Recent years have ushered in a new era in flat-screen displays, high-definition video, and sophisticated multi-channel audio. But there's still a vital role to be played by the dedicated audio system. This streamlined two-channel receiver lets you focus solely on your music or get high-quality sound from movies, broadcasts, and gaming. The TX-8555 is packed with proprietary Onkyo amplifier technology and housed in a sturdy, vibration-resistant chassis. Whether it's channeling your iPod, SIRIUS Satellite Radio, XM Satellite Radio, CDs, or other traditional audio sources, the TX-8555 translates your music with effortless power and finesse. It even offers Zone 2 capability, so you can simultaneously play a separate audio source in a second room. The TX-8555 also has a Phono input so you can connect a stereo turntable without adding an optional pre-amp accessory. Connectivity to your iPod or to your XM satellite radio subscription requires purchase of optional accessories. Zone 2 Pre Out Subwoofer Pre Out Phono Input Massive Power Transformer Heavy-Duty Extruded Heat Sink for Maximum Heat Dissipation Speaker A/B Drive Direct Mode Pure Audio Mode IR Input/Output Independent Treble, Bass, and Balance Control XM Ready and SIRIUS Ready - requires subscription and antenna 40 FM/AM Random Presets Preset Station Naming (Up to 8 Characters) Direct Access Tuning with 10 Key Buttons Headphone Jack Audio Mute (via Remote) 3-Mode Display Dimmer (Dim/Dark/Normal) Sleep Timer (via Remote) Battery-Free Memory Back-up Non-Resonant Feet Compatible with RI Dock for the iPod Banana Plug-Compatible Speaker Posts RI (Remote Interactive) Remote Control Dimensions (W x H x D) 17 1/8œ x 5 7/8œ x 13 3/8œ (435 x 149 x 340 mm); Weight 18.7 lbs. (8.5 kg) In the case of XM, you need to connect an XM Mini-Tunerand Home Dock (sold separately) and also subscribe to XM Satellite Radio. You can also ch