DML25-4 2" Distributed Mode Loudspeaker Transducer 20W 4 Ohm

Quick Overview

Dayton Audio's DML25-4 2" full-range DML speaker combines the compactness of an exciter with the pistonic air modulation of a standard speaker, making it perfect for use in sound bars and compact speakers where smooth off-axis response is needed.

Product Highlights

  • Unique, square-shaped from for tight driver-to-driver placement
  • Extended frequency response up to 15,000 Hz due to low inductance a motor
  • Wide off-axis dispersion for placement flexibility
  • Perfect for modern audio applications such as speaker bars and line arrays

Product Manuals / Spec Sheets / Downloads

Dayton Audio DML25-4 Specifications

Buying Options

The DML25-4 2" full-range transducer, from Dayton Audio, produces an amazing amount of quality sound on and off-axis while maintaining a small form factor. Designed to behave like a conventional pistonic driver at lower frequencies and a DML (distributed mode loudspeaker) and higher frequencies, this driver's unique shape lends itself to modern audio applications, such as a speaker bars, docking stations, and satellite speakers, where sound is to be heard without the source being seen.

Great off-axis directivity enables flexible placement options, while the wide frequency response (that extends from 150 Hz up to 15,000 Hz) delivers cost savings to engineers... no crossover components or frequency-specific drivers are required. The Dayton Audio DML25-4 is a natural selection for designing and building anything from thin column line array speakers to ultra-compact smart speakers.


Dimensions: Overall: 2.63" x 2.63" (66.8 x 66.8 mm), Cutout: 2.34" x 2.34" (59.5 x 59.5 mm), Depth: 1.04" (26.5 mm).

Model Number DLM25-4
Color Black
Unit of Measure Each
UPC 848791000959
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.25
Speaker Type Exciter
Power Handling (RMS) 20 watts
Power Handling (max) --
Continuous Program Power --
Impedance 4 ohms
Sensitivity --
Frequency Response 150 - 15,000 Hz
Voice Coil Diameter 25 mm
Magnet Weight --
DC Resistance (Re) 4.3 ohms
Voice Coil Inductance (Le) 0.09 mH (1k)
Resonant Frequency (Fs) 212 Hz
Mechanical Q (Qms) 3.83
Electromagnetic Q (Qes) 1.5
Total Q (Qts) 1.1
Diaphragm Mass Inc. Airload (Mms) 3.70 g
Moving Mass Of Diaphragm (Mmd) --
Mechanical Compliance of Suspension (Cms) 0.15 mm/N
Surface Area Of Cone (Sd) 4.64 cm2
Volume of Displacement (Vd) 0.7 cm3
BL Product (BL) 3.86 Tm
Compliance Equivalent Volume (Vas) 0.005 liters
Maximum Linear Excursion (Xmax) 1.5 mm
Drivers Mechanical Losses (Rms) --
Entry / Exit Diameter --
Surround Material --
Voice Coil Wire Material --
Voice Coil Former --
Basket/Frame Material --
Magnet Material --
Overall Outside Diameter --
Overall Depth --
Baffle Cutout Diameter --
Mounting Hole Diameter --
Bolt Circle Diameter --
Product Weight --