Loyola Enterprises

A veteran and minority owned SDB Certified Business.



757.498.6118 Ext - 109QRx-153/75 - Call for pricing - 15-inch three-way 400 watt loudspeaker


PDFQRx-153/75 Specifications (pdf)

The QRx153/75 is a bi-amped three-way full-range loudspeaker system capable of filling performance spaces with beautifully balanced audio and high acoustic output capability. The QRx153 is designed to be bi-amplified at 500 Hz utilizing a DX38 digital controller, or a P1202 power amplifier with M153 control module. All QRx models use 13 ply plywood, Futura coating, and steel grilles for wear and weather resistance. The QRx153 is trapezoidal with 15° side angles. “L” track rigging is installed on the enclosure top and bottom. Small arrays can be flown for live work, or the system can be suspended horizontally or vertically for fixed installations.

Thanks to its combination of the DL15ST woofer and large enclosure volume, the horn-loaded 8" midrange driver, and powerful 3" compression driver, the EV QRx153/75 has extended response for high-level, high fidelity applications without the need of a subwoofer. The horn-loaded midrange driver provides excellent pattern control in this critical response area. Both MF and HF horns are aimed downward 10° to provide optimal aiming when the speaker is elevated above the audience. This also helps control sound to provide greater intelligibility. The QRx153/75 has an excellent combination of performance and flexibility for demanding audiences.


  • 15" Three-Way Biamped Speaker System with Horn-Loaded Midrange
  • 8" MF horn loaded for 75° x 50° pattern control to 500 Hz
  • 3" DH7 HF compression driver
  • 15" DL15ST woofer is loaded into vented enclosure
  • Asymmetric MF and HF horns have +15° / -35° coverage
  • RMD™ - Ring-Mode Decoupling for vocals and mids with superb fidelity at any listening level
  • The EV P1202 Precision Series Amplifier and M153 module are designed to power the QRx153 perfectly
  • L-track rigging is installed on top and bottom of the enclosure
  • Parallel Neutrik® NL4 input connections

Frequency Response (-3dB) 50 Hz–16 kHz LF Power Handling 400 W cont. / 800 W prog. / 1600 W peak
Frequency Range (-10dB) 42 Hz–20 kHz MF/HF Power Handling 150 W cont. / 300 W prog. / 600 W peak
Sensitivity 1 W/1 m (LF/HF) 98 dB / 105 dB LF to MF Crossover 500 Hz
Max SPL/ 1m (calc) 130 dB Crossover Frequency (passive) 1200 Hz
Coverage (HxV) 75° x 50° Nominal Impedance (LF/HF) 8 Ω / 12 Ω
Connectors (2) Neutrik Speakon NL4’s Transducers (LF/HF) DL15ST / MF8, DH7
Enclosure Material 13-ply Birch plywood Grille Powder coated steel, fabric backed
Suspension L-Track w/Ancra fittings Q and DI Q = 12 / DI - 10.8
Dimensions (HxWxD) 124.0 x 46.7 x 48.5 cm
(41.5" x 18.4" x 19.12")
Weight 44.09 kg (97 lbs)
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or