Jomox ModFM Eurorack Synth
Jomox ModFM Eurorack Synth
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        Description / Specs
      
    
  Description / Specs
Jomox Mod FM – 8-Voice Eurorack FM Synthesizer
The Jomox Mod FM is a fully self-contained 8-voice FM synthesizer in Eurorack format. Combining a digital FM engine with true analog filters, VCAs, and modulation capabilities, the Mod FM bridges the gap between classic FM synthesis and analog warmth.
With 4 operators per voice, 2 LFOs/VCOs, and full multitimbrality, the Mod FM delivers everything from metallic FM tones to snappy techno percussion and lush, analog-style textures. Each voice is fully independent with its own CV/Gate inputs, dedicated output, analog filter, and VCA, making it one of the most flexible FM synths available in Eurorack.
Key Features
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8 voices, each fully multitimbral 
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4 operators per voice with full modulation matrix (26 algorithms) 
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ADSR envelopes per operator, frequency modes (key-tracked or fixed Hz) 
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2 LFOs per voice (64 waveforms), switchable into full audio-range VCOs 
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Dedicated analog filters per voice (SSI2140 – modern SSM2040 design) - 
24 dB low-pass 
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12 dB multimode LP/BP/HP with continuous crossfade (shape) 
 
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True analog VCAs per voice for snappy response 
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Metal Noise generator for extra percussive/experimental textures 
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FX engine: stereo reverb + 2x delay (syncable via MIDI clock; includes flanging-style micro delays) 
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Matrix interface with 16 endless encoders + dual OLED displays for fast editing 
Connectivity & Control
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CV/Gate per voice 
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CV modulation inputs for each operator 
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Dedicated outputs for each voice + stereo mix out (odd/even split) 
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MIDI I/O (TRS Type A) and USB-C (MIDI over USB) 
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Full storeability of sounds, including CV amounts 
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128 presets + 118 multi sets (multi mode = independent voices with individual sounds) 
Specifications
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Sound Engine: Hybrid FM (digital operators + analog filters/VCAs) 
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Operators: 4 per voice, arranged in full modulation matrix 
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Algorithms: 26, derived from DX9 architecture 
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LFOs/VCOs: 2 per voice, 64 waveforms, switchable to audio range 
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Filters: SSI2140 per voice, 24 dB low-pass + 12 dB multimode 
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Envelopes: ADSR for operators + filters 
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FX: Stereo reverb, dual delay (MIDI-sync) 
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Displays: 2× 128×64 OLED 
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Presets: 128 
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Multis: 118 
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Power: +12V 370 mA / –12V 170 mA (≈ 6.5 W total) 
Dimensions
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Width: 56 HP (≈ 284 mm) 
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Height: 3U (≈ 129 mm) 
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Depth: 40 mm 

 
         
         
         
               
               
              