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Square 4-inch pro sound driver with rectangular waveguide, aluminium diaphragm and ferrite magnet

Beyma

Beyma 4" 8Ω 25W AES pro sound driver

SKU CH-SWJJ-M44PN

4-inch 8 Ω compression driver rated 25 W AES with 105 dB sensitivity, 3.5–20 kHz range and neodymium magnet for line-array waveguides

  • High 105 dB sensitivity for loud, clear output
  • 25 W AES power handling for reliable performance
  • 3500-20000 Hz range covers critical high frequencies
  • 140° x 40° dispersion pattern for focused coverage
  • 75 kg lightweight neodymium design eases installation

Professional compression driver

This Beyma 4-inch compression driver handles 25 W AES and 50 W program power with an 8 Ω nominal impedance. It is built for pro sound reinforcement where high output and controlled dispersion are required. The aluminium diaphragm and neodymium magnetic circuit deliver 105 dB sensitivity at 1 W/1 m when coupled to a horn.

Straightforward horn mounting

The unit features a 3 x 0.4-inch rectangular exit that bolts directly to compatible waveguides using the 107 mm bolt circle. A 92 mm cutout is needed for flush installation. The 1.5-inch voice coil and ferrite magnet keep the assembly light at 1.7 kg, simplifying cabinet integration.

5 kHz minimum crossover point

The recommended crossover frequency is 5 kHz or higher with a 12 dB/octave minimum slope. Operating below this point risks mechanical damage and uneven coverage. The driver’s usable range extends from 3.5 kHz to 20 kHz, with effective acoustical coupling up to 18 kHz.

How it compares

Measured against everything we stock in Pro Audio Equipment, at today’s prices. Recalculated every night.

Price $126.99
Pricier than about 68% of the 613 comparable items (median $56.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I confirm the driver is performing correctly after installation?

Measure on-axis output at one metre with one watt input while coupled to the specified horn; the reading should reach 105 dB and the impedance curve should show a minimum of 8 Ohms at 9 kHz.

What comes in the box and what must I source separately?

The package contains the compression driver with its 3-in by 0.4-in rectangular exit waveguide; a compatible horn, a crossover network set at 5 kHz or higher with at least 12 dB per octave slope, and mounting hardware are not included.

Which power rating should I use when choosing an amplifier for this unit?

Use the 25 W AES continuous rating for thermal limits and the 50 W program rating for short-term peaks; the 1.75-in voice coil and 1.55 T flux density support this power handling.

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