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Dayton Audio DMA70-8 2-1/2" Dual Magnet Aluminum Cone Full-Range Driver 8 Ohm

Dayton Audio
Part #295-585

Dayton Audio DMA70-8 2-1/2" Dual Magnet Aluminum Cone Full-Range Driver 8 Ohm

Dayton Audio
Part #295-585  
Model: DMA70-8
Dayton Audio's DMA70-8 2.5" 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 8-spoke open frame design provides extensive venting and minimal reflection
  • DIY friendly, oversized mounting flange makes installation simple
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MSRP: $23.99
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Overview

Dayton Audio DMA70-8 2-1/2" Dual Magnet Aluminum Cone Full-Range Driver 8 Ohm

Providing high efficiency with low distortion, Dayton Audio's DMA70-8 2.5" 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 DMA70-8 is the perfect full-range for the job.

Designed for the highest performance while delivering maximum value, the no compromise design of the DMA70-8 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 an extensively 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 8-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 Details

BrandDayton Audio
ModelDMA70-8
Part Number295-585
UPC848791005237
Unit of MeasureEach
Weight0.35

Product Specifications

Nominal Diameter2-1/2"
Bolt Circle Diameter3.3
Power Handling (RMS)20 Watts
Power Handling (MAX)40 Watts
Impedance8Ω
Frequency Response110 to 20,000Hz
Sensitivity82.9dB 2.83V/1m
Voice Coil Diameter1"

Thiele-Small Parameters

Resonant Frequency (Fs)113.7Hz
DC Resistance (Re)7.5Ω
Voice Coil Inductance (Le)0.47mH
Mechanical Q (Qms)2.06
Electromagnetic Q (Qes)0.66
Total Q (Qts)0.5
Compliance Equivalent Volume (Vas)0.02ft³
Mechanical Compliance of Suspension (Cms)0.73mm/N
BL Product (BL)4.7T·m
Diaphragm Mass Inc. Airload (Mms)2.6g
Maximum Linear Excursion (Xmax)2mm
Surface Area of Cone (Sd)22.9cm²

Materials of Construction

Cone MaterialAluminum
Surround MaterialRubber
Voice Coil Wire MaterialCopper
Voice Coil FormerAluminum
Basket / Frame MaterialPolymer
Magnet MaterialNeodymium

Mounting Information

Overall Outside Diameter2.75" x 2.75"
Baffle Cutout Diameter2.51"
Depth1.51"
# Mounting Holes4

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.025ft³
Sealed F3183Hz
Vented Volume0.04ft³
Vented F388Hz

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