Tucked behind the face of this receiver you'll find a groundbreaking Class-D amplifier that delivers 40 watts RMS per channel – 100 watts of peak power – equivalent to what you'll find in many external car amplifiers. Subwoofer Direct Connection lets you combine the output of the receiver's 2 rear channels to drive a small subwoofer. Sony complements this beefy output with a sophisticated suite of sound shapers, including frequency filters, bass enhancers, time alignment and a 10-band equalizer. Bluetooth adds the convenience of hands-free calling and audio streaming. Sony makes it easy to set up with Near Field Communication (NFC) technology. Just touch selected devices with NFC to the N-mark on the knob and you'll be ready to go. With compatible iPhones you'll enjoy Siri Eyes Free. Just press the volume key to activate voice commands for making calls, setting up reminders and other features. And don't miss a text while driving – Siri Eyes Free can read out text messages while you drive, and even let you compose responses while your hands are on the wheel. Sony's SongPal app lets you connect through Bluetooth to use voice control for finding your favorite music tracks, and to provide touch screen control from your smartphone to find sources, access apps, and even customize your sound settings. When you plug in your Android or iOS device you'll be able to rock with your favorite music tracks in a jiffy. The latest generation of smartphones can suck a lot of power, so the USB port kicks out 1.5 amps to keep your screens glowing bright. Sony's Dynamic Color Illuminator offers up to 35,000 combinations of colors in 2 different lighting zones and will even pulse in time to the beat or volume of your music. Cool details like a nifty sliding USB port cover add a touch of style.