5.25-in LF cone, vented; 1-in soft dome tweeter.

UB12Si 2-Way Full-Range Compact Loudspeaker


Despite its compact size, the UB12Si will faithfully deliver high-output, high-definition sound for a wide variety of professional applications. All system elements, including drivers, crossover/filter components, and the enclosures themselves are designed to meet EAW’s rigorous standards for reliablility and durability.

The system operates in fully passive mode with an internal passive crossover/filter network both dividing the signal and providing critical equalization functions.Each UB12Si includes a robust 5.25-in woofer mounted in an optimally vented enclosure and a 1-in soft dome tweeter specifically designed to provide smooth, studio-quality high-frequency reproduction.

As a stand alone system, the UB12Si delivers full range output at surprisingly high levels with flat response for a wide range of professional audio applications including multimedia production and presentation, corporate audio/visual systems, retail spaces, project recording studio, and home theaters.

It is also a popular choice as a secondary distributed reinforcement system providing additional coverage in virtually any large scale installation such as theaters, performing arts centers, houses of worship and even arenas and stadiums.The ultra-compact enclosures can be unobtrusively mounted almost anywhere.

The system includes 1/4-in threaded mounting points, two sets of which are configured to accept an Omnimount Series 20.5. They are also magnetically shielded for use in immediate proximity to video monitors making them an excellent choice for any multimedia application.

Six year warranty.

  • Ultra-compact two-way system
  • 5.25-in LF/1-in tweeter
  • Magnetically shielded for use with video monitors
  • High-output, high-definition sound from an ultra-compact enclosure



Transducer: LF 1x 5.25-in cone; HF 1-in soft dome tweeter

Loading: LF Vented

Operating Mode:

Amplifier Channels: Single-amp LF/HF

External Signal Processing: High pass filter


Operating Range (-10 dB, Hz)

60 – 20k

Axial Sensitivity (1W @ 1m, dB SPL)

Full Range: 89

Power Handling/Impedance (Watts @ Ohms)

Full Range: 140 @ 8

Calculated Maximum Output Peak (dB SPL)

Full Range: 117

Calculated Maximum Output Long Term (dB SPL)

Full Range: 111

Nominal Coverage (degrees)

Horizontal: 120

Vertical: 120


LF: 5.25-in cone, vented

HF: 1-in soft dome tweeter


Full range



UB12Si Black 0027773-90

UB12Si White 0027774-90

UB12SiMTPL-WP 64W Black 0027776

UB12SiMTPL-WP 64W White 0027775

Accessories Part Number
U-Bracket Black
U-Bracket White

Dimensions (inches/millimeters)

Height: 10.75/273

Width: 6.38/162

Depth: 6.00/152

Weights (pounds/kilograms)

Net: 9/4.2

Shipping: 12/5.4