Sequential Fourm - 4-Voice Analogue Synthesiser
Best current price£680.94from eBay
Best offers
Shopping.co.uk recommended and popular offers
eBay£680.94Visit shop Sequential Fourm 4-Voice Analogue Synthesiser with Polyphonic Aftertouch
Visit shopeBay£680.94Visit shop All Offers
5 offers from £680.94 - £722.70
View price history by clicking the chart icon.
eBaySequential Fourm 4-Voice Analogue Synthesiser with Polyphonic Aftertouch
Free delivery in 1–3 days
£680.94
Visit shop
Sequential Fourm 4-Voice Analogue Synthesiser with Polyphonic AftertouchFree delivery in 1–3 days£680.94Visit shop →
Sequential Fourm 4-Voice Analogue Synthesiser with Polyphonic AftertouchFree delivery in 1–3 days£686.93Visit shop →
Sequential - Fourm, 37-Key 4-Voice Polyphonic Analogue Synthesizer with 128 PresFree delivery in 1–3 days£722.70Visit shop →
Scan ComputersSequential Fourm 4-Voice Polyphonic Analogue Synthesizer Seq-3900-Uk
Free delivery in 1–3 days
£699.00
Visit shop
Product Information
Full details
The Sequential Fourm is a powerful 4-voice analogue synthesiser tailored for musicians and sound designers who prioritize authentic, warm, and punchy vintage tones in a compact, portable form factor. Drawing inspiration from the legendary Prophet-5 architecture, it offers deep, knob-per-function sound design that eliminates menu diving; however, users should note that its 37-note slim-key format may feel cramped for those accustomed to full-sized piano weighted keys.
All features
| Model Part Number | SEQ-3900-UK |
|---|---|
| Brand | Sequential |
Extended Product Information
FAQs
Does the Sequential Fourm have internal effects?
No, the Fourm relies on its pure, raw analogue signal path, which is designed to be paired with external effects pedals or DAW plugins.
Can I save my own sound patches?
Yes, the Fourm allows you to save and recall your custom sound designs directly on the device.
Is the keybed velocity-sensitive?
Yes, the 37-note slim-key keyboard features both velocity sensitivity and polyphonic aftertouch for maximum expressivity.
Can the Fourm be poly-chained?
Please check the latest firmware manual for specific poly-chaining capabilities as they are subject to system updates.
What power supply should I use?
Always use the original power supply provided by Sequential to ensure stable voltage and prevent damage to the analogue circuitry.
Does it have a built-in arpeggiator?
The Fourm features a highly capable, hands-on arpeggiator that can be synced to external MIDI clock.
Troubleshooting
No sound output from the synth
Verify that your output cables are connected to the main left/right output jacks and that the filter cutoff is not fully closed.
MIDI messages not being received
Check that the MIDI channel on your controller matches the MIDI channel set in the Fourm settings and ensure the MIDI cables are correctly plugged into the MIDI IN port.
Polyphonic aftertouch feels unresponsive
Check your external software settings or global menu to ensure aftertouch velocity curves are set correctly for your playing style.
Pros and Cons
Pros
- Authentic Prophet-5 inspired analogue sound quality
- Hands-on, menu-free interface for efficient sound design
- Expressive polyphonic aftertouch keybed
- Compact and lightweight for live performance or small studios
Cons
- 37-note slim keys are less ideal for complex two-handed playing
- Limited to 4 voices compared to larger polyphonic synths
- Lacks extensive internal digital effects processing
Setup, Compatibility & Care
Connect the Fourm to your studio setup via standard 5-pin MIDI DIN or USB MIDI for host synchronization. To ensure longevity, always use the included power adapter. The wooden side panels and metal chassis should be wiped down with a soft, dry cloth; avoid using liquid cleaners or harsh chemicals. To prevent keybed wear, avoid leaving the unit in high-humidity environments and cover the keys when not in use to prevent dust accumulation between the slim keys.