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Dayton Audio ND91-4 3-1/2" Aluminum Cone Full-Range Driver 4 Ohm

Brand:|Model: ND91-4|Part # 290-224

The low distortion and high excursion capabilities of the Dayton Audio ND91-4 3-1/2" full-range driver make it an ideal candidate for miniature point-source monitors, surround speakers, and line arrays.
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Part # 290-224
  • Low distortion, full-range 65 Hz to 17 kHz performance
  • Rubber-edged black anodized aluminum alloy cone
  • Large excursion capability—4.6 mm Xmax, 25 mm peak
  • Self-shielded Neo-Balanced motor structure with copper alloy shorting ring
  • 1" 4-layer underhung voice coil with polyimide former
  • 30 watts RMS power handling
  • Great for line arrays and micro monitors

Product Details

Dayton Audio ND91-4 3-1/2" Aluminum Cone Full-Range Driver 4 Ohm

Dayton Audio's ND91 aluminum cone full-range drivers are the latest addition to the acclaimed ND Series high output/low distortion neodymium transducers. By increasing the original ND90's voice coil diameter from 3/4" to 1" and adding a copper alloy shorting ring, the ND91-4 features even lower distortion and delivers better bass impact and dynamic range—with peak Xmax up to 25 mm!

This high-BL version further exploits the low distortion characteristics of the Neo-Balanced motor's optimized magnetic field, making the ND91 drivers an excellent choice for full-range point-source speaker enclosures, as well as extremely accurate, high resolution line arrays.

Product Specifications
  • Nominal Diameter3-1/2"
  • Power Handling (RMS)30 Watts
  • Power Handling (max)60 Watts
  • Impedance4 ohms
  • Frequency Response65 to 17,000 Hz
  • Sensitivity85.6 dB 2.83V/1m
  • Voice Coil Diameter1"
Thiele-Small Parameters
  • Resonant Frequency (Fs)74 Hz
  • DC Resistance (Re)4.3 ohms
  • Voice Coil Inductance (Le)0.83 mH
  • Mechanical Q (Qms)4.24
  • Electromagnetic Q (Qes)0.45
  • Total Q (Qts)0.41
  • Compliance Equivalent Volume (Vas)0.05 ft.³
  • Mechanical Compliance of Suspension (Cms)0.96 mm/N
  • BL Product (BL)4.59 Tm
  • Diaphragm Mass Inc. Airload (Mms)4.8g
  • Maximum Linear Excursion (Xmax)4.6 mm
  • Surface Area of Cone (Sd)30.4 cm²
Materials of Construction
  • Cone MaterialAluminum
  • Surround MaterialRubber
  • Voice Coil Wire MaterialAluminum
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialSteel
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter3.35"
  • Baffle Cutout Diameter3.01"
  • Depth2.22"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.01 ft.³
  • Sealed F3132 Hz
  • Vented Volume0.03 ft.³
  • Vented F373 Hz
Dayton Audio ND91-4 3-1/2" Aluminum Cone Full-Range Driver 4 Ohm
  • BrandDayton Audio
  • ModelND91-4
  • Part Number290-224
  • UPC844632090448
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (12 Reviews)
  • Weight0.7 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.

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Dayton Audio ND91-4 3-1/2" Aluminum Cone Full-Range Driver 4 Ohm


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