QSC E112 Series System 
2x E112's and a GXD8 Power Amplifier
E112
12" Two-Way Passive Loudspeaker (Black)
The E112 is a trapezoidal, two-way loudspeaker using a 12-inch die cast aluminum woofer with a 3-inch voice-coil. The 15mm, 11-ply enclosure provides enough volume to deliver solid low-frequency extension down to 65 Hz making it an excellent choice for applications in which space or budget preclude the use of a subwoofer. The DMT coverage angle of 85° is ideal for most medium and medium-long throw applications.
E Series loudspeakers will perform very well with any quality, professional power amplifier - but by taking advantage of the complete E Series Entertainment System, more performance and options are available. Today's powered loudspeakers rely on finely tuned digital signal processing (DSP) to achieve a higher level of performance. When used with QSC GXD or PLD amplifiers or with a QSC TouchMix digital mixer, E Series loudspeakers can also take advantage of advanced DSP. QSC has developed E Series DSP settings for all three platforms. These settings support a variety of applications including live sound reinforcement (with and without subwoofers), stage monitoring, dance music and karaoke.
GXD8
Professional 4500 Watt Peak 2-Channel Power Amplifier with DSP
The GXD8 from QSC is a professional power amplifier designed for professional PA systems utilizing speakers with 4 and 8 ohm loads and a maximum output of 4500W. The GXD8 employs a class D output stage with a universal power supply for high performance and efficiency, while keeping the unit lightweight at 13.2 lbs. The integrated DSP section includes High and Low-Pass filters (24 dB LR), 4-band parametric equalizer, signal alignment delay, and RMS/Peak speaker protection limiting.The parallel XLR and 1/4" TRS input connectors offer broad compatibility with convenient loop-through capabilities, while the professional binding posts and NL4 connector provide mono and bi-amped speaker connections. In addition to the limiting offers on the inputs and outputs, the GDX employs smart speaker protection by providing settings for the loudspeaker's continuous output and impedance (4 ohm or 8 ohm). The GXD8 ships with a standard IEC power cord.