OB-6 - Synthesizer Sequential - Free user manual and instructions
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| Product Type | Polyphonic Analog Synthesizer with Digital Effects |
| Dimensions (W x D x H) | 30 x 13 x 4 inches (76 x 33 x 10 cm) |
| Weight | 22 lbs (10 kg) |
| Power Supply | Internal AC power supply; 100-240V AC, 50-60Hz; IEC connector |
| Voice Architecture | 6-voice polyphonic; 2 DCOs per voice with saw, pulse, triangle, sine, noise |
| Filter | 2-pole state-variable filter (low-pass, high-pass, band-pass, notch) with resonance |
| Envelope Generators | 2 ADSR envelope generators (filter and amplitude) |
| LFOs | 2 LFOs with triangle, saw, square, random, sample & hold, and step generator |
| Effects | Digital effects: reverb, delay, chorus, phaser, flanger, ring modulator, distortion |
| Arpeggiator & Sequencer | Polyphonic step sequencer (up to 64 steps); arpeggiator with multiple modes |
| Keyboard | 61-key semi-weighted velocity and aftertouch sensitive keyboard |
| Connectivity | MIDI In/Out/Thru; USB (MIDI only); 1/4" audio outputs (L/Mono, R); headphone out; sustain pedal; expression pedal; CV/Gate in/out |
| Memory | 500 factory programs + 500 user programs; 500 combos; 500 sequences |
| Display | OLED display with navigation controls |
| Maintenance & Cleaning | Use a dry, soft cloth to clean surfaces. Avoid solvents or abrasive cleaners. Keep away from moisture and dust. |
| Safety | Use only the supplied power cord. Do not expose to rain or moisture. Ensure adequate ventilation. Unplug when not in use for extended periods. |
| Spare Parts & Repairability | Contact Sequential/DSI customer service for authorized service centers and spare parts. Do not attempt internal repairs yourself. |
| General Information | Manufacturer: Sequential (formerly Dave Smith Instruments). Country of origin: USA. Designed and engineered in California. |
Frequently Asked Questions - OB-6 Sequential
How do I save a patch on the OB-6?
Press the STORE button, then select a location using the VALUE encoder and press STORE again to confirm.
Can I use the OB-6 as a MIDI controller?
Yes, the OB-6 sends MIDI note and controller data over its MIDI OUT port or via USB. Set the MIDI channel in Global settings.
How do I update the firmware?
Download the latest firmware from the Sequential website. Transfer via MIDI SysEx using a MIDI interface or USB (if supported). Follow the update instructions carefully.
What is the difference between the OB-6 and the Prophet-6?
The OB-6 has a state-variable filter inspired by the Oberheim SEM, while the Prophet-6 uses a Curtis low-pass filter. The OB-6 also includes unique distortion and effects.
How do I initialize a patch to the default state?
Press RECALL and select the INIT preset, or hold RECALL and press STORE at the same time to load the default init program.
Can I connect the OB-6 to a computer via USB?
Yes, the OB-6 has a USB port that sends and receives MIDI. It will appear as a MIDI device on your computer. No driver installation is needed for most systems.
How do I use the arpeggiator?
Press the ARP button to activate it. Use the RATE knob to set speed and the ARP MODE switch (up, down, up/down, random, etc.). Hold notes to create patterns.
What is the power consumption?
The OB-6 consumes approximately 25 watts. Always use the provided power cord and ensure proper voltage (100-240V AC).
Does the OB-6 have a battery for memory backup?
No, the OB-6 uses flash memory to store patches and sequences, so no battery is needed. Data is retained even when powered off.
How do I perform a factory reset?
Go to Global Settings (press and hold SHIFT + WRITE), navigate to Factory Reset, and confirm. This will erase all user data.
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USER MANUAL OB-6 Sequential
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Product information
Brand : Sequential
Model : OB-6
Category : Synthesizer