The WHARFEDALE's XR3500 is a durable dual channel amplifier with heat, overcurrent, DC, ultra-quiet variable-speed fans and output short circuit safety, as well as power on/off muting. It comes with XLR thru connectors, which make wire management and daisy-chaining for installation or in flight cases a breeze. The rear panel mode switches let you choose between parallel, stereo, and bridge modes, as well as input sensitivity. Heat dissipation is aided by large front air vents and steel construction, ensuring the long life and consistent performance of any Wharfedale Pro amplifier. Meanwhile, any AC power fluctuations are handled by a massive toroidal transformer.