Clean-sounding, efficient, and versatile, Dayton Audio's DTA-100a packs audiophile-grade sonic performance into a package just slightly larger than pocket-sized! The DTA-100a utilizes the Tripath TK2050, a high-performance chipset that delivers 50 watts of continuous power per channel (100W total) into an 8 ohm load. The Dayton Audio DTA-100a's Class-T mini amplifier circuitry offers the audio fidelity of a Class-AB amplifier while providing the > 85% power efficiency of a Class-D design. This compact powerhouse also features a convenient front-mounted 3.5 mm stereo input for quick connection of iPods, MP3 players, and other portable audio devices. A rear-mounted RCA-type line level input is also provided for permanent connection of larger devices such as CD players. Speaker output connections are high-current banana plug receptacles spaced on 3/4" centers and compatible with standard double banana plugs (sold separately). High quality screw-on banana plugs that will accept 10 to 18 AWG wire are included. The DTA-100a also doubles as a high fidelity headphone amplifier that will drive any headphone easily, and delivers colossal sound stage from 20-20,000 Hz with a signal-to-noise ratio of 103 dB (A-weighted). The 1/4" stereo jack simplifies connection of larger home and studio style headphones. An adapter is also provided so smaller 3.5 mm personal-style headphones can be used. The amplifier comes complete with a world compatible power supply and its associated connectors. Dimensions: Faceplate dimensions: 1-29/32" H x 3-3/8" W x 5/16" D; Body dimensions: 1-3/4" H x 3-1/8" W x 4-5/8" D; Overall dimensions: 2-1/8" H x 3-3/8" W x 5-1/2" D (feet, faceplate, and volume knob included).