Dayton Audio ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm

Brand:| Model: ND90-8
Looking for a small driver that punches above its weight class? This radical high performance full-range transducer exudes an aura of superiority.
  • Direct replacement for Aura NS3
  • Rubber-edged anodized aluminum alloy cone
  • Large excursion capability—4 mm Xmax, 20 mm peak
  • Self-shielded Neo-Balanced motor structure
  • Full-range 80 Hz to 15 kHz performance
  • 3/4" 4-layer underhung voice coil with polyimide former
  • 20 watts RMS power handling
Part # 
Weight: 0.55 lbs.  
List Price$27.99
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Your Price
Buy 10-49 $18.30
Buy 50-up$13.98
Part # 290-210
Qty:  EA
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Product Details

Dayton Audio ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm

Dayton Audio's compact aluminum cone drivers demonstrate the latest advances in high-excursion design processes. An efficient, low-distortion Neo-Balanced motor is combined with a rigid yet lightweight aluminum diaphragm, yielding impressive high-impact audio reproduction. Perfect for single point-source applications, or combined in multiples and line arrays.

Product Specifications
  • Nominal Diameter3-1/2"
  • Power Handling (RMS)20 Watts
  • Power Handling (max)40 Watts
  • Impedance8 ohms
  • Frequency Response80 to 15,000 Hz
  • Sensitivity82.1 dB 1W/1m
  • Voice Coil Diameter0.75"
Thiele-Small Parameters
  • Resonant Frequency (Fs)80 Hz
  • DC Resistance (Re)7.5 ohms
  • Voice Coil Inductance (Le)0.54 mH
  • Mechanical Q (Qms)4.25
  • Electromagnetic Q (Qes)0.85
  • Total Q (Qts)0.71
  • Compliance Equivalent Volume (Vas)0.05 ft.³
  • Mechanical Compliance of Suspension (Cms)0.79 mm/N
  • BL Product (BL)4.4 Tm
  • Diaphragm Mass Inc. Airload (Mms)4.7g
  • Maximum Linear Excursion (Xmax)4 mm
  • Surface Area of Cone (Sd)31.2 cm²
Materials of Construction
  • Cone MaterialAluminum
  • Surround MaterialRubber
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialSteel
  • Magnet MaterialNeodymium
Mounting Information
  • Overall Outside Diameter4.07"
  • Baffle Cutout Diameter3.35"
  • Depth2.39"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.1 ft.³
  • Sealed F396 Hz
  • Vented Volume0.15 ft.³
  • Vented F350 Hz
Dayton Audio ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm
  • BrandDayton Audio
  • ModelND90-8
  • Part Number290-210
  • UPC844632077449
  • Product CategoryMidrange / Midbass Drivers & Full-Range Speakers
  • Unit of MeasureEA
  • Product Rating
    (23 Reviews)
  • Weight0.55 lbs.
  • Case Qty60
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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in the Midrange / Midbass Drivers & Full-Range Speakers product category.


