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

Unique, square-shaped from for tight driver-to-driver pl

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Dayton Audio's 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.

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 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 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).


• 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

Model Number BMT25-4
Color Black
Unit of Measure Each
UPC 848791000959
Warranty - Parts 5 Years
Warranty - Labor 5 Years
Product Shipping Weight (lbs.) 0.2500
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) 1.50
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
Driver's 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 --
SKU 848791000959
Model # BMT25-4
Barcode # 848791000959
Brand Dayton Audio
Shipping Weight 0.1130kg
Shipping Width 0.102m
Shipping Height 0.051m
Shipping Length 0.127m
Shipping Cubic 0.000655000m3
Assembled Length 0.127m
Assembled Height 0.051m
Assembled Width 0.102m

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