Cambridge Audio 651W


Brand Cambridge Audio


The Azur 651W is a two channel power amplifier, capable of producing 100W per channel into 8 Ohms or 150W per channel into 4 Ohms and with a frequency response of 5Hz – 80kHz +-1dB. It's designed specifically to be partnered with a high quality digital preamplifier such as the Stream Magic 6.


Featuring both fully balanced XLR and unbalanced RCA analogue audio inputs, the 651W is designed to work in perfect synergy with a dedicated Cambridge Audio preamplifier. By connecting a digital preamplifier such as the Stream Magic 6, the 651W provides the powerhouse in a truly astonishing digital music system!

To find out why the 651W is so well suited to act as the heart of your system, watch the video opposite.


By separating out power amplifier functionality, our engineers were able to give this amplifier the time and dedication that it needs. It is completely free of compromise and therefore delivers the ultimate performance of focus and power.



Power output 100W per channel into 8 Ohms
150W per channel into 4 Ohms
THD (unweighted) < 0.001% 1 kHz
< 0.005% 20 Hz - 20 kHz
Frequency response 5Hz – 80kHz +-1dB
S/N ratio (ref 1W / 8 Ohm) > 90dB (unweighted)
Sensitivity 1.5V rms unbalanced
1.5 + 1.5V rms balanced
Input impedances Balanced input 38 kOhm
Unbalanced input 68 kOhm
Power amp damping factor > 125 at 1 kHz
Trigger in 5 – 12V AC or DC
Trigger out 12V DC @ 100mA
Maximum power consumption 750W
Idle power consumption (no signal) 45W
Standby power consumption < 0.5W
Colour Black or silver
Dimensions (HxWxD) 115 x 430 x 340mm (4.5 x 16.9 x 13.4”)
Weight 10.7kg (23.5lbs)
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