Sequential Fourm 4-Voice Analog Synthesizer with Polyphonic Aftertouch
Product highlights
Product highlights
In the box
In the box
Free standard shipping
Free standard shipping
*Orders placed before 1 PM EST Mon - Thur will ship the same day. Orders placed beyond these hours will be shipped the next business day. Exclusions apply. See shipping policy
Free Local Pickup
Free Local Pickup
Please call for store stock availability. Requests made before 2:30 PM EST can be available for next-day pickup. Learn more
Fourm is a compact, expressive analog synthesizer designed to inspire. With its iconic Sequential tone, hands-on modulation, and a uniquely responsive keybed, Fourm is a creative partner that brings musical ideas to life.
Legendary Analog Sound, Reimagined
Built on the legendary Prophet-5 voice architecture, Fourm delivers four true analog voices with the unmistakable warmth and punch that defined a generation. Dual oscillators with simultaneous wave selection and a classic 4-pole low-pass filter (now with bass compensation) ensure that every note hits harder than the last.
A New Fourm of Expression
Fourm’s 37-note slim-key keyboard features polyphonic aftertouch, unlocking expressive techniques like guitar-style note bends, solo voice swells, and other nuanced articulations—completely transforming the experience of playing a modern Sequential polysynth.
Modulation You Can Touch
Inspired by the Pro~One, Fourm’s top-panel modulation matrix puts deep sound design at your fingertips. Route sources and destinations instantly, visualize connections with color-coded LEDs, and build complex mod paths in seconds — no menu diving, just pure creative flow.
Synthesis
| All oscillators have simultaneously selectable waveforms – LFO too | |
| Oscillator B supports low frequency modes | |
| Classic Prophet-style Sync | |
| 4-Pole resonant lowpass filter | |
| Feedback with aggressive drive circuit | |
| 2 ADSR envelopes | |
| Sequencer supports glide per step |
In/Out
| Main output mono (1/4in jack) | |
| Headphone output mono (1/4in TRS phone jack) | |
| MIDI in, out, and thru ports | |
| USB for bidirectional MIDI communication | |
| Footswitch/expression pedal input |
Power
| Separate power switch | |
| 12V DC 1.2A power supply, center-positive (included) | |
| Can be plugged into an AC outlet capable of supplying from 100 V to 240 V at 50 Hz/60 Hz. | |
| 14 Watts maximum power consumption. |
Physical Specs
| 22.13 in L x 9.88 in W x 2.75 in H (56.2 cm x 25.1 cm x 7.0 cm) | |
| Weight | 8.76 lbs. (3.97 kg) |
| Anti-theft slot |
Shipping & Returns
Frequently Asked Questions
How do I return an item?
How do I return an item?
Returns are incredibly simple. Please log into your account, find your item you wish to return and follow the prompts to make a return. If you do not have an account, click here to find your order and make a return.
Will I receive a full refund when I return an item?
Will I receive a full refund when I return an item?
You will receive a full refund when you return an item in its original manufacturer’s packaging, undamaged and unmarked. If the item you are returning is priced at less than $35, you will be charged a 15% restocking fee. Please note you will not be refunded any shipping charges.
How many days do I have to make a return?
How many days do I have to make a return?
You have 30 days to make a return. During the holiday season, from November 1 to December 31, we extend the return window to 60 days.
My item was damaged in transit. How do I place a return?
My item was damaged in transit. How do I place a return?
If your order has been noticeably damaged in transit, we strongly recommend that you refuse delivery and notify us immediately. Claims for missing items or items damaged in transit must be made within 48 hours of delivery. If there is carrier damage, please contact support@focuscamera.com with your order number and a description of the damage.
There’s an issue with my order, what should I do?
There’s an issue with my order, what should I do?
Oh no! Please contact our customer service team so we can resolve the issue immediately. You can call us on 1.800.221.0828, email us at support@focuscamera.com, or send us a message here.
Can I exchange an item?
Can I exchange an item?
We do not currently offer exchanges. Please return the item you purchased within 30 days and order what you’d like instead.
If I ordered a kit, do I have to return all the items?
If I ordered a kit, do I have to return all the items?
If you ordered a kit, you must return all components and accessories to receive a full refund.
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
I ordered a product that included a free item. I’d like to return it, do I need to return the free item as well?
If you ordered a product that included a free item, you must include the free item with your return. If not, your return will not be accepted and you will not receive a full refund.
Do you offer repairs?
Do you offer repairs?
We currently only offer camera repairs at our Brooklyn store. The item must be dropped off and collected in person as we do not accept shipped items for repair. For more information, please call our Brooklyn store on 1.718.431.7900.
What is your return policy?
What is your return policy?
Most items can be returned within 30 days for a full refund. Click here to read our full return policy.
