The DRX-7.1 amplifies accurate, noise-free signal processing with high-current power for dynamic speaker control. The result is pure, rich and authentic sound. Integra's dynamic audio amplification delivers 140 Watts per channel with 40 amps of high instantaneous current capability. The DRX-7.1 is certified select by THX. In order to satisfy THX parameters, 40-60 hours of testing over 2000 data points for AV Receivers to ensure that the DRX-7.1 is capable of meeting rigorous audio and video performance standards, resulting in reference level, distortion free playback. This goes on to include THX Loudness plus technology, to bring out intricate details at lower listening levels.