Quick Overview Take your product or project to the next level by turning into a speaker! The DAEX9CT-4 is the smallest of the Dayton Audio Exciters and is designed to turn small surfaces into a hidden sound source. Product Highlights Super small size; less than an inch in diameter, less than 3/8" high 4 ohms impedance for use with small, Class D amplifiers Turns almost any surface into a speaker Pre-applied 3M™ VHB™ adhesive for quick, secure installation Rare-earth neodymium motor Product Manuals / Spec Sheets / Downloads Dayton Audio DAEX9CT-4 Specification Sheet AddThis Sharing Buttons Share to FacebookFacebook Share to TwitterTwitter Share to MoreAddThis Product Description Dayton Audios 9 mm DAEX9CT-4 coin-type exciter features the same ability to turn nearly any surface into a speaker, as other exciters and tactile transducers, only in a more compact package for working with smaller surfaces. This exciters extremely small size enables audio reproduction in places never imagined: toys, monitors, cabinet doors... even windows! A neodymium magnet is employed to create maximum magnetic flux around the proprietary voice coil for increased sensitivity when compared to similar sized exciters. In turn, this reduces power requirements and makes it possible to use very small audio amplifiers, without sacrificing total output. Its 4-ohm nominal impedance facilitates the use of series and series-parallel wired arrays for a highly focused, minimum dispersion sound pattern. To ensure maximum acoustic energy transfer between the transducer and the surface to which it is attached, 3M VHB (Very High Bond) adhesive is pre-applied... just peel and stick! Two PCB solder points keep installation and wiring as compact as possible. Note: An exciters frequency response and sensitivity are completely dependent on the exciters designated surface. Thinner, smaller materials will tend to be louder and create a mid/tweeter response. Thicker, larger materials (with multiple exciters) will be slightly quieter but result in a more full-range sound. Adhesive dimensions: 10.8 mm (outside diameter), 7.7 mm (inside diameter) To understand more about exciter technology, here is a link to the Exciters Buyers Guide . Product Details Speaker Series Exciters Model Number DAEX9CT-4 List Price $2.99 Color Black Unit of Measure Each UPC 848791001031 Warranty - Parts 5 Years Warranty - Labor 5 Years Product Shipping Weight (lbs.) 0.03 Speaker Type Exciter Power Handling (RMS) 0.50 watts Power Handling (max) -- Continuous Program Power -- Impedance 4 ohms Sensitivity -- Frequency Response -- Voice Coil Diameter 9 mm Magnet Weight -- DC Resistance (Re) 3.6 ohms Voice Coil Inductance (Le) 0.02 mH @ 10 kHz Resonant Frequency (Fs) 1 200 Hz Mechanical Q (Qms) -- Electromagnetic Q (Qes) -- Total Q (Qts) 3 Diaphragm Mass Inc. Airload (Mms) 0.076 g Moving Mass Of Diaphragm (Mmd) -- Mechanical Compliance of Suspension (Cms) 0.001 mm/N Surface Area Of Cone (Sd) -- Volume of Displacement (Vd) -- BL Product (BL) 0.49 Tm Compliance Equivalent Volume (Vas) -- Maximum Linear Excursion (Xmax) -- Drivers Mechanical Losses (Rms) -- Entry / Exit Diameter -- Surround Material -- Voice Coil Wire Material -- Voice Coil Former -- Basket/Frame Material -- Magnet Material -- Overall Outside Diameter 20.9 mm dia. Overall Depth 8.5 mm Baffle Cutout Diameter -- Mounting Hole Diameter -- Bolt Circle Diameter -- Product Weight --