H-21FW550DM 21-Inch Ferrite Subwoofer Driver

21-inch ferrite subwoofer driver with a 2500–5000 W catalog-listed power range, 8 ohm impedance and 25–1000 Hz frequency response.

21-inch subwoofer format
2500–5000 W catalog power range
8-ohm impedance
Ferrite magnet
Die-cast aluminum basket

SPECIFICATIONS

Product details.

H-21FW550DM is a 21-inch ferrite subwoofer driver for professional loudspeaker systems. It has a catalog-listed power range of 2500–5000 W, 8 ohm impedance, a 25–1000 Hz frequency response and 98 dB sensitivity. Construction includes a die-cast aluminum basket, paper cone, ferrite magnet, GBF5.5-inch IN/OUT voice coil, double spider and silver yoke. Contact LESOUND with your application and cabinet requirements to discuss the model and order configuration.

Driver size: 21 in
Power (catalog range): 2500–5000 W
Impedance: 8 ohm
Frequency response: 25–1000 Hz
Sensitivity: 98 dB
Basket: Die-cast aluminum
Cone: Paper
Magnet: Ferrite
Voice coil: GBF5.5-inch IN/OUT
Spider: Double spider
Magnet shell: Silver yoke

SOURCING NOTES

Confirm the cabinet and power-rating basis.

H-21FW550DM is a raw 21-inch ferrite subwoofer driver, not a powered cabinet. Its verified record lists 8 ohm impedance, 98 dB sensitivity, 25–1000 Hz response and a 2500–5000 W catalog power range. The catalog does not identify that range as RMS, AES or peak; do not relabel it for amplifier matching.

For an OEM cabinet or replacement project, provide the enclosure design, existing driver reference and intended system. Request the mounting dimensions, depth, relevant electro-acoustic parameters and power/sensitivity test conditions before approving fit or performance. Diameter and impedance alone do not establish a drop-in replacement.

Compare the connection or component, not just the model name.

Review the full Speakers & Drivers selection guide. Other formats to evaluate: H-21FW601ND 21-Inch Neodymium Subwoofer Driver; H-18PD600 18-Inch Ferrite Subwoofer Driver. These are comparison options, not confirmed substitutes.

Prepare a model-specific quotation request.

Request a Quote keeps H-21FW550DM attached to your inquiry. Enter quantity and destination market, then use the message field for technical requirements and any OEM branding or packaging needs. LESOUND offers OEM/ODM support; feasibility, samples, MOQ and commercial terms are confirmed for the selected project.

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SAMPLE APPROVAL

Sample brief for H-21FW550DM.

Loudspeaker-system, replacement-driver and OEM speaker sourcing.

Provide the enclosure drawing, cutout, fixing pattern, amplifier and operating requirements before treating this driver as a replacement.
Request the power-rating test definition, sensitivity conditions, mechanical drawing and electroacoustic data. Catalog figures are not enclosure predictions or an independent test report.

Model source: LESOUND 2026 Speakers & Drivers catalog, PDF page 30. Packing, included accessories and model-specific OEM options require confirmation.

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APPLICATIONS