Quick Overview For turning larger surfaces into speakers, and more bass output, Dayton Audios DAEX25TP-4 features four extended arms. Spring-loaded speaker terminals facilitate quick electrical connection. Product Highlights Unique, four arm design for exciting a large surface Pre-applied 3M™ VHB™ adhesive for quick, secure installation Rare-earth neodymium motor and a proprietary voice coil 4 ohms impedance for use with small, Class D amplifiers 20 watt RMS power handling for high output Product Manuals / Spec Sheets / Downloads Dayton Audio DAEX25Q-4 Specification Sheet AddThis Sharing Buttons Share to FacebookFacebook Share to TwitterTwitter Share to MoreAddThis 6 Product Description Dayton Audios DAEX25Q-4 quad arm exciter is built with four arms that extend out from the main exciter body, which allows this exciter to transfer sound to a much larger surface for lower frequency response extension (more bass). 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. The 1" voice coil allows for more input power, creating rich, dynamic sound. 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 to the main body, and the four arms ... just peel and stick! Two spring-loaded terminals are built onto the main body for quick electrical connection. 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. To understand more about exciter technology, here is a link to the Exciters Buyers Guide . Product Details Speaker Series Exciters Model Number DAEX25Q-4 List Price $15.99 Color Black Unit of Measure Each UPC 848791001024 Warranty - Parts 5 Years Warranty - Labor 5 Years Product Shipping Weight (lbs.) 0.25 Speaker Type Exciter Power Handling (RMS) 20 watts Power Handling (max) -- Continuous Program Power -- Impedance 4 ohms Sensitivity -- Frequency Response -- Voice Coil Diameter 25 mm Magnet Weight -- DC Resistance (Re) 4.3 ohms Voice Coil Inductance (Le) 0.25 mH @ 1 kHz Resonant Frequency (Fs) 224 Hz Mechanical Q (Qms) -- Electromagnetic Q (Qes) -- Total Q (Qts) 0.69 Diaphragm Mass Inc. Airload (Mms) 1.75 g Moving Mass Of Diaphragm (Mmd) -- Mechanical Compliance of Suspension (Cms) 0.0003 mm/N Surface Area Of Cone (Sd) -- Volume of Displacement (Vd) -- BL Product (BL) 3.86 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 101.44 mm dia. Overall Depth 24.7 mm Baffle Cutout Diameter -- Mounting Hole Diameter -- Bolt Circle Diameter -- Product Weight --