The stereo amplifier 909 is the largest they make and it is one of the most powerful in the world. Since 1990, the 909 represents the pinnacle of power amplification in the audio domain and their smaller models 911 and 956 are its direct descendants. Like the legendary 808 Preamplifier, the 909 is of modular design. And, like all amplifiers from Burmester, the signal path of the 909 is balanced from front to back as well as DC-coupled.
Like all power amplifiers the 909 comes standard as a stereo amp. However, Burmester amps can easily be bridged into mono operation by using an external adapter supplied.