Build with THX Ultra-certified surround processor, the Krell Home Theater Standard amplifier ensures crystal clear digital signals.With variety of surround modes like Dolby digital surround EX, Dolby digital 5.1, etc.this Krell 7.1 channel amplifier avails you with various customizing options.The -88dB THD of this Krell surround amplifier cancels the harmonic distortion to delivers precise and accurate sound output.This Krell 7.1 channel amplifier features 94dB signal-to-noise ratio, which cancels the background noise to deliver crisp and fine sound quality.The Led display of this Krell surround amplifier allows you to make simple and easy menu operations.Connect other compatible devices with the 6 coaxial digital audio input of the Krell Home Theater Standard amplifier.