PreSonus Eris E4.5 2-Way Powered Studio Monitors (Pair)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> 4.5 inch Kevlar low frequency transducer </span></li><li><span class="a-list-item"> 1 inch (25mm) ultra low mass silk dome high frequency transducer </span></li><li><span class="a-list-item"> 50 watt Class AB amplification (25w/side) </span></li><li><span class="a-list-item"> Acoustic tuning controls for Midrange， HF， High Pass ， and Acoustic Space settings for accurate mixing contour </span></li><li><span class="a-list-item"> RF interference output current limiting， over temperature， transient， and subsonic protection </span></li><li><span class="a-list-item"> 100 dB maximum continuous SPL， 70 Hz - 20 kHz frequency response </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41mNL0VywgL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41gG3809p1L.jpg" noproxy>