Cambridge Audio Azur 851W
Stereo power amplifier (Black)
Item #: 779851WB
Your price: $2,499.99 Earn up to 2,500 Rewards points
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Item #: 779851WB
Your price: $2,499.99 Earn up to 2,500 Rewards points
Pure power. When it comes to music, it's about more than sheer brute force. A power amp should take great care in delivering music to your speakers. That's the strength of the Cambridge Audio Azur 851W. Sure, it packs plenty of muscle with 200 watts per channel driving 8-ohm speakers. But the real magic is how it delivers that load — by preserving the purity of the signal through a sophisticated design made for audiophiles seeking sonic perfection.
The Azur 851W uses Cambridge Audio's proprietary Class XD™ power system. It combines the unimpeachable sound quality of Class A amps with the efficiency of Class AB technology. That means you get fantastic sound with minimal crossover or switching distortion from an efficient amp that doesn't run too hot. The 851W's power is generated by not one, but two toroidal transformers. One is purely dedicated to the power amp stage, while the other handles the input stage as well as the rest of the amp's circuitry. That gives this amp the dexterity to handle dramatic changes in dynamics as well as high output levels for when you want to rock the rafters.
The Azur 851W offers lots of connection options, including XLR inputs, 4 pairs of binding posts for bi-wiring speakers, and plenty of integrated control possibilities.
Cambridge Audio's innovative Terrapin amp modules forms an impedance buffer between the incoming source signal and the amplifier stage of the 851W. This ensures accurate signal transfer from preamplifier to power amp, offering optimum performance and very low distortion with a wide variety of preamps. Of course, Cambridge Audio's Azur 851E preamplifier is the ideal mate for the 851W if you're looking for matching components with integrated control features.
You'll find balanced XLR and unbalanced RCA inputs on this power amp's rear panel as well as speaker terminals for single- or bi-wired connections. There's also a switch that lets you configure multiple 851Ws for bi-amping your speakers or bridging them for use as monoblock amps pushing a whopping 500 watts per channel into 8-ohm loads. A new auto-detect feature allows this amp to turn on and off automatically by recognizing input signals. Cambridge Audio's protection circuitry guards your investment against overheating, short circuits, and clipping.
I have this amplifier hooked up to a hotel rc 1590 ( i needed two pre out's and two sub out's ) with a pair or Martin Logan 60x and the sound is absolutely clean, practically no distortion at high volume and it makes the speakers open at a low volume. The finishing of the product is outstanding. I highly recommend this product to whoever who's into great sound and performance, worth every penny.
The Cambridge 851W to me is a great amplifier, punchy , with guts, and will beat any other amplifier costing twice or three time as much. Don't take my word for it, please go and purchase one from the guys at Crutchfield, if you don't like it you could returned and they give you your money back.
Wow! Wow! Wow! This amp brings it all to life! I WILL be adding a second!
Pros: The clarity is amazing! The power is awesome!
|Number of Channels||2|
|Power Output per Channel (8 ohms)||200|
|Power Output per Channel (6 ohms)||---|
|Power Output per Channel (4 ohms)||350|
|Bridged Power per Channel||500 watts|
|Parts Warranty||3 Years|
|Labor Warranty||3 Years|
|Inputs & Outputs|
|Number of Inputs||2|
Class XD Amplification: Cambridge Audio's proprietary XD amplification system switches dynamically between Class A and AB systems. Class A amplification delivers the purest possible sound, using only one transistor to conduct, but can be energy inefficient. Class AB involves both transistors conducting simultaneously, but makes it impossible to maintain a balance of low crossover distortion and power efficiency. Cambridge Audio's Class XD system operates in both Class A and Class AB mode, dynamically moving the crossover point depending on the audio output volume. Cambridge Audio's Class XD amplification with 12 output transistors per channel combines the near zero crossover distortion of pure Class A with improved efficiency of Class AB at higher volumes, without any compromises in performance.
Stereo & BridgeD Modes: The Cambridge Audio Azur 851W delivers a massive 200 watts x 2 channel into 8 ohms (or 350 watt x 2 channel into 4 ohms) in stereo configuration, but can also be run in bridged mono mode to output 500W x 1 channel into 8 ohms (or 800 watts x 1 channel into 4 ohms). There is a switch on the back of the amp which selects between Stereo or Bridged (mono) mode.
Dual Toroidal Transformers: Separate, high-end transformers for the power amplifier and input and other circuitry ensure audio performance is unaffected by the dramatic current output swings required to drive demanding speakers, by keeping power supplies entirely separate.
Terrapin Impedance Buffering Modules: Cambridge Audio's proprietary modules replace the op-amps commonly found in similar amplifiers. At the critical low level gain stages, these offer far improved stereo separation and imaging.
Balanced & Unbalanced Analog Inputs/Outputs: The Cambridge Audio 851W power amplifier is fitted with both balanced (XLR) and unbalanced (RCA) analog audio inputs to make connection to Cambridge Audio's 851E preamplifier (779851EB, sold separately) or other manufactures preamp (sold separately). XLR is a higher-quality input that can reject noise and interference from equipment with balanced outputs. Both the unbalanced and balanced inputs have loop outputs that can be used with the 851W's Bi-Amp Mono and Bridged-Mono modes to allow two or more 851Ws to be used in a very high-quality audio system.
Note: Only one type of input (balanced or unbalanced) can be used. There is a switch on the back panel of the amp which selects between the balanced or unbalanced inputs.
Binding Post Speaker Outputs: The Cambridge Audio Azur 851W power amplifier is equipped with two sets of gold-plated, binding-post speaker terminals. The speaker terminals can be used in a Normal Stereo, Bi-wire Stereo, Bi-amp Mono, or Bridged Mono configuration. The binding-post terminals will accept bare wire (up to 10AWG), pin-connects, and banana plugs (dual or single). Only connect speakers with a nominal impedance of 4- to 8-ohm.
All-Metal Chassis: The Cambridge Audio 851W power amp features an acoustically damped full-metal chassis with thick brushed aluminum front-panel.
5-Way Protection System: The 851W benefits from the latest version of Cambridge Audio's sophisticated proprietary protection system. CAP5 (Cambridge Audio Protection 5-way) is an innovative and intelligent circuit that constantly monitors the amplifier, without degrading signal purity, ensuring ultimate reliability. Designed to protect the amp in operation, the system has been developed to leave sound quality unaffected. It incorporates a clipping sensor that reduces the volume to keep levels in a safe range, short-circuit detection, and current and voltage overload detection plus a solid-state temperature sensor for over-heat cut out. Combined, these technologies ensure that Cambridge Audio amplifiers will go on to deliver years of reliable, high-performance sound.
IR Input/Control Bus: The 851W also features a IR Emitter input (3.5mm) which allows modulated IR commands from multi-room systems or IR repeater system to be received by the amplifier. In addition, the 851W features a Control Bus Input and Output (RCA), which allows un-modulated commands from multi-room systems or other components to be received by the amp and loop out to another unit.
Trigger Input/Output: For custom install use or with preamps and with trigger outputs, the 851W can be turned on and off (i.e. brought in and out of Standby mode) by the presence of 5-12V DC at the Trigger input (3.5mm). A trigger input will also produce an internally generated 12V DC trigger output at the Output/Thru connection (3.5mm). Turning the 851W on from the front panel also produces a 12V DC trigger output at the Output/Thru connection. This can be used to turn on/Standby other connected power amplifiers or other equipment if desired
Smart Auto-Standby: Smart Auto-Standby mode (<0.5W) detects incoming audio signals to simplify integration with Cambridge Audio preamplifiers.