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Cambridge Audio Azur 351A

Stereo integrated amp with USB input (Silver)

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  • Cambridge Audio Azur 351A

    Front (Silver)

  • Cambridge Audio Azur 351A

    Back (shown in black)

  • Cambridge Audio Azur 351A

    Shown with the Cambridge Audio Azur 351C CD player (not included)

 

Our take on the Cambridge Audio Azur 351A

by Woody Sherman
Cambridge Audio

Everything you always wanted in a stereo receiver, except the radio

An integrated amplifier is essentially a receiver without a built-in AM/FM tuner. You get power to drive your speakers, audio controls, and inputs for music source components. Connect an iPod, a computer, a network music player, or any other device that can play Internet radio, and you may find you have no need for an AM/FM radio.

The possible dream

We know the dilemma. Sometimes the ear wants more than the bank account can deliver. And you're not a person who's willing to compromise. So it's exciting to find out the wait for your dream system might be a lot shorter than you might think. Cambridge Audio's Azur 351A integrated amplifier features all the legendary build quality you'd expect from their distinguished nameplate, and plenty of clean, reliable power for the most demanding music — thanks to the heavyweight toroidal transformer found inside its chassis.

The Cambridge Audio Azur 351A integrated amplifier's toroidal transformer

The Cambridge Audio Azur 351A's toroidal transformer is the reason you'll have plenty of clean power for your music

Everything you need and nothing you don't

Because Cambridge Audio is dedicated to giving you exactly what you need for rich, full-bandwidth musical reproduction, your hard-earned resources go exclusively toward circuitry, materials and electrical components that further the quality of your sound, and nothing more. If you're looking for a unit that will wake you with an alarm, trigger your