To build the 851W to be the best toroidal transformers were essential. But rather than use one for everything we designated one for the sound amplification itself, and another for the input circuitry. This means the signal is unaffected by audio output volume, so always sounds fantastic. The primary toroidal transformer provides unrestricted power to the dual mono amplification blocks. It’s a true audiophile transformer that will operate without distortion and with no buzz, interference or hum. The second smaller toroidal transformer takes care of pre-amplification processes. View the videos below for an insight on why we use toroidal transformers.
The 851W can be used in stereo, bi-amped or bridged mono configurations. In bridged mono mode into 8 Ohms the 851W is a 500W monoblock amplifier. Into 4 Ohms, this figure increases to an incredible 800W. It can be paired with our 851E pre-amp, any of our digital pre-amps such as the 851N or CXN, or any other analogue pre-amps, and thanks to our Terrapin buffering module it will always sound perfectly matched.
CAP 5 PROTECTION
Our proprietary CAP 5 protection system protects the 851W, plus any connected equipment and speakers, ensuring ultimate reliability and peace of mind.
POWER OUTPUT – STEREO/MONO
200W per channel into 8 Ohms 350W per channel into 4 Ohms
POWER OUTPUT – BRIDGED MONO
500W 8 Ohms 800W 4 Ohms
< 0.001% 1 kHz < 0.005% 20 Hz - 20 kHz
5Hz – 80kHz
S/N RATIO (REF 1W / 8 OHN)
SENSITIVITY – STEREO OR MONO
1.5V rms unbalanced 1.5 + 1.5V rms balanced
SENSITIVITY – BRIDGED MONO
0.775V rms unbalanced 0.775V + 0.775V rms balanced
Balanced input 38 kOhm Unbalanced input 68 kOhm
POWER AMP DAMPING FACTOR
> 110 at 1 kHz
MAX. POWER CONSUMPTION
STANDBY POWER CONSUMPTION
148 x 430 x 365mm (5.8 x 16.9 x 14.4”)