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Fulcrum DF4

Dual High-Frequency Horn Loudspeaker

Key Features.

  • Operating Mode: Single-amplified w/ DSP

  • Operating Range: 320 Hz to 20 kHz

  • HF Transducers: 2x 4.0” titanium diaphragm, neodymium magnet compression driver

  • Power Handling at Nominal Impedance: 400 W @ 4 Ω

  • Equalised Maximum SPL (peak / continuous): 145 dB / 139 dB

45° x 30° // 60° x 30°


The DF4 is a high-output, dual high-frequency horn providing a precise coverage pattern for applications where spot-fill of high frequencies is required. Dual four inch diaphragm high frequency compression drivers provide substantial output suitable for mid to long throw applications.

Fulcrum Acoustic’s TQ™ processing is an integral part of the DF4 design. Sound, innovative acoustical design combined with state of the art digital processing leads to exceptional clarity and precise transient response, even at very high sound pressure levels. The required digital signal processing can be provided by one of many supported platforms.

The DF4 is particularly effective in applications where supplemental HF coverage may be required due to occlusion from the primary loudspeakers by hockey dasher boards, building structural elements, or similar. Its compact size allows mounting very close to ceilings or under balconies with minimal effect on sight lines. This makes it the perfect choice for sporting arenas and stadiums, houses of worship, theatres, restaurants, transportation facilities, theme parks, and more.


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