The Bryston BP17³ is a state-of-the-art analog stereo pre-amplifier, utilizing software control which allows for numerous features and functions. The BP17³ delivers incredible sonic performance while still adhering to traditional, fully discrete, analog circuits throughout the pre-amplifier. The BP17³ includes the patented Salomie circuit found in all Cubed Series amplifiers and incorporates much of the existing architecture developed for the Bryston B135³ Integrated Amplifier and SP3 Surround Sound Processor.