Sequential Prophet-6 6-Voice Polyphonic Analog vs Sequential Oberheim OB-6 6-voice Polyphonic: Spec Comparison
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The sequential prophet 6 6 voice polyphonic analog vs oberheim ob 6 6 comparison highlights two distinct analog synthesizers from Sequential. Both units offer 6-voice polyphony and share a black finish. The Prophet-6 features a 49-key layout and discrete voltage-controlled oscillators. The Oberheim OB-6 includes a semi-weighted keyboard with velocity and aftertouch. It also provides a 64-step polyphonic step sequencer and a state-variable filter. These differences shape their respective sound and playability profiles.
Key differences
| Aspect | Sequential Prophet-6 49-Key Analog Synthesizer | Sequential Oberheim OB-6 6-Voice Synthesizer |
|---|---|---|
| Number of Keys | 49-key | not listed |
| Key Action | not listed | Semi-weighted |
| Oscillators | Discrete VCOs | 2 Oscillators + 1 Sub Oscillator per voice |
| Filter | Discrete Filters | State-variable Filter |
| Sequencer | Dual Effects Section | 64-step Polyphonic Step Sequencer |
| Weight | 27.6 pounds | 2 pounds |
Which one should you choose?
Choose Sequential Prophet-6 49-Key Analog Synthesizer if
- You prefer discrete VCOs and filters for a classic analog sound
- You need a compact 49-key layout for portability
- You want dual effects processing built into the synth
Choose Sequential Oberheim OB-6 6-Voice Synthesizer if
- You require velocity and aftertouch for expressive playing
- You want to sequence patterns directly with the polyphonic step sequencer
- You prefer a semi-weighted keyboard feel
Verdict: Choose the Prophet-6 if you prioritize discrete circuitry and a compact 49-key form factor. The Oberheim OB-6 is better if you need expressive key action and built-in sequencing. Both deliver six voices of analog synthesis.
Prophet-6 vs OB-6 Spec Breakdown
Number of Keys
The Sequential Prophet-6 is equipped with a 49-key layout, offering a compact footprint for studio or stage use. This shorter keyboard length allows for easier transport and fits well in smaller setups. The Sequential Oberheim OB-6 does not list a specific key count in the provided specifications. When key count is missing, you cannot determine the playability range relative to the Prophet-6. For players needing a specific number of keys, the Prophet-6 provides a confirmed 49-key option. The OB-6 data leaves this detail open, requiring you to check other sources for the exact key count.
Key Action Type
The Oberheim OB-6 features semi-weighted keys, which provide a tactile response that bridges the gap between synth action and piano feel. This action type can aid in expressive playing for many musicians. The Prophet-6 specifications do not explicitly state the key action type in the provided data. Without this specific detail, you cannot directly compare the tactile feel of the keys between the two units. If you prioritize a semi-weighted feel, the OB-6 offers a confirmed specification for this feature. The Prophet-6 leaves the key action type undefined in the current data set.
Physical Dimensions
Both synthesizers share nearly identical width measurements at 18.3 inches, ensuring they fit similarly on standard desk or rack spaces. The Prophet-6 has a height of 8.5 inches and a length of 37.8 inches. The Oberheim OB-6 is slightly shorter in height at 8.25 inches and marginally shorter in length at 37.5 inches. These minor differences in height and length may affect how they sit on your bench or desk. The Prophet-6 is slightly taller and longer, while the OB-6 is more compact in these specific dimensions.
Build Weight
Weight is a critical factor for portability and stability. The Prophet-6 weighs 27.6 pounds, indicating a solid build that resists accidental movement during performance. The Oberheim OB-6 data lists a weight of 2 pounds, which appears to be a data error or a partial listing, as analog synthesizers of this class are significantly heavier. Assuming the OB-6 is a full-sized analog unit, its actual weight is likely comparable to the Prophet-6. However, based strictly on the provided numbers, the Prophet-6 has a listed weight that suggests substantial build quality.
Color Finish
Both the Sequential Prophet-6 and the Oberheim OB-6 share the same black color finish. This uniformity means you can match them aesthetically if you own both units or plan to use them in a multi-synth setup. The visual consistency simplifies stage or studio design decisions. Neither unit offers alternative color options in the provided specifications. For buyers who prioritize a cohesive look across their gear, both synthesizers provide a matching black exterior that blends seamlessly with other black equipment.
Which Sequential Analog Synth Fits You
Studio users needing a compact 49-key layout
The Prophet-6 offers a 49-key configuration that fits smaller workspaces. Its discrete VCOs and filters provide a specific analog tone. The unit measures 37.8 inches long and weighs 27.6 pounds. This size allows for easy transport while maintaining a substantial build quality for your production environment.
Performers wanting semi-weighted keys and aftertouch
The Oberheim OB-6 features a semi-weighted keyboard with velocity and aftertouch sensitivity. This key action supports expressive playing techniques during live sessions. It also includes a 64-step polyphonic step sequencer for pattern creation. The state-variable filter adds tonal versatility for dynamic performance settings.
Sound designers requiring a polyphonic step sequencer
The OB-6 includes a built-in 64-step polyphonic step sequencer. This feature allows you to create complex patterns without external gear. The semi-weighted keys respond to your touch, enhancing control over modulation. The compact dimensions of 37.5 inches long make it a practical addition to any studio rack or desk.
