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Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm

Brand:|Model: ND65-8|Part # 290-206
Dayton Audio's compact ND65-8 aluminum cone driver demonstrates the latest advances in high-excursion design processes.
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List Price$25.99
Regular Price$19.30
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Part # 290-206
  • Rubber-edged aluminum alloy cone
  • Large excursion capability
  • Self-shielded Neo-Balanced motor structure
  • 4-layer underhung voice coil with polyimide former
  • High power handling

Product Details

Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm

Dayton Audio's compact ND65-8 aluminum cone driver demonstrates 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 speaker applications, or combined in multiples and line arrays.

Product Specifications
  • Nominal Diameter2-1/2"
  • Power Handling (RMS)15 Watts
  • Power Handling (max)30 Watts
  • Impedance8 ohms
  • Frequency Response80 to 20,000 Hz
  • Sensitivity80.8 dB 2.83V/1m
  • Voice Coil Diameter0.75"
Thiele-Small Parameters
  • Resonant Frequency (Fs)77.4 Hz
  • DC Resistance (Re)7.4 ohms
  • Voice Coil Inductance (Le)1.04 mH
  • Mechanical Q (Qms)4.01
  • Electromagnetic Q (Qes)0.46
  • Total Q (Qts)0.41
  • Compliance Equivalent Volume (Vas)0.02 ft.³
  • Mechanical Compliance of Suspension (Cms)1.68 mm/N
  • BL Product (BL)4.47 Tm
  • Diaphragm Mass Inc. Airload (Mms)2.5g
  • Maximum Linear Excursion (Xmax)3.5 mm
  • Surface Area of Cone (Sd)15.6 cm²
Materials of Construction
  • Cone MaterialAluminum
  • Surround MaterialRubber
  • Voice Coil FormerKapton® / Polyimide
  • Magnet MaterialNeodymium
Mounting Information
  • Overall Outside Diameter2.5"
  • Baffle Cutout Diameter2.05"
  • Depth2"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.02 ft.³
  • Sealed F3111 Hz
  • Vented Volume0.05 ft.³
  • Vented F355 Hz
Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm
  • BrandDayton Audio
  • ModelND65-8
  • Part Number290-206
  • UPC844632081477
  • Product CategoryMidrange / Midbass Drivers & Full-Range Speakers
  • Unit of MeasureEA
  • Product Rating
    (6 Reviews)
  • Weight0.4 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 ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm
in the Midrange / Midbass Drivers & Full-Range Speakers product category.


Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm
Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm is rated 4.3333 out of 5 by 6.
Rated 3 out of 5 by from Not a fullrange driverI'm not quite sure why PE/Dayton advertise these as a full range driver. They are not. Even on axis they are significantly (15-20 dB) down by 20 kHz. The Aurasound NS3 would be a better choice for a full range driver. As a midrange driver, the ND65 have the advantage of better dispersion if you want to cross over high.
Date published: 2015-11-17
Rated 4 out of 5 by from GoodNeed burn in, Fs of the pair I had was 20% higher than data sheet before burn in. About spot on after burn in. A few peaks in FS, but very capable driver for size. Probably best 2" driver available for price if you want extension in a small enclosure.
Date published: 2015-05-22
Rated 5 out of 5 by from Virtually perfect match.This speaker was dimentionally exactly as the originals I was replacing. A slight modification to the opening because the terminals were in a different location and they fit perfectly.
Date published: 2015-04-28
Rated 5 out of 5 by from huge bass! lot off detail.I used this driver for main speaker. 2*100w sony mosfet power amp. result is very good. no need for sub.
Date published: 2015-01-03
Rated 4 out of 5 by from Nice sound in a small packageI used two of these in a portable stereo project. The enclosure I made is 11.25x3.25x2.25 and tuned to 75Hz. Much of the interior is taken up by 8 AA batteries and a TA2024 amp and some other small circuit boards. The main reason for making it this small was that I initially wanted to use a small solar panel to charge my phone when camping and it grew into wanting some music as well. The aluminum cones have proven a good choice. I've gotten as much as 6 hours at near max volume, not while charging my phone.The sound quality is pretty good considering the small box, and it gets rather loud. I've noticed it sounds much better when outside or in a large open room. Frequency response is decent, it goes down to about 110Hz before it begins to roll off and there's a dip at about 5k. I could probably make it sound even better if I invested some time into it as the drivers show some serious potential if placed in a properly designed enclosure. As it is I'm pretty happy with it since it sounds way better than a jambox and has more bass... and it charges my phone while I'm camping.
Date published: 2013-11-23
Rated 5 out of 5 by from Impressive bass responseI bought this little speaker to make a custom ipad dock. the enclosure is 10" x 10" x 2" (volume is a little less because there is a sectioned off part to house the battery). I put 3 dividers in the box to make it into a folded "Tapered Quarter Wave Tube". The folded tube has a functional length of a little less than 40", and it has a .9" dia. port 1.3" long on the big end of the tube. The speaker is located on the top of the box roughly in the middle of the length of the tube. The speaker is mounted next to the edge of the box so there is room to set my ipad on top of the box without covering the speaker. In this enclosure (using a 10w dayton amp and a 12v Bosch lithium Ion battery) the bass that this speaker produces is SHOCKING. the overall sound is very pleasing, though maybe lacking some clarity in the upper frequencies....but for just one 2" driver....amazing. I'm not sure how it would sound in other enclosures, but for my design it really delivers. I bought several other 2" drivers, and they had nowhere near the bass response in my enclosure (note: this speaker is really more comparable in size to other 2" speakers though it is listed as a 2.5" speaker). I also got a 2.5" peerless (slightly larger dia. speaker), which performed pretty well (a bit more volume and clarity in the mids), but it sounded more like you'd expect a small speaker to sound, it lacked the impressive low end response and smoothness of the Dayton. I highly recommend this speaker for those looking for a lot of punch in a small package.
Date published: 2012-10-04
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Product Q&A

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Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm

Hi I was thinking of using 4 of these to build a very low profile center speaker for my home cinema. From testing with another larger speaker I like it high passed at 80hz. Can you recommend cabinet and vent size. Can you recommend a tweeter to match?

Asked by: Flexis
I would recommend 0.25 cubic feet for all four with two 1" diameter, 4" long ports for a tuning frequency of 60 Hz. We have many tweeter options that will work here, basically any of our small neo types. The Dayton below is one of the most popular.
Answered by: MattP
Date published: 2015-10-19

Hi, Just checked the Dayton Audio site and it appears the specs for this driver have changed compared to the specs you have listed, which specs are correct? i.e. Qts is now .41 instead of .62 , thanks.

Asked by: squidy
We are currently updating specs for Dayton products. The Dayton Audio site will have the most up to date specs available.
Answered by: MattP
Date published: 2015-06-01

I would like to use two of these in a portable speaker, external 12"x3.5"x3.5" using 1/4" MDF I realize this is less than ideal but what would the possible low end extension be or is there a better driver for this? also would a PEQ(via DSP) help?

Asked by: LLL3
In that kind of volume you will only reach so low. These drivers would probably be the best suited due to their relatively low Fs and long excursion. With a 1" diameter port that is 4" long (probably mounted to the side) you can expect a bit of a natural bass boost around 70-80 Hz and a tuning frequency of 90 Hz.
Answered by: MattP
Date published: 2015-06-01

I am looking for a very small speaker to use as rear fill in my truck, which had 5.1 surround. This will be limited from 300hz- 5000hz. Do you think this will work?

Asked by: Jake528
These will work but will still have limited output due to their low SPL. If you have room for a larger driver, the ND90 or ND91's would be just as good in that range but offer more output, or even better would be something like the FaitalPRO's below.
Answered by: MattP
Date published: 2015-05-05

What would be a good tuning frequency for two of these drivers in a box 3" x 3" x 8"? And also what port diameter and length would be needed? The dimensions are inside dimensions.

Asked by: crash831
A higher than optimal tuning frequency is only possible in this enclosure unless you use an external port. A 1" diameter, 6" long port (down or up firing) will tune the enclosure to about 90 Hz and not allow for much extension below that. You could use two of the 3-1/2" Peerless Passive radiators to drop the tuning to about 70 Hz, but that is about as low as you will be able to go in that volume.
Answered by: MattP
Date published: 2015-04-30

I'm thinking of using 20 of the ND65-8 in a vented cabinet with a volume of 0.78 ft3.  I want to tune to an F3 of 70 Hz and use three 1.75” ports.  What length should the port tubes be?

Asked by: mikebrand
In order to get an F3 that high you would have to tune it to 91 Hz with the ports only 1" long each. I would recommend a lower tune and F3 using 3" long ports. These ports will tune to 72 Hz and have an F3 of 61 Hz.
Answered by: MattP
Date published: 2015-03-19
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