SD4AA35SM classroom sound system includes one Atlas Sound AA35, one AKG WMS40ProSS, and one SD4 Super Dispersion Ceiling Speaker. Amplifier – Atlas Sound AA35 35-Watts Mixer Amplifier, 3-Channels, 2-Stereo-Line Inputs, Dual Line Outputs, Remote and VOX-Mute-Capabilities, Route any Source Combination laptop, PC, Projector Sound, DVD, CD or Cassette or Entire Mix Bus to Zone 2 MOH Out, 1-Mic-In with Phantom Power. SD4 speakeris great for Schools, Military and Corporate Training applications. 360 Degrees of Omni Directional Coverage engineered for voice, paging, and music applications. The SD Speaker employs 4 smaller 6.5 very fast transient response aluminum-woofer drivers that are very powerful and stable. Working in unison these drivers produce clean powerful dynamic sound. When designing the SD the goal was to have the single most import feature at the forefront, good transient response dynamic contrast. A transient is a sound of short duration, and good transient respon (more…)