Avid Eleven Rack with Annual Subscription Includes Pro Tools First Eleven Rack is the ultimate recording interface and multi-effects box for guitarists Recording, re-amping, and amazing live effects Powerful onboard DSP gives you the amazing sound of Avid's Eleven plug-in, without taxing your CPU or adding the least bit of latency Experience lifelike tube amp response, thanks to Eleven Rack's True-Z impedance-matching technology