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Dayton Audio ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm

Brand:|Model: ND140-8|Part # 290-218
Dayton Audio's ND140-8's compact aluminum cone demonstrates the latest advances in high-excursion design processes. Its compact size and high output make it perfect for your next point-source or line array speaker project.
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List Price$39.99
Regular Price$30.65
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Part # 290-218
  • Extended-range 54 Hz to 8 kHz performance
  • Rubber-edged aluminum alloy cone
  • Large excursion capability—4 mm Xmax, 20 mm peak
  • Self-shielded Neo-Balanced motor structure
  • 1" 4-layer underhung voice coil with polyimide former
  • 40 watts RMS power handling

Product Details

Dayton Audio ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm

Dayton Audio's ND140-8 midbass driver features an efficient, low-distortion Neo-Balanced motor that 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 Diameter5-1/4"
  • Power Handling (RMS)40 Watts
  • Power Handling (max)80 Watts
  • Impedance8 ohms
  • Frequency Response54 to 8,000 Hz
  • Sensitivity84.5 dB 2.83V/1m
  • Voice Coil Diameter1"
Thiele-Small Parameters
  • Resonant Frequency (Fs)56.5 Hz
  • DC Resistance (Re)7.8 ohms
  • Voice Coil Inductance (Le)1.44 mH
  • Mechanical Q (Qms)5.01
  • Electromagnetic Q (Qes)0.79
  • Total Q (Qts)0.68
  • Compliance Equivalent Volume (Vas)0.27 ft.³
  • Mechanical Compliance of Suspension (Cms)0.76 mm/N
  • BL Product (BL)6.05 Tm
  • Diaphragm Mass Inc. Airload (Mms)10.4g
  • Maximum Linear Excursion (Xmax)4 mm
  • Surface Area of Cone (Sd)86.6 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 Diameter5.43"
  • Baffle Cutout Diameter4.72"
  • Depth2.78"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.36 ft.³
  • Sealed F375 Hz
  • Vented Volume0.84 ft.³
  • Vented F337 Hz
Dayton Audio ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm
  • BrandDayton Audio
  • ModelND140-8
  • Part Number290-218
  • UPC844632081491
  • Product CategoryMidrange / Midbass Drivers & Full-Range Speakers
  • Unit of MeasureEA
  • Product Rating
    (4 Reviews)
  • Weight0.95 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 ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm
in the Midrange / Midbass Drivers & Full-Range Speakers product category.


Dayton Audio ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm
Dayton Audio ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm is rated 4.0 out of 5 by 4.
Rated 5 out of 5 by from Great little driverThese speakers are great. I used them in the sealed Aviatrix mtm design and the have great base and midrange.
Date published: 2015-01-02
Rated 4 out of 5 by from a bit of luckThese replaced the stock drivers in some old Pinnacle bookshelf 2-ways which served as upper units in a bi-amp TV system (150Hz and up) , so I can't speak for the low end. The goal was for less distortion at high levels and to get more relative gain from the tweeter. These are low efficiency so it worked out great. Other than the flimsy cage, they seem to be well worth the price. I would say 5 stars but I have not had enough units to try or time with the ones I have.
Date published: 2014-02-20
Rated 3 out of 5 by from Dayton Audio ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 OPurchased these speakers for replacement of my stock units in my rear deck that were torn from age in my 99 BMW 740. I have the Digital Signal Processor factory system. The sound these speakers but out is good for a replacement speaker but I guess my expectations may have been to high? After the 3 day of use I noticed on certain songs when there is heavier bass notes there is a rattle like one of the speakers is damaged already on one side. My rear deck enclosure houses 4 speakers. I have not yet had the chance to go back in to check because of my busy work schedule. So I have been listening to the music at low levels on my commutes now.
Date published: 2013-09-27
Rated 4 out of 5 by from pleasantly suprisedI used two of these drivers in a sealed TMM configuration with a DC28FST tweeter crossed over at 3.5k. I did this because I wanted the ND140's to handle the vocal ranges and leave the tweeter to do what it does. The tweeters had to be attentuated slightly to match the sound level from the two ND140's but the result sounds beautiful and transparent. In my opinion, a low crossover point wastes the amazing midrange these speakers offer.I'd have rated the speakers with all 5's if they had cast frames even if the price was slightly higher. The steel frames just don't look as good as this speaker sounds and the bend slightly when you tighten them down.
Date published: 2010-08-30
  • 2016-02-12T06:21CST
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Product Q&A

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Dayton Audio ND140-8 5-1/4" Aluminum Cone Midbass Driver 8 Ohm

What happened to the 4 ohm version of this driver? I saw it on special (22) last week. Is it still available?

Asked by: YepItsMe
Yes they are still available.
Answered by: MattP
Date published: 2016-01-14

Can this speaker work as a full range driver?

Asked by: dizromo
This speaker lacks a bit of the upper octave although if listened to on axis in the near field is would likely pass off as a respectable full range.
Answered by: MattP
Date published: 2014-09-08

Used as a midrange?

would this be ok as a midrange playing from 300hz up to about 4.5k?
Asked by: princ3cmo
Better off using a full range speaker and blocking unwanted frequencies with proper capicator
Answered by: Winmichaels
Date published: 2014-09-08
  • 2016-02-12T06:57CST
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