Dual 5.25-in LF cones, vented; 1-in exit HF compression driver, horn-loaded.

UB52i Passive Two-Way Rectangular Enclosure


A 2-way full range system (passive LF/HF crossover) in a compact, vented rectangular enclosure. Includes two 5.25 in woofers and a 1 in exit compression driver on a 90° x 60° constant directivity horn. It includes two 1/4″-20 threaded mounting/suspension points.

The UB52 is engineered to provide secondary full range coverage from a stage lip or apron mounting location. Also very effective as an ultra-low profile under balcony fill system. Its 6.28-in height allows it to be mounted within stage steps and hidden from view.

Six year warranty.

  •  Two-way, full range loudspeakers
  • Compact, vented rectangular enclosure
  • Ultra-low profile



Transducer: LF 2x 5.25-in cone; HF 1x 1-in exit, 44mm voice coil compression driver

Loading: LF Vented; HF Horn-loaded


Operating Range (-10 dB, Hz)

50 – 18k

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

Full Range: 91

Power Handling/Impedance (Watts @ Ohms)

Full Range: 175 @ 8

Calculated Maximum Output Peak (dB SPL)

Full Range: 119

Calculated Maximum Output Long Term (dB SPL)

Full Range: 113

Nominal Coverage (degrees)

Horizontal: 90

Vertical: 60


LF: 2x 5.25-in cone, vented

HF: 1-in exit compression driver, horn-loaded


Full range



UB52i Black 0027777-90

UB52i White 0027778-90

UB52iPL-WP Black 0027779

Dimensions (inches/millimeters)

Height: 6.2/158

Width: 19.8/503

Depth: 8.1/206

Weights (pounds/kilograms)

Net: 19/8.6

Shipping: 21/9.5