Two-way passive fullrange loudspeaker


Two-way passive, reflex loaded fullrange loudspeaker

Cost effective stand-alone fullrange loudspeaker

Signature EM Acoustics passive crossover for unprecedented frequency and phase response

12" neodymium LF drive unit, 1" exit neodymium HF compression driver

The EMS-121X is a compact, powerful fullrange loudspeaker intended for a wide variety of applications – both mobile and permanently installed. The EMS-121X is ideal for applications requiring fullrange performance with low weight, or where the extended power of a larger HF drive unit is not necessary. EMS-115, 215 or 118 subwoofers can be added to extend system response where required. The EMS-121X is completely passive yet outperforms many bi-amplified or processed designs.

  • 80° x 60° constant coverage waveguide
  • Premium 15mm multi-laminate birch plywood enclosure
  • Black or white textured paint finish
  • Optional weather protection or RAL custom colours
  • Multiple threaded rigging points compatible with OmniMount and Powerdrive brackets, pole mount socket
  • Hex punched steel grille backed with acoustically transparent black foam

The enclosure contains a 12” (305mm) neodymium LF drive unit, linked via the internal passive crossover network to a 1.7” (44mm) diaphragm, 1” (25mm) exit HF compression drive unit. The HF drive unit is coupled to a constant-directivity waveguide, which produces an 80°H x 60°V dispersion pattern, which yields not only consistent response throughout its operating band across the whole coverage pattern but also strong attenuation outside of this pattern.

The robust enclosure is constructed from premium multi-laminate Birch plywood and is finished in impact resistant textured paint. Two NL4 connections are provided on the rear for input and enclosure link. The front of the loudspeaker is protected by a rigid steel grille backed with acoustically transparent foam. A flush bar handle, 35mm polemount socket and various threaded fixings are provided in the enclosure for optional rigging hardware. RAL colour matching and weather protection options are also available if required.

The EMS-121X requires a single amplifier channel, and should be used with professional power amplifiers capable of delivering 600-800W RMS into an 8-ohm load. For optimum results, the EM Acoustics DQ10 or DQ20 Advanced System Amplifiers, or the AQ Series power amplifiers in conjunction with the DSC48 system controller (for loudspeaker protection) should be used.

Enclosure TypeTwo-way passive, reflex loaded
Components1 x 12" (305mm) neodymium LF drive unit
1 x 1.7" (44mm) exit neodymium HF drive unit
Dimensions (HxWxD), mm/(ins)

595 (23.4) x 355 (14) x 342 (13.5)

Net/Shipping Weight19/21kg (41.8/48.4lbs)
Frequency Response70Hz - 20kHz ± 3dB
Nominal Dispersion80°H x 60°V (-6dB points)
Maximum SPL127dB continuous, 133dB peak
Power Handling400W RMS, 800W program
Nominal Impedance8 ohms

FC-121Xv vertical flying cradle

FC-121Xh horizontal flying cradle

DFB-121X dual enclosure flying plate set

Case Studies