Sequential OB-6
UPC/EAN #855346000753
MPN #DSI-2700
The OB-6 is a once-in-a-lifetime collaboration between the two most influential designers in poly synth history, Dave Smith and Tom Oberheim.
The OB-6 takes the classic bold Tom Oberheim sound - with its true voltage-controlled oscillators, 2-pole filter, and amplifiers - and adds modern enhancements such as studio-quality effects, a polyphonic step sequencer, an arpeggiator, and more. No other modern analog poly synth can boast such a pedigree or such a massive, in-your-face sonic signature.
Vintage SEM Tone
The OB-6 sound engine is inspired by Tom's original SEM, the core of his acclaimed 4-voice and 8- voice synthesizers. It features two discrete voltage-controlled oscillators (plus sub-oscillator) per voice with continuously variable waveshapes (sawtooth and variable-width pulse, plus a triangle wave on oscillator 2). The classic Oberheim-inspired 2-pole, state-variable, resonant filter provides low-pass, high-pass, band-pass, and notch functionality. Voltage-controlled amplifiers complete the all-analog signal path.
Dual Effects
The dual effects section provides studio-quality reverbs, delays (standard and BBD), chorus, flangers, and faithful recreations of Tom's original phase shifter and ring modulator. While the effects themselves are digital, with 24-bit, 48 kHz resolution, a true bypass maintains a full analog signal path.
X-Mod and Poly Step Sequencing
Also present is X-Mod, which expands the tonal palette and makes it easy to create dramatic and unconventional sounds. Modulation sources are filter envelope and oscillator 2, both with bi-polar control. Destinations include oscillator 1 frequency, oscillator 1 shape, oscillator 1 pulse width, filter cutoff, and filter mode. The polyphonic step sequencer allows up to 64 steps and up to 6 notes per step. You can create sequences polyphonically, with rests, and sync to an external MIDI clock. The full-featured arpeggiator can be synced to external MIDI clock as well. Unison mode features configurable voice count (1-6 voices), chord memory, and key modes.
Easy to Program
The knob-per-function front panel puts virtually all OB-6 functions at your fingertips. Included are 500 permanent factory programs and 500 rewritable user programs. Turning on the Manual button enables live panel mode, in which the sound of the OB-6 switches to its current front panel settings. In this state, what you see is what you hear.
Easy to Play
This analog powerhouse is packed into a four-octave, semi-weighted keyboard with velocity and channel aftertouch, making it perfect for stage or studio.
Specifications
OSCILLATORS
Two discrete VCOs per voiceContinuously variable wave shape (sawtooth and variable-width pulse, plus triangle on oscillator 2) per oscillatorPulse width per oscillatorHard sync: oscillator 1 syncs to oscillator 2Square wave sub-octave generator (oscillator 1) per voiceLow frequency mode (oscillator 2)Keyboard tracking on/off (oscillator 2)Oscillator detune amount for increased tuning instability, from subtle to extreme
MIXER
Oscillator 1 amountOscillator 1 sub-octave amountOscillator 2 amountWhite 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 filterBi-polar filter envelope amountVelocity modulation of envelope amountKeyboard tracking: off, half, full
FILTER ENVELOPE
Four-stage (ADSR) envelope generatorVelocity modulation of envelope amount
AMPLIFIER ENVELOPE
Four-stage (ADSR) envelope generatorVelocity 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 amountMod 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 amountDestinations: oscillator 1 frequency, oscillator 2 frequency, LFO amount, amplifier envelope amount, filter envelope amount, filter mode
CLOCK
Master clock with tap tempoBPM control and displayMIDI clock sync
ARPEGGIATOR
Selectable note value: 16th note, 8th note triplet, 8th note, dotted 8th note, quarter noteOne, two, or three octave rangeUp, down, up/down, random, and assign modes
SEQUENCER
Polyphonic step sequencer with up to 64 steps and rests
EFFECTS
Stereo analog distortionDual, 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 modulatorDelay syncTrue bypass maintains fully analog signal path when digital effects are off
PERFORMANCE CONTROLS
Full-sized, semi-weighted, 4-octave keyboard with velocity and aftertouchBacklit pitch and mod wheelsSpring-loaded pitch wheel with selectable range per program (1 to 12 semitones up and down)Transpose controls for an 8-octave rangeHold switch latches held notes onPolyphonic portamentoUnison (monophonic) mode with configurable voice count, from one to all six voices, chord memory, and key modesManual 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 eachDirect 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 portsUSB for bidirectional MIDI communicationFilter cutoff expression pedal inputVolume expression pedal inputSustain footswitch inputSequencer start/stop footswitch input
POWER
IEC AC power inlet for internal power supplyOperates worldwide on voltages between 100 and 240 volts at 50 to 60 Hz; 30 watts maximum power consumption
PHYSICAL SPECS
32" L x 12.7" W x 4.6 H (81.3 cm x 32.3 cm x 11.7 cm)0 lbs (9.5 kg)
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