WRAT (Wide Range Amplifier Technology)is all about current. You need lots of it to stay in control when speaker impedance fluctuates, and to hang on without clipping as the soundtrack suddenly explodes into action. We use a massive high-power transformer to drive discrete, low-negative- feedback amps that cut distortion and preserve the energy of music. The TX-NR535 packs a colossal punch for movies but still retains the pure musicality you need for two-channel playback. Also, Phase-Matching Bass Enhancement optimizes low frequencies while preserving mid- range clarity. It counters phase shifting (which generally occurs in the zone occupied by vocals) by synchronizing the timing of different frequencies. The result is deep, well- defined bass that won’t blur vocals or strings.