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

Dayton Audio
Part #290-224

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

Dayton Audio
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. When teamed up with the matching ND series passive radiators this driver can produce incredible full sound from compact enclosures.
Key Features
  • 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
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MSRP: $42.99
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Overview

Dayton Audio ND91-4 3-1/2" Aluminum Cone Full-Range Neo 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 Details

BrandDayton Audio
ModelND91-4
Part Number290-224
UPC844632090448
Unit of MeasureEach
Weight0.7

Product Specifications

Nominal Diameter3-1/2"
Power Handling (RMS)30 Watts
Power Handling (MAX)60 Watts
Impedance4Ω
Frequency Response65 to 17,000Hz
Sensitivity85.6dB 2.83V/1m
Voice Coil Diameter1"

Thiele-Small Parameters

Resonant Frequency (Fs)74Hz
DC Resistance (Re)4.3Ω
Voice Coil Inductance (Le)0.83mH
Mechanical Q (Qms)4.24
Electromagnetic Q (Qes)0.45
Total Q (Qts)0.41
Compliance Equivalent Volume (Vas)0.05ft³
Mechanical Compliance of Suspension (Cms)0.96mm/N
BL Product (BL)4.59T·m
Diaphragm Mass Inc. Airload (Mms)4.8g
Maximum Linear Excursion (Xmax)4.6mm
Surface Area of Cone (Sd)30.4cm²

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

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.12ft³
Sealed F3150Hz
Vented Volume0.1ft³
Vented F360Hz

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