The Behringer 2-XM is a semi-modular, duophonic analog synthesizer faithfully recreating the iconic Oberheim Two-Voice from 1975—one of the earliest polyphonic analog synths and a staple for 70s legends like Vince Clarke, Jan Hammer, and Vangelis. This Eurorack-compatible (80 HP) desktop module packs two independent SEM-style voices with a total of 4 VCOs, 2 multi-mode VCFs, 2 LFOs, 4 ADS envelopes, FM, PWM, a 2-channel mixer with pan, extensive 32-point patchbay for deep patching, MIDI/USB connectivity, and poly-chain capability (up to 16 units for 32 voices). It’s perfect for thick duophonic leads, layered pads, split-keyboard setups, unison stacks, or modular experimentation with that classic Oberheim warmth and grit.
Technical Specifications
| Item | Description |
|---|---|
| Type | Semi-Modular Duophonic Analog Synthesizer (inspired by Oberheim Two-Voice / SEM expander modules) |
| Polyphony / Modes | Duophonic (2 voices); Unison, Split, or Poly modes; Poly Chain up to 16 units (32 voices total) |
| Format | Desktop / Eurorack-compatible (80 HP width) |
| Dimensions (H × W × D) | Approx. 94 mm × 424.4 mm × 135.6 mm (3.7″ × 16.7″ × 5.3″) |
| Weight | Approx. 1.6–2 kg (3.5–4.4 lbs) |
| Power Supply | External 12 V DC adapter (included) or Eurorack bus |
| Current Draw (Eurorack mode) | +12 V: ~500–600 mA (estimated; check manual for exact) |
| Oscillators (4 × VCO total; 2 per voice) | |
| Waveforms | Variable shapes (saw/triangle/pulse) with adjustable pulse width (PWM) |
| Controls | Tune, Fine Tune, Osc Sync (hard sync between VCOs), FM cross-modulation |
| Modulation | LFO, envelopes, external CV |
| Noise Generator | White noise source for expanding timbres |
| Filters (2 × Multi-Mode VCF) | |
| Type | 12 dB/octave multi-mode (low-pass, high-pass, band-pass) per voice (SEM-style) |
| Controls | Cutoff Frequency, Resonance, Envelope Amount |
| Modulation | Envelope, LFO, external CV |
| Envelopes (4 × ADS) | 2 per voice (one for filter, one for VCA/amplitude) |
| Controls | Attack, Decay, Sustain |
| LFOs (2 total) | |
| Waveforms | Triangle, Square (or similar; per SEM style) |
| Rate | Adjustable; syncable or free-running |
| Destinations | Pitch, filter, PWM, etc. |
| Mixer Section | 2-channel mixer with level and pan controls per voice for stereo imaging |
| I/O | |
| Audio Outputs | Stereo 3.5 mm TRS (top panel), 2 × 1/4″ TRS (rear panel) |
| MIDI | 5-pin DIN In / Thru; USB Type B (Class Compliant) |
| Patch Points | 32 × 3.5 mm TS jacks (ext audio in, VCF CV, VCA CV, VCO CV, envelope outs, LFO outs, etc.) |
| Other | Portamento/Glide, Voice Priority selection, external audio processing |
| Additional Features | Semi-modular normalled signal path; extensive CV/gate patching; firmware updatable via USB |
Key Features & Signal Flow
- Dual SEM-style voices — Two fully independent analog paths (each with 2 VCOs, multi-mode VCF, ADS envelopes, LFO) for duophonic play; unison stacks 4 VCOs for fat mono tones, split for bass/lead separation.
- Multi-mode filters — 12 dB/oct SEM-inspired filters with LP/HP/BP modes for versatile tone shaping—from creamy leads to aggressive resonance sweeps.
- Extensive patching — 32-point patchbay breaks normals for custom routing: cross-mod FM, external audio through filters, envelope/LFO to multiple destinations, or complex modulation chains.
- Modern connectivity — MIDI/USB for DAW/sequencer control; poly-chain multiple units for true polyphonic setups up to 32 voices.
- Classic Oberheim character — Authentic analog warmth, oscillator sync, PWM, noise, and grit—great for 70s-inspired pads, arpeggios, basses, or sci-fi effects.
- Semi-modular workflow — Normalled path (VCOs → Mixer → VCF → VCA → Out) for instant play; patch freely for experimentation.
- Stereo & pan — Built-in mixer with pan controls for wide, spatial duophonic sounds.
- Versatile applications — Standalone desktop synth, Eurorack voice expander, or effects processor (external audio in).
Resources
- Official Behringer product page: https://www.behringer.com/product.html?modelCode=0718-ABA
- Quick Start Guide (PDF): https://cdn.mediavalet.com/aunsw/musictribe/TqgnPNs9FUiH-Py9-2lPgg/yhf35yTZP0uvSnDjHMQVyw/Original/QSG_BE_0718-ABA_2-XM_WW.pdf (or search Behringer downloads for “2-XM”)
- ModularGrid page: Search “Behringer 2-XM” on modulargrid.net (user patches, ratings, discussions)
- Retailer pages (Sweetwater, Thomann, Perfect Circuit): Specs, user reviews, demo videos, and bundles
- Demo videos: Search YouTube for “Behringer 2-XM demo” (official intros, hands-on reviews, sound design examples, Oberheim comparisons)
The Behringer 2-XM captures the essence of early polyphonic analog synthesis in a compact, patchable, and affordable package—ideal for vintage-inspired tones, modular integration, or building massive poly setups via chaining. A fantastic value for Oberheim fans or anyone seeking duophonic analog firepower. Highly recommended!
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