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.
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Part # 290-210
  • 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

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
  • Sensitivity81.4 dB 2.83V/1m
  • Voice Coil Diameter0.75"
Thiele-Small Parameters
  • Resonant Frequency (Fs)70.7 Hz
  • DC Resistance (Re)7.5 ohms
  • Voice Coil Inductance (Le)1.08 mH
  • Mechanical Q (Qms)4.71
  • Electromagnetic Q (Qes)0.75
  • Total Q (Qts)0.65
  • Compliance Equivalent Volume (Vas)0.062 ft.³
  • Mechanical Compliance of Suspension (Cms)1.22 mm/N
  • BL Product (BL)4.3 Tm
  • Diaphragm Mass Inc. Airload (Mms)4.2g
  • 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
    (24 Reviews)
  • Weight0.55 lbs.
  • 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.

View similar products to the Dayton Audio ND90-8 3-1/2" Aluminum Cone Full-Range Driver 8 Ohm
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 4.7083 out of 5 by 24.
Rated 5 out of 5 by from TrueThese little speakers sound very good as replacement mid range for 35 year old12" 3 way cabinets that I paired with the Dayton 12" Designer Series woofers.The old speakers sound better now than when they where new!
Date published: 2015-03-05
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 and Don Radick's variation using a vintage Sampsonite carry-on case 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
  • 2015-10-06T06:43CST
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Product Q&A

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

Hey Matt, quick question. If I'm planing on using these as full range speakers with a sub and crossing them over at 80hz, should I tune the enclosure to 80hz or what would you suggest? Much appreciated, have a good one. 

Asked by: Advant1224
You can tune anywhere between 60 and 80 Hz and have a similar effect on excursion performance above 80 Hz, so it will not matter much.
Answered by: MattP
Date published: 2015-03-11

In B&O CX 100 enclosures I was hoping to run two ND90-8(each ) in parallel with AMT mini 8.  If I use the Dayton XO2-2.5k will that bring the Xover frequency to 5000? Problems with this set-up?  The drivers all fit these quirky but beautiful little boxes.

Asked by: Evan L
Using this tweeter which is 8 ohms and wiring the woofers in parallel to a 4 ohm load would still be a 2.5k load. You would be better off with a XO2-4.5k as it will be better for the tweeter
Answered by: Chrisf
Date published: 2015-04-16

I dont know much about bracing but do you have any simple suggestion i could implement on my boombox?

Asked by: Jon Mckenzie
Bracing isn't an exact science, using scraps or small dowels to join the larger sides of the enclosure together is all that is required.
Answered by: MattP
Date published: 2014-12-31

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: Advant1224
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
  • 2015-10-06T09:19CST
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