Scan-Speak 12MU/4731T00 'Illuminator'

Midrange driver with a low‑mass moving system.

Scan‑Speak 12MU/4731T00 uses a one‑piece cone and dust cap, which reduces moving mass and increases rigidity in the central area of the diaphragm. This construction supports accurate midrange performance and maintains stability at higher output levels. The low‑loss suspension provides linear excursion with minimal mechanical damping.

The motor system is based on an under‑hung neodymium design. A long magnetic gap and a short voice coil create a uniform magnetic field across the entire excursion range. The patented Symmetrical Drive SD‑3 system reduces inductance variation and lowers nonlinear distortion associated with coil position changes.

The open basket structure improves airflow around the moving system and reduces compression effects. A lightweight four‑layer voice coil and a rigid spider ensure precise control of diaphragm motion under dynamic operating conditions.

• Nominal impedance [Zn]: 4 Ω
• Resonance frequency [fs]: 64 Hz
• Sensitivity [2.83 V⁄1m]: 90 dB
• Equivalent volume [Vas]: 5.4 l
• Total Q factor [Qts]: 0.24

See also:

Scan-Speak 12MU/4731T00 - information in PDF format (454 Kb)

Review in Hobby HiFi #3-2015 Magazine (in German, 762 kБ)

Review in Voice Coil #6-2012 Magazine (in English, 1.2 мБ)

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