*** Sold for parts, only!!! Engineered from the bottom up for top notch performance and unmatched reliability, the Crown® CE 4000 amplifier represents the wave of the future for power amplifiers. Designed using Crown’s patented, award-winning Class I (BCA® Balanced Current Amplifier) engineering, the CE 4000 provides superior power output, increased efficiency, legendary Crown sound and extraordinary reliability. The CE 4000 not only handles but excels at 2-ohm loads. In repeated stress tests, the CE 4000 continued to perform at levels 12 dB into clip, long after the competition had shut down. Designed for the utmost in flexibility, the CE 4000 features selectable on-board high-and low-pass filter sets, so you can easily add a sub-bass system. Additional signal control is available via Crown’s optional SST (System Solution Topologies) modules, which offer a wide variety of active crossover configurations. Your choice of dual output connectors is also available: Neutrik® Speakon® plus 5-way barrier block, 5-way barrier block plus binding strip, or dual Neutrik® Speakon®.