Dayton Audio ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm
Dayton Audio ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm is rated 4.6957 out of 5 by 23.
Rated 5 out of 5 by from Are you serious?!!!!!I am currently experimenting with several different drivers to use in a new center channel speaker I want to build. This little guy is unreal! I put it in a ported enclosure and couldn't believe my ears. Don't get me wrong, it's not a subwoofer, but for its size it is surprisingly strong. Furthermore, I never knew you could get highs as clear and loud as it plays without having to have a tweeter. When they say this is a full range speaker, they mean it. Good job Dayton! I have put this same review under the ND91-8 which is capable of a little more power handling. It sounded just as good!
Date published: 2014-04-28
Rated 5 out of 5 by from Great Little SpeakersI have bought several for projects. I put these in an ammo can mp3 dock I built. Sound great even in a metal environment. I'll be purchasing more.
Date published: 2014-03-28
Rated 5 out of 5 by from The little engine that could!I used two of these in a variation of Paul Carmody's Sprite boombox. By variation I mean that I used Paul's contour filter, but the amp I used was different, and thus the box alignment was also slightly altered. Since my amp has adjustable bass boost, I went with an alignment that would provide higher output capacity/power handling in the 50-65 Hz range -- 0.165 cu ft and a tuning of 51 Hz. Because I had it on hand, I lined three of the walls (opposing) with convoluted foam mattress topper. Overall I'm very pleased with the outcome. The output and bass extension of these drivers, considering their size, is stupid crazy, and, especially with Paul's contour filter, the level of fidelity is impressive as well.
Date published: 2014-01-31
Rated 5 out of 5 by from Every bit as good as the reviews!I got inspired looking at Paul Carmody's great Sprite Boombox plans https://sites.google.com/site/undefinition/sprite and Don Radick's variation using a vintage Sampsonite carry-on case http://techtalk.parts-express.com/showthread.php?239496-Sprite-Boomcase.I used an older Sampsonite train case I found on Ebay. It's a little easier to use because the walls are flat surfaces.I'm just amazed at the sound of these little speakers. I had no idea a little speaker could pack such a wide-range punch. Thanks to Paul Carmody for the speaker calculations and the choke design and to Don for getting me started!
Date published: 2013-11-11
Rated 5 out of 5 by from Mini MTM Tower with 2 x ND90 and 1 x ND16FAMade a mini MTM with 2 of these in a 10 Liter box, tuned to around 50 hz.The sound is phenomenal, Highly recommended. also I have included about 6db of baffle correction. Which makes the speakers sound very large.The tweeter is only there to give a little extra sparkle to the very top end. and may not be required. but i like it.The bass is excellent and does not require a sub woofer unless you are planning on running them at high volume.The mid range although seems a little up and down on the frequency response chart, actually sounds very good and have not noticed any harshness at all, been listening to them for 4 days now.The efficiency is low so I'd recommend an amp capable of at least 30 -50 Watts to give some head room.
Date published: 2013-10-03
Rated 5 out of 5 by from Works wellBeing used in a small amplified system for a PC, with a small sub-woofer. Sounds better than the original drivers.
Date published: 2013-09-07

Product Q&A

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Dayton Audio ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm

what is the size of the spade terminals I should buy to go with this driver?

Asked by: BobSmith
This driver uses a 3/16" and 0.110" terminal.
Answered by: MattP
Date published: 2014-12-16

I want to use two of these speakers to make a portable speaker. I was wondering what volume or dimensions i should make the enclosure and should I separate the drivers by putting a divider in the middle? this willl be ported

Asked by: Mckenzie
I would recommend an enclosure with external dimensions of 6"H x 17"W x 8"D using 1/2" thick material. Two 1" diameter, 4" long ports will tune the enclosure to about 50 Hz. This is assuming two speakers per enclosure. You do not have to add a divider, but a brace or two can't hurt.
Answered by: MattP
Date published: 2014-12-05

Can you wire one of theses speakers directly to a amp without anything between it. But have it crossed over on the amp at 80z with a sub? Or will it sound bad at higher frequencys? 

Asked by: Jakie2727272727
These can be used full range without a problem and a high pass at 80 Hz is recommended if you have a subwoofer.
Answered by: MattP
Date published: 2014-03-10

If I used this in a full range project would I need a crossover so the speaker won't get ruined from the lower frequencys?

Asked by: Jakie2727272727
This depends on a lot of things. In the recommended enclosures, this driver will handle full RMS power down to 50 Hz without excursion problems. If this is going to be used in a home theater application, I would recommend crossing them around 80-100 Hz on the low end.
Answered by: MattP
Date published: 2014-02-24

Would this work in a full range project? what size should the enclosure be and what dimensions should I use for the port? and what freq should I tune the box for? Thanks

Asked by: Jakie2727272727
I would recommend a 0.165 cubic foot enclosure with a 1" diameter, 3" long port for a tuning frequency of 57 Hz.
Answered by: MattP
Date published: 2014-02-19

Pontiac G8 application for center dash replacement

I have a Pontiac G8 with a center dash speaker I believe is a 4ohm job, but Im concerned about dropping a 8 ohmer in there and what that would do to the system. Most of the 9 speakers are 2ohm and I just replaced the 4 door speakers with 4 ohmers. Other G8 owners have said this causes the center dash speaker to overdrive and becomes too loud because of the change. They suggest putting a 4 ohm 10W resistor on the center speaker to balance out this problem. What effect would an 8 ohmer have if I used it to replace the center 4ohm factory speaker? would I still need to use a resistor? The bass response of this speaker is a plus with the system I have and I would like to use it. any thoughts out there on this?
Asked by: Surgeont
I wouldn't worry about resistors and the such. There is a 4 ohm version of this speaker, PE 290-208.
Answered by: JDoyner
Date published: 2013-04-08

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