Dayton Audio's DMA105-8 4" high performance full-range driver combines a
rigid aluminum cone, powerful dual magnet neodymium motor, and a proprietary
open frame to create a state of the art speaker that delivers low distortion,
natural response, and amazing high frequency capability. Make Dayton Audio's DMA
series drivers and passive radiators the first choice for your next smart
speaker, portable Bluetooth speaker, or even high output line array
design.
Key Features
Excellent high frequency response for true full-range applications
Dual neodymium motor to create a symmetrical magnetic field for superb
control
Large copper cap lowers distortion while improving high frequency
response
Vented aluminum voice coil former with exceptional heat dissipation for
high power handling
Exclusive 12-spoke open frame design provides extensive venting and minimal
reflection
DIY friendly, oversized mounting flange makes installation simple
Matching tunable passive radiators also available!
Providing high efficiency with low distortion, Dayton Audio's DMA105-8 4"
aluminum cone full-range is an ideal driver for use in many of today's modern
speaker designs. Whether you are designing a portable Bluetooth speaker, sound
bar, compact desktop speaker, or even a high output line array the DMA105-8 is
the perfect full-range for the job.
Designed for the highest performance while delivering maximum value, the no
compromise design of the DMA105-8 produces true full-range output capability
with minimal distortion. The motor uses dual neodymium magnets creating a strong
and symmetrical magnetic field providing high efficiency with excellent cone
control. The magnet assembly also includes a large copper cap and sleeve to
lower inductance and distortion resulting in improved high frequency response.
The 2-layer 1" voice coil is wound on a vented aluminum former providing
excellent heat dissipation for high power handling and low power compression. A
rubber surround and large spider keeps the lightweight aluminum cone linear with
superb mechanical damping. In addition, the aluminum dust cap is attached
directly to the voice coil former to improve high frequency response with
terrific off axis performance. Holding everything together is a proprietary
12-spoke frame with an extremely open design that has extensive venting under
the spider and ample room for high excursion.
Furthermore, Dayton Audio designed the frame for all the DMA Series with
DIY speaker builders in mind. The oversized mounting flange means that no
precision cutouts are necessary. To ensure an easy installation, the terminals
are oriented in such a way that no odd cutouts or notches are needed for
connector or wire clearance. Finally, the corners have a 1/8" radius, meaning
that for flush mounting you can get a perfect fit using any standard 1/4"
straight cut router bit.
Product Specifications
Nominal Diameter 4"
Bolt Circle Diameter 5
Moving Mass Of Diaphragm (Mmd) 4.9
Power Handling (RMS) 35 Watts
Power Handling (MAX) 70 Watts
Impedance 8Ω
Frequency Response 70 to 20,000Hz
Sensitivity 84.8dB 2.83V/1m
Voice Coil Diameter 1"
Thiele-Small Parameters
Resonant Frequency (Fs) 72Hz
DC Resistance (Re) 7.5Ω
Voice Coil Inductance (Le) 0.6mH
Mechanical Q (Qms) 2.64
Electromagnetic Q (Qes) 0.83
Total Q (Qts) 0.63
Compliance Equivalent Volume (Vas) 0.15ft³
Mechanical Compliance of Suspension (Cms) 1mm/N
BL Product (BL) 4.47T·m
Maximum Linear Excursion (Xmax) 2.5mm
Surface Area of Cone (Sd) 54.1cm²
Materials of Construction
Cone Material Aluminum
Surround Material Rubber
Voice Coil Wire Material Copper
Voice Coil Former Aluminum
Basket / Frame Material Polymer
Magnet Material Neodymium
Mounting Information
Overall Outside Diameter 4.1" x 4.1"
Baffle Cutout Diameter 3.77"
Depth 1.86"
# Mounting Holes 4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity
suggestion)
Sealed Volume 0.167ft³
Sealed F3 97Hz
Vented Volume 0.37ft³
Vented F3 48Hz