909 MK5 Power Amplifier

The stereo amplifier 909 is the largest we 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; our smaller models 911 and 956 are its direct descendants. Like the legendary
pre-amplifier 808, 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 our 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 by us.
The 909 distinguishes itself by an extremly high damping factor. This together with the
ability to deliver high currents enables it to control any loudspeaker effortlessly over the
full frequency range. The 909 can easily deliver high continous load currents and, thus,
drive loudspeakers at the lowest impedance values. This renders the impulse response
practically load-independant.

Among audiophiles, the 909 is highly regarded for its warm yet detailed sound. The 909
is unsurpassed in its ability to decipher the smallest musical detail when driving the best
speakers in the world, keeping the ability for extreme bass control even at the highest
volume levels. ‘The burmesters performed an amazing ‘disappearing’ act in Larry Alan
Kays system, leaving behind the most natural impression of music-making he has observed’.
(Fi-magazine, San Francisco).

TECHNICAL DATA

Dimensions (WxHxD) 485 mm x 515 mm x 485 mm (19 inch x 20.3 inch x 19 inch)
Weight app. 80kg (170 lbs.)
Power output Stereo: 2 x 600 W (4 Ω), 2 x 1.250 W (1 Ω)
(at appropriate AC input) Mono: >1x 1.930 W (4 Ω), >1x 3.200 W (1 Ω)
Continous peak current 65 A
Damping factor >1000
Noise suppression >81 dB
Input sensitivity 730 mV for full gain320 mV for 100 W into 4 Ω load
Frequency response 0-200 kHz (-3dB)
20 selected power transistors per channel
Rise time (stereo/mono) 1,4 μs into 4/8 Ω load
1,9 μs into 1 Ω load
Over-dimensioned power supply with 160.000 μF filtering and a 3,5 kW torodial transformer.

SPECIAL FEATURES

• Bridgeable for mono operation by external mono-adapters. May also be ordered in
internal mono configuration from the factory
• Completely balanced signal path design like all Burmester components
• Input stages in Burmester Class A X-amp design
• DC-coupled signal path without distorting capacitors
• Generously dimensioned power supply for high current output
• Effortless control of any loudspeaker through a high damping factor over the full frequency
range, even at highest volume levels
• Stable operation into all loads
• Remote on/off feature when used with Burmester power pre-amps
• Processor-controlled error diagnosis

INPUTS AND OUTPUTS

• Balanced inputs (stereo/mono)
• Unbalanced input using supplied adapters (stereo mode only)
• 10V DC input for remote on/off switching by Burmester pre-amps
• Loudspeaker output terminals (stereo/mono)

APPEARANCE

Standard version with chrome bracket, engraved gold triangle, housing and heatsinks
black or silver annodized. Custom design upon request.