AVS foorumi info: First, it's important to understand that, in terms of audio performance and build quality, the AVR 591, 1611, 791, and 1911 are essentially IDENTICAL. They all use the same Audyssey processing, have the same DSP chips, same DAC's, same chassis, same amp section, and are built alongside each other in the same factory in China. The only difference is the features. If you don't need the extra features, save your money and get a lower level model.