Product Description

Dual 15″ Two-Way Sound Reinforcement Loudspeaker System

BY-125 from Proel Audio is a portable, dual 15″, two-way speaker system designed specifically for applications in live music performance and music playback.


  • Dual Proel low frequency drivers with a 64 mm (2.5 in) diameter edge-wound ribbon voice coil which provides more cross-sectional wire area in the voice coil gap than round wire designs, for greater efficiency and power handling.
  • Ferro-fluid cooled compression driver with titanium diaphragm improves high frequency performance as well as system reliability.
  • The advanced network topology crossover design shapes frequency response and delivers coherent summation in the crossover region.
  • A “Quasi 3-Way” design offers the extra bass for which a dual fifteen system is designed, but without sacrificing performance in the critical mid-range. The upper woofer produces mid-frequencies and bass, while the lower woofer concentrates on bass only. The reduction in mid-range phase cancellation greatly improves midrange sound quality and coverage.
  • High-voltage capacitors and inductors with massive cores and heavy gauge wire enable the crossover network to handle high power without saturating.
  • Progressive Transition™ highfrequency waveguide provides superior coverage control, reduced distortion, and smoother frequency response.
  • The rugged, acoustically superior enclosure is constructed from 19 mm (.75 in) MDF (Medium Density Fiberboard) using advanced adhesives and mechanical fastener technology for extreme durability and improved low-frequency performance.
  • SonicGuard™ protects the highfrequency driver from excess power without interrupting the performance.
  • Non-resonant, all-steel handles are used.
  • Attractive 18-gauge perforated, steel grille protects components from damage.

What’s in the box

  • Proel Audio BY-125 Dual Passive Loudspeaker


Power Rating 500 W / 2000 W
Frequency Range 36 Hz – 16 kHz (-10 dB)
Dimensions (H x W x D) 1099 mm x 464 mm x 432 mm (43.25 in x 18.25 in x 17 in)
Frequency Response 45 Hz – 12 kHz (±3 dB)
Sensitivity 100 dB SPL (1w/1m)
Nominal Impedance 4 ohms
Recommended Amplifier Power 500 W to 1000 W into 4 ohms
Maximum SPL 133 dB
Nominal Dispersion 90º x 50º
Crossover Frequency 2 kHz
Weight 42.6 kg (94 lb)
High Frequency Driver Transition™ Waveguide
Low Frequency Driver M128 x 2
Input Connectors Neutrik® Speakon® NL-4 (x1); .25 in TS phone jack (x1); parallel


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