The products compared
Sequential Prophet-6 49-Key Analog Synthesizer
Best for: Compact analog sound design
- Number of Keys
- 49
- Color
- Black
- Dimensions
- 37.8 × 18.5 × 8.86 inches
- Weight
- 27.8 pounds
View on Amazon: Sequential Prophet-6 49-Key Analog Synthesizer Affiliate link
The Sequential Prophet-6 is a 6-voice polyphonic analog synthesizer featuring discrete VCOs and filters. It includes an enhanced poly mod section and dual effects. This 49-key model measures 18.3 by 8.5 by 37.8 inches and weighs 27.6 pounds. It suits musicians seeking a compact analog sound source with built-in processing for studio or stage use.
Pros
- 6-voice polyphonic analog architecture with discrete VCOs and filters
- Enhanced poly mod section for complex sound design
- Dual effects section integrated into the signal path
- Compact 49-key layout fits smaller workspaces
Cons
- 49-key keyboard limits polyphonic range compared to 61-key models
- 27.6-pound weight adds bulk for frequent transport
- No mention of Bluetooth or app control for parameter editing
Good fit if
- You need a compact analog synth for a limited desk space
- You want discrete analog circuitry with dual effects
- You prefer a 49-key layout for melodic playing
Skip if
- You require full-sized 61-key or 88-key range
- You need wireless connectivity for mobile control
- You prioritize a lightweight instrument for travel
Verdict: The Sequential Prophet-6 49-Key Analog Synthesizer delivers robust analog sound in a manageable footprint. It fits producers who value discrete circuitry and effects without needing extensive key range.
Sequential Oberheim OB-6 6-Voice Synthesizer
Best for: Analog synth enthusiasts needing a sequencer
- Key Action
- Semi-weighted
- Color
- Black
- Dimensions
- 37.5 × 18.3 × 8.25 inches
- Weight
- 2 pounds
View on Amazon: Sequential Oberheim OB-6 6-Voice Synthesizer Affiliate link
The Sequential OB-6 is a 6-voice polyphonic analog synthesizer featuring two oscillators and a sub-oscillator per voice. It includes a velocity and aftertouch-enabled semi-weighted keyboard for expressive playing. The unit integrates a 64-step polyphonic step sequencer and a state-variable filter. This black model measures 37.5 inches in length and 18.3 inches in width. It suits players seeking classic analog texture with modern sequencing capabilities.
Pros
- 6-voice polyphonic analog architecture
- Two oscillators and sub-oscillator per voice
- Velocity and aftertouch-enabled keyboard
- 64-step polyphonic step sequencer
- State-variable filter
Cons
- Semi-weighted key action may lack feel for some
- Heavy at 2 pounds per foot of length
- No display mentioned for parameter editing
Good fit if
- You want rich analog tones
- You need a built-in sequencer
- You prefer tactile controls
Skip if
- You require weighted keys
- You need extensive display feedback
- You want a compact travel size
Verdict: The Sequential OB-6 Analog Synthesizer delivers classic analog sound with a 64-step sequencer. It fits players who value polyphonic analog texture and tactile control over digital convenience.
Specifications side by side
| Spec | Sequential Prophet-6 49-Key Analog Synthesizer | Sequential Oberheim OB-6 6-Voice Synthesizer |
|---|---|---|
| Number of Keys | 49 | not stated |
| Key Action | not stated | Semi-weighted |
| Color | Black | Black |
| Dimensions | 37.8 × 18.5 × 8.86 inches | 37.5 × 18.3 × 8.25 inches |
| Weight | 27.8 pounds | 2 pounds |
| Size | medium | not stated |
| Model | DSI-2600 | SEQDSI-2700 |
Frequently asked questions
What is the main physical difference between the Prophet-6 and OB-6?
The Prophet-6 features a 49-key layout, making it more compact. The OB-6 does not specify a key count in its listed dimensions, suggesting a different form factor. Both share a black finish. The Prophet-6 measures 37.8 inches long, while the OB-6 is slightly shorter at 37.5 inches. This affects desk space requirements.
Which synthesizer is lighter to transport?
The OB-6 is listed at only 2 pounds, making it significantly lighter than the Prophet-6. The Prophet-6 weighs 27.6 pounds. This large weight difference suggests the OB-6 data may refer to a component or packaging, as the full unit is heavier. For heavy transport, the Prophet-6 requires more effort due to its solid build.
Do both models share the same brand lineage?
Yes, both synthesizers are manufactured by Sequential. The Prophet-6 carries the model number DSI-2600, while the OB-6 uses SEQDSI-2700. They both deliver analog sound through discrete circuitry. Sharing the brand ensures consistent build quality and control layout philosophy across both units for users familiar with Sequential instruments.
How do the dimensions compare for studio placement?
The Prophet-6 is 18.3 inches wide and 8.5 inches high. The OB-6 shares the same 18.3-inch width but is slightly shorter at 8.25 inches high. Both are 6-voice polyphonic analog units. The height difference is minimal, but the Prophet-6 is longer, requiring more horizontal desk space for proper ventilation and access.
Is the Prophet-6 better for small studios?
The Prophet-6 is designed for compact analog sound design. Its 49-key layout fits smaller workspaces better than full-size keyboards. The unit measures 37.8 inches in length. This manageable footprint allows producers to integrate it into tight setups without sacrificing the robust analog tone provided by its discrete voltage-controlled oscillators.
What color options are available for these units?
Both the Prophet-6 and the OB-6 are available in black. This consistent color scheme allows for a unified look when placing them side by side. The black finish is standard across these Sequential models, providing a professional appearance suitable for both studio environments and live stage performances.