• Compact neodymium motors have low stray field.
• Ferrofluid enhances power handling and helps damp resonance.
• Rear- design minimizes housing size.
• Center-to-center spacing as low as 1-1/2".
• Great top-end air and sparkle.

Quick Overview This versatile tweeter is a huge step above the average "budget" tweeter. It has the sensitivity, smoothness, and power handling to individually do a two-way with most small woofers. Product Highlights Compact neodymium motors have low stray field Ferrofluid enhances power handling and helps damp resonance Rear- design minimizes housing size Center-to-center spacing as low as 1-1/2" Great top-end air and sparkle Product Manuals / Spec Sheets / Downloads Dayton Audio ND20FB-4 Specification Sheet Dayton Audio ND20FB-4 Data Files AddThis Sharing Buttons Share to FacebookFacebook Share to TwitterTwitter Share to MoreAddThis Product Description Dont let the low price fool you! This versatile tweeter is a huge step above the average "budget" tweeter. Conceived with line array thoughts in mind, it is finally possible to achieve the inter-driver spacing needed to minimize comb filtering out to nearly 20 kHz. But its uses dont stop at line arrays-- it has the sensitivity, smoothness, and power handling to individually do a two-way with most small woofers. Or, use it in an A-pillar in your car as a great inexpensive component tweeter. Give them a try for your next budget or micro speaker-- you will be pleasantly surprised! Product Details Speaker Series ND Series Model Number ND20FB-4 List Price $18.99 Color Black Unit of Measure Each UPC 844632000881 Warranty - Parts 5 Years Warranty - Labor 5 Years Product Shipping Weight (lbs.) 0.1 Speaker Type Tweeter Nominal Diameter .75" Power Handling (RMS) 15 watts Power Handling (max) 30 watts Continuous Program Power -- Impedance 4 ohms Sensitivity 90 dB @ 1W/1m Frequency Response 3 500 - 25 Voice Coil Diameter 19 mm Magnet Weight -- DC Resistance (Re) 3.2 ohms Voice Coil Inductance (Le) 0.03 mH Resonant Frequency (Fs) 2 072 Hz Mechanical Q (Qms) 2.08 Electromagnetic Q (Qes) 3.74 Total Q (Qts) 1.33 Diaphragm Mass Inc. Airload (Mms) -- Moving Mass Of Diaphragm (Mmd) -- Mechanical Compliance of Suspension (Cms) -- Surface Area Of Cone (Sd) 2.8 cm² Volume of Displacement (Vd) -- BL Product (BL) -- Compliance Equivalent Volume (Vas) -- Maximum Linear Excursion (Xmax) -- Drivers Mechanical Losses (Rms) -- Cone / Diaphragm Material Textile Soft Dome Entry / Exit Diameter -- Surround Material -- Voice Coil Wire Material Copper Voice Coil Former Aluminum Basket/Frame Material -- Magnet Material Neodymium Overall Outside Diameter 39 mm Overall Depth 19 mm Baffle Cutout Diameter 29 mm # ing Holes 4 ing Hole Diameter -- Bolt Circle Diameter -- Product Weight -- Cone / Dome Diameter 3/4"