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

Brand:| Model: ND65-8
Dayton Audio's compact ND65-8 aluminum cone driver demonstrates the latest advances in high-excursion design processes.
  • 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
Part # 
Weight: 0.4 lbs.  
List Price$25.99
You Save26%
Your Price
Buy 10-up$15.98
Part # 290-206
Qty:  EA
Available Payment Methods

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
  • Sensitivity78.3 dB 1W/1m
  • Voice Coil Diameter0.75"
Thiele-Small Parameters
  • Resonant Frequency (Fs)80.8 Hz
  • DC Resistance (Re)7.2 ohms
  • Voice Coil Inductance (Le)0.58 mH
  • Mechanical Q (Qms)5.64
  • Electromagnetic Q (Qes)0.69
  • Total Q (Qts)0.62
  • Compliance Equivalent Volume (Vas)0.02 ft.³
  • Mechanical Compliance of Suspension (Cms)1.69 mm/N
  • BL Product (BL)3.5 Tm
  • Diaphragm Mass Inc. Airload (Mms)2.3g
  • 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
    (3 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.

Similar Products

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 4.6667 out of 5 by 3.
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
  • 2015-04-17T07:27CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_3
  • loc_en_US, sid_290-206, PRD, sort_mostRecent
  • clientName_PartsExpressInternational

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm

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

What would be the ideal enclosure size for 4 of these arrayed and tuned to 80hz using Peerless Passives 3.5inch?

Asked by: nathank
You will not be able to tune to 80 Hz using the Peerless passive, it has too much weight for this and is designed for tunings around 55 Hz. You would be farther ahead using a simple port for this. A volume of 0.15 cubic feet with a 1-1/2" diameter, 4" long port will tune the box to 80 Hz.
Answered by: MattP
Date published: 2015-03-19

Please advise how can I get a detail specification sheet and mechanical dimension drawing?  

Asked by: APLL
A detailed spec sheet can be found on the product page, or in the link below.www.parts-express.com/pedocs/brochures/290-206-dayton-audio-nd65-8-brochure.pdf
Answered by: MattP
Date published: 2014-07-15

What would the enclosure volume need to be if I used one of these with one Peerless 830878 3-1/2" Passive Radiator? What F3 could I expect?

Asked by: markSLC
These would require a 0.05 cubic foot enclosure using those passives. With no weight added you can expect an F3 of 78 Hz.
Answered by: MattP
Date published: 2014-04-25

Can you tell me the diameter on the outside of the surround?   I'm planning a custom project to mount these from the backside, and I'm working with a fixed opening diameter...

Asked by: Mxseven
The diameter of the outside of the surround is 52mm.
Answered by: MattP
Date published: 2014-04-25

Are there covers avaliable for these speakers? ND65-8

Asked by: rockpro1
Unfortunately we do not have any covers or grills available for these drivers.
Answered by: MattP
Date published: 2014-04-25
  • 2015-04-17T10:21CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_12
  • loc_en_US, sid_290-206, PRD, sort_recentQuestionsFirst
  • clientName_PartsExpressInternational

Customer Projects

Customer projects that include: Dayton Audio ND65-8 2-1/2" Aluminum Cone Full-Range Driver 8 Ohm

If you built a project using this product, post it in the Parts Express Project Gallery.

Customer Discussions

If you would like to start a discussion about this product, post a thread in the TechTalk Customer Forum.
Get Deals
emailed to you every week.

Be the first to hear about new and exciting products,special pricing and incredible deals!

See This Week's "GET DEALS" Email
Parts Express
725 Pleasant Valley Dr.Springboro,OH 45066USA

© 1996-2015 Parts Express, All Rights Reserved

Live Chat Software