User Manual for Sequential OB-6 6-Voice Polyphonic Analog Synthesizer Click to enlarge the picture
Contents of the user manual for the Sequential OB-6 6-Voice Polyphonic Analog Synthesizer
- Product category: Synthesizer Keyboards Sequential
- Brand: Sequential
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Sequential Synthesizer Keyboards
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User manual for the Sequential OB-6 6-Voice Polyphonic Analog Synthesizer contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Sequential product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Sequential user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Sequential product will considerably shorten its lifespan!
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Product description The OB-6 from Dave Smith Instruments is a modern, all-analog 6-voice polyphonic synthesizer that pays tribute to Tom Oberheim's SEM 4-voice and 8-voice synthesizers, but with several enhancements. The synth features true voltage-controlled oscillators, a classic Oberheim-inspired 2-pole, state-variable resonant filter, amplifiers, envelopes, and an LFO. Additional enhancements include studio-quality effects, a polyphonic step-sequencer, and an arpeggiator; all of which can be synchronized internally or via external MIDI clock.
The four-octave, semi-weighted keyboard offers velocity sensitivity and channel aftertouch, while the control panel offers knob-per-function control with no menu diving. There are 500 permanent factory programs and 500 user programs which are organized into 10 banks of 100 presets. The OB-6 offers an ideal combination of portability and power for the project studio or the gigging musician. - Two Legends. One Instrument
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- The OB-6 is a collaboration between Dave Smith and Tom Oberheim, two of the most influential designers in poly synth history. 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
- Vintage SEM Tone
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- Sound engine inspired by Tom Oberheim's original SEM synthesizers
- Two discrete voltage-controlled oscillators (plus sub-oscillator) per voice
- Continuously Variable Waveshapes: Sawtooth and variable-width pulse, plus a triangle wave on oscillator 2
- Classic Oberheim-inspired 2-pole, state-variable, resonant filter with low-pass, high-pass, band-pass, and notch functionality
- VCA: Voltage-controlled amplifiers
- Dual Effects
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- Dual Effect Engine: 24-bit/48 kHz resolution
- Studio-quality reverbs, delays (standard and BBD), chorus, and phase shifter
- True bypass maintains a full analog signal path
- Independent stereo 100% analog distortion effect
- X-Mod and Poly Step Sequencing
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- Modulation Sources: Filter envelope and oscillator 2 (both with bi-polar control)
- Destinations: Oscillator 1 frequency, oscillator 1 shape, oscillator 1 pulse width, filter cutoff, and filter mode
- Unison Mode: Configurable voice count (1-6 voices) and key modes
- Polyphonic Step Sequencer: 64 steps with up to 6 notes per step with rests. Syncs to an external MIDI clock
- Arpeggiator: Syncs to external MIDI clock
- Easy to Program
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- Knob-per-function front panel offers instant access to virtually all OB-6 functions
- 1000 Presets: 500 permanent factory programs and 500 user programs organized into 10 banks of 100 programs
- Live Panel Mode: Switches from a preset to current knob and switch settings
- Easy to Play
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- Four-octave, semi-weighted keyboard with velocity and channel aftertouch
- Programmable Backlit Pitch Wheel: 1 to 12 semitones
- Backlit modulation wheel
UPC: 855346000753 In the Box Sequential OB-6 6-Voice Polyphonic Analog Synthesizer IEC Power Cord Limited 1-Year Warranty Table of Contents
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Technical parametersSequential DSI-2700 Specs | Oscillators | 2x discrete VCOs per voice
Wave Shape per Oscillator (Continuously Variable): Sawtooth and variable-width pulse, plus triangle on oscillator 2
Pulse width per oscillator
Hard Sync: Oscillator 1 syncs to oscillator 2
Square Sub-Octave Generator: Oscillator 1 per voice
Low-Frequency Mode: Oscillator 2
Keyboard Tracking: On/off (oscillator 2)
Oscillator Detune: 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 | | Envelope Generators | Filter Envelope: Four-stage (ADSR) envelope generator with velocity modulation of envelope amount
Amplifier Envelope: Four-stage (ADSR) envelope generator with velocity modulation of envelope amount | | LFO | 5x 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
1, 2, or 3 octave range
Up, down, up/down, random, and assign modes | | Sequencer | Polyphonic Step Sequencer: 64 steps and rests | | Effects | Stereo analog distortion
Dual, 24-bit, 48 kHz Digital Effects: Reverb (room, hall, plate, spring), delay (full bandwidth digital delay and emulated bucket brigade and tape delays), chorus, and phase shifter
Delay sync
True Bypass: Maintains fully analog signal path when digital effects are off | | Controls | Keyboard: Full-sized, semi-weighted, 4-octave with velocity and aftertouch
Pich Wheel: Backlit, spring-loaded with selectable range per program (1 to 12 semitones up and down)
Mod Wheel: Backlit
Transpose: 8-octave range
Hold Switch: latches held notes on
Polyphonic Glide: Portamento
Unison (Monophonic) Mode: 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 | 1000 Programs: 500 user / 500 factory programs in 10 banks of 100 programs each
Direct program access, including single-button access to the current set of 10 programs | | Input & Output | Left/Mono & Right Audio Outputs: 2 x 1/4" / 6.35 mm phone jack
Headphone Output: Stereo, 1/4" / 6.35 mm phone jack
MIDI: In, out, and thru ports
USB: Bi-directional MIDI communication
Filter cutoff expression-pedal input
Volume expression-pedal input
Sustain footswitch input
Sequencer start/stop footswitch input | | Power | 100/240 volts at 50/60 Hz
Power Consumption: 30 W maximum
IEC AC power inlet for internal power supply | | Dimensions (L x W x H) | 32.0 x 12.7 x 4.6" / 81.3 x 32.3 x 11.7 cm | | Weight | 20.0 lb / 9.1 kg | | | | Package Weight | 31.5 lb | | Box Dimensions (LxWxH) | 37.9 x 19.0 x 9.3" |
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