Sequential OB-6 – Oberheim’s Classic Voice Reimagined

The Sequential OB-6 is a modern, all-analog polysynth that revives Tom Oberheim’s legendary SEM-based sound in a 6-voice design. Featuring true voltage-controlled oscillators, a 2-pole state-variable resonant filter, and lush analog signal paths, it delivers the unmistakable Oberheim character. Enhanced with stereo effects, a polyphonic sequencer, and an arpeggiator, the OB-6 combines vintage tone with modern flexibility in a performance-ready instrument.

Key Features

• Six analog voices: True VCOs with classic Oberheim warmth
• Signature filter: 2-pole, state-variable resonant design inspired by Oberheim SEM
• Performance-ready keyboard: 49 semi-weighted keys with velocity and aftertouch
• Polyphonic step sequencer: 64 steps with parameter sequencing
• Onboard effects: Stereo reverbs, delays, chorus, phaser, and ring modulation
• Hands-on workflow: Knob-per-function interface with no menu diving
• Extensive presets: 500 factory + 500 user programs

Customer Benefits

The OB-6 delivers the lush, organic sound of Oberheim’s classic instruments with modern reliability and performance features. Its immediate hands-on interface and expressive keyboard make it ideal for both stage performers and studio producers looking to add authentic analog depth to their music.

Quick Specs

• Voices: 6 analog voices
• Oscillators: 2 VCOs per voice + sub oscillator
• Filters: 2-pole, state-variable resonant filter
• Effects: Dual stereo effects with true bypass
• Sequencer: 64-step polyphonic with parameter recording
• Arpeggiator: Multiple modes, syncable to MIDI clock
• Presets: 1000 total (500 factory + 500 user)
• Keyboard: 49 semi-weighted keys with velocity & aftertouch
• Dimensions: 80 × 32 × 11.4 cm
• Weight: 9.5 kg

What’s in the Box

• Sequential OB-6 synthesizer
• Power supply
• User documentation

Use Cases / Ideal For

Perfect for producers and keyboardists seeking authentic Oberheim analog sound in a modern instrument. Ideal for lush pads, brass, soaring leads, and evolving textures in both live and studio settings.

Pros & Cons

✅ Pros:

• Authentic Oberheim-inspired analog tone
• Expressive 49-key keyboard with aftertouch
• Modern effects, sequencer, and arpeggiator
• Hands-on control with zero menu diving

⚠️ Cons:

• 6-voice polyphony may be limiting for complex arrangements
• Less compact than the desktop module version

The Sequential OB-6 is a perfect fusion of Oberheim’s iconic analog sound and Sequential’s modern innovations, delivering one of the most expressive and characterful polysynths available today.