right audio outputs (2 x 1/4” phone jack)
  • Headphone output (stereo, 1/4” phone jack)
  • MIDI in, out, and thru ports
  • USB for bidirectional MIDI communication
  • Filter cutoff expression pedal input
  • Volume expression pedal input
  • Sustain footswitch input
  • Sequencer start/stop footswitch input
POWER
  • IEC AC power inlet for internal power supply
  • Operates worldwide on voltages between 100 and 240 volts at 50 to 60 Hz; 30 watts maximum power consumption
PHYSICAL SPECS
  • 31.8” L x 12.7” W x 4.6″ H (80.7 cm x 32.3 cm x 11.7 cm)
  • 20 lbs (9.5 kg)
  • Walnut end panels

OB-6 Desktop Specifications

OSCILLATORS
  • Two discrete VCOs per voice
  • Continuously variable wave shape (sawtooth and variable-width pulse, plus triangle on oscillator 2) per oscillator
  • Pulse width per oscillator
  • Hard sync: oscillator 1 syncs to oscillator 2
  • Square wave sub-octave generator (oscillator 1) per voice
  • Low frequency mode (oscillator 2)
  • Keyboard tracking on/off (oscillator 2)
  • Oscillator detune amount for increased tuning instability, from subtle to extreme
MIXER
  • Oscillator 1 amount
  • Oscillator 1 sub-octave amount
  • Oscillator 2 amount
  • White noise amount
STATE-VARIABLE FILTER
  • Two-pole, resonant, filter per voice with low-pass, high-pass, band-pass, and notch functionality inspired by the original Oberheim SEM filter
  • Bi-polar filter envelope amount
  • Velocity modulation of envelope amount
  • Keyboard tracking: off, half, full
FILTER ENVELOPE
  • Four-stage (ADSR) envelope generator
  • Velocity modulation of envelope amount
AMPLIFIER ENVELOPE
  • Four-stage (ADSR) envelope generator
  • Velocity modulation of envelope amount
LOW FREQUENCY OSCILLATOR
  • Five wave shapes: sine, sawtooth, reverse sawtooth, square, and random (sample and hold)
  • Clock sync (internal or external MIDI clock)
  • Initial amount
  • Mod destinations: oscillator 1 frequency, oscillator 2 frequency, oscillator 1 and 2 pulse width, filter cutoff, filter mode, amp
X-MOD
  • Sources: filter envelope (bi-polar) and oscillator 2 (bi-polar)
  • Destinations: oscillator 1 frequency, oscillator 1 shape, oscillator 1 pulse width, filter cutoff, filter mode, normal to bandpass filter
AFTERTOUCH
  • Source: channel (mono) aftertouch with bi-polar amount
  • Destinations: oscillator 1 frequency, oscillator 2 frequency, LFO amount, amplifier envelope amount, filter envelope amount, filter mode
CLOCK
  • Master clock with tap tempo
  • BPM control and display
  • MIDI clock sync
ARPEGGIATOR
  • Selectable note value: 16th note, 8th note triplet, 8th note, dotted 8th note, quarter note
  • One, two, or three octave range
  • Up, down, up/down, random, and assign modes
SEQUENCER
  • Polyphonic step sequencer with up to 64 steps and rests
EFFECTS
  • Stereo analog distortion
  • Dual, 24-bit, 48 kHz digital effects, including: reverb (room, hall, plate, spring), delay (full bandwidth digital delay and emulated bucket brigade), chorus, flanger, phase shifters, and ring modulator
  • Delay sync
  • True bypass maintains fully analog signal path when digital effects are off
PERFORMANCE CONTROLS
  • Full-sized, semi-weighted, 4-octave keyboard with velocity and aftertouch
  • Backlit pitch and mod wheels
  • Spring-loaded pitch wheel with selectable range per program (1 to 12 semitones up and down)
  • Transpose controls for an 8-octave range
  • Hold switch latches held notes on
  • Polyphonic portamento
  • Unison (monophonic) mode with configurable voice count, from one to all six voices, chord memory, and key modes
  • Manual switch: when on, the front panel is live; what you see is what you hear
PATCH MEMORY
  • 500 user and 500 factory programs in 10 banks of 100 programs each
  • Direct program access, including single-button access to the current set of 10 programs
IN/OUT
  • Left/mono and right audio outputs (2 x 1/4” phone jack)
  • Headphone output (stereo, 1/4” phone jack)
  • MIDI in, out, and thru ports
  • USB for bidirectional MIDI communication
  • Filter cutoff expression pedal input
  • Volume expression pedal input
  • Sustain footswitch input
  • Sequencer start/stop footswitch input
POWER
  • IEC AC power inlet for internal power supply
  • Operates worldwide on voltages between 100 and 240 volts at 50 to 60 Hz; 30 watts maximum power consumption
PHYSICAL SPECS
  • 20.75” L x 7.8” W x 4.4″ H (52.0 cm x 19.8 cm x 11.2 cm)
  • 13.0 lbs (5.9 kg)
  • Walnut end panels