Yamaha RX-A2040 9.2 Network AV Receiver (Certified Refurbished) This Certified Refurbished product is tested & certified by Yamaha to look and work like-new. The product includes all original accessories, and is backed by a 1 year warranty. The Total Purity Concept, which Yamaha has been cultivating for many years, encompasses high drive amp technology, high purity preamplification, antivibration technology and independent pure power supplies. All models have a fully discrete power amplifier that helps to minimize distortion. Every single part in an AV receiver affects the sound quality. For AVENTAGE models, extra time is taken to find (or develop) the exact parts needed to achieve the highest performance possible. Sound technicians go through a testing process to, in effect, "tune" the receiver's sound. The AntiResonance Technology Wedge (A.R.T. Wedge) is a fifth foot in the center of the unit. It dampens vibrations from the power transformer, power transistors and heatsinks, as well as vibrations that might be caused by the sound from the speakers. This AV receiver provides a variety of network functions that enable you to access more sources and also enhance operation. You can connect the receiver to a PC to enjoy Internet radio, Pandora, Rhapsody, Spotify, SiriusXM Internet Radio and operate your system via WebBrowser Control. The AV Controller App (from iTunes or Google Play) lets you control various functions from your iPod, iPhone, iPad or Android phones/tablets.