Packing plenty of processing power in a rugged, 3U rackmount chassis, Line 6's Helix Rack is a veritable swiss-army knife for your guitar rig. This multi-effects processor is equipped with a dual-DSP HX modeling engine to give you outstanding amp and tone modeling whether you're looking for that classic British amp sound, modern heavy tones, or anything in-between. Plus, with comprehensive I/O, extensive routing capabilities, and easy outboard gear integration, the Helix Rack is ready to be the nerve center of your setup.Authentic Tone - When it comes to authentic sound and feel, Helix Rack represents the next-generation in guitar technology. The dual-DSP engine provides massive power to accurately recreate the dynamic feel of tube amplifiers, not just their sonic fingerprint.HX Cabs - The new HX Hybrid cabs represent a new approach to the speaker cabinet capture process. Not only do they provide the resolution of a 2048-point Impulse Response at lower DSP usage, they also provide a far more accurate low-end response than previously captured at 12 different distances. Helix Rack also lets you load custom impulse responses, allowing you to personalize your rig setup even further.Component Modeling - Each stage of an amp's circuit has been measured and matched back to the original, so that each model reacts and interacts just like the real thing. This level of dynamic circuit detail extends into areas like power supply ripple, individual tube sag, and control over B+ voltages. Once these elements are captured, you get classic bloom and gooey compression on some amps, and a powerful gut punch on others.Intelligent Interface - Poweful modeling interfaces traditionally have a steep learning curve in order to get the most out of them, however Helix Rack approaches things differently. The large 6.2" 800x480-pixel LCD display all but eliminates menu diving and provides the same level of control you would expect from an external editor. When it comes to creating tomes, Helix Rack is as fast as you are.Four Stereo Signal Paths - With four stereo signal paths per preset, Helix Rack allows you to design complex routing scenarios. Creating variations on 4-cable method and wet-dry-wet routing schemes is as easy as selecting a template preset, and using the onboard effects models in conjunction with the 4 freely-assignable effects loops means that the tonal possibilities are huge.The Center of Your Rig - Thanks to Helix Rack's advanced capabilities and forward-thinking design, it can easily become the nerve center for your entire guitar rig. Integrate traditional effects pedals and other hardware into your environment, creating a seamless hybrid rig that incorporates the best of what software and hardware have to offer.Flexible Audio Routing - Helix Rack has incredibly flexible routing options – use the four effects loops to connect four separate pedal chains, or split them up and use them as freely-assignable inputs and outputs. In combination with four discrete signal paths at once, send wet and dry signals that take advantage of both digital and analog I/O at the same time.Powerful Master Controller - When you need to incorporate external devices via MIDI, Helix Rack offers flexibility not seen before in a multi-effects unit. Add AES/EBU digital I/O, Wordclock sync, support for three epxression pedals, CV/Expression out, and external amp switching, and Helix Rack can be the command center for any size rig.Line 6 Helix Rack Features:Dual DSP-powered HX modeling engine with 4 discrete stereo signal paths, 45 amps, 30 cabs, 16 mids, and 70 effectsImports 3rd party 1024/2048 cab IR's (Impulse Reponses)Large 6.2" 800x480-pixel LCD displayExtensive I/O for seamless integration with your entire rig - 10 inputs, 12 outputs (including 4 FX loops), plus 8-in/8-out USB audio interface3 expression pedal inputs, expression toe switch input, CV/Expression out, external amp switching, and deep MIDI controlAES/EBU and S/PDIF digital I/O with Wordclock syncIndustry-leading 123 dB of dynamic range on the guitar input, for tremendous depth and ultra-low noiseTour-grade construction - 3RU rack enclosure with optional foot-based controller (sold separately) Line 6 Helix Rack Helix Series Rackmount Guitar Multi-FX Processor.