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BMT25-4 Balanced Mode 2" Transducer 20W 4 Ohm

Quick Overview

Dayton Audios BMT (Balanced Mode Transducer) full-range speaker combines the compactness of an exciter with the pistonic air modulation of a standard speaker, making it perfect for use in sound bars.

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 BMT25-4 Specification Sheet

The BMT25-4 2" full-range transducer, from Dayton Audio, produces an amazing amount of quality sound while maintaining a small form factor. Designed to move air like a traditional speaker, this drivers 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 BMT25-4 is a natural selection for designing and building thin column line array 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 NumberBMT25-4
List Price $16.99
Unit of MeasureEach
Warranty - Parts5 Years
Warranty - Labor5 Years
Product Shipping Weight (lbs.)0.25
Speaker TypeExciter
Power Handling (RMS)20 watts
Power Handling (max)--
Continuous Program Power--
Impedance4 ohms
Frequency Response

150 - 15

000 Hz

Voice Coil Diameter25 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--