Dual 15" flying subwoofer

  • Super-high-output dual HWNS4158 15" woofers maintain low distortion at extremely high SPLs
  • Dual front and rear signal connection points for front-firing or cardioid deployment
  • Integrated rigging shortens load-in and load-out times
  • Integrates easily into 2-, 3-, and 4-way system configurations with other X-Line Advance loudspeakers

The X-Line Advance X12-125F subwoofer produces impressive low-frequency impact and performance without losing musicality. In addition to its high output capability, the X12-125F is designed to acoustically match seamlessly with any X-Line Advance top cabinet as a ground stack subwoofer or as a flown subwoofer/LF array. Use Electro-Voice PREVIEW Loudspeaker Software to quickly and accurately achieve your desired coverage and confirm that your configuration is mechanically valid. PREVIEW also provides tools for the creation of steered/shaped subwoofer arrays.


Frequency response (-3 dB)1 36 - 215 Hz
Frequency response (-10 dB)1
29 - 1650 Hz
Coverage (H x V)
Omni directional

Rec. high-pass frequency
914 mm (36 in)
Max calculated SPL1 134 dB continuous, 140 dB peak
Configuration Parallel mode: Both woofers are internally wired in parallel on Pins 1+/1-. Dual mode: Each woofer is wired separately on Pins 1+/1- and 2+/2-.
Axial sensitivity1 99 dB (1 W/1 m)
Passive power handling2 3000 W continuous, 12,000 W
Impedance (1) 4 ohm (parallel mode), (2) 8 ohm (dual mode)
LF transducer 2 x 15 in HWNS4158
Connectors (4) NL8 type connectors (Two in front and two in back)
Enclosure 13-ply weather resistant birch with EVCoat, internally braced
Grille 14 GA powder coated galvanneal
Dimensions (H x W x D) 52.07 cm x 110.34 cm x 77.50 cm
(20.50 in x 43.44 in x 30.51 in)
Net weight 198 lb (89.8 kg)
Shipping weight 210 lb (95.3 kg)
1 Half-space anechoic measurement of single element.
2AES 2-1984 power test.

Recommended Amplifiers

For optimal sound system performance, Electro-Voice recommends the following amplifiers for X12-125F.

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Name Size Date
Environmental Compliance Document 148KB Oct 3, 2017
Name Language Size Date
X12-125F Engineering Data Sheet EN 1.18MB Oct 24, 2019
Name Language Size Date
X-Line Advance System Rigging and Transport Manual EN 56.63MB Feb 11, 2020
Name Size Date
EV SpeakerDB v1.1+ IRIS ZIP 28.48MB Feb 10, 2020
Name Size Date
Electro-Voice_PREVIEW_Early_Adopter_Windows_Beta_v1.4.1_Setup.exe 113.86MB Jul 29, 2020
Electrovoice-PREVIEW_Early_Adopter_MacOS_Beta_ v1.4.1.pkg 249.57MB Jul 29, 2020

X-Line HighRes Front3Quarter NoShadow Web

X Line HighRes FrontStraight NoShadow Web

X-Line HighRes Rear3Quarter NoShadow Web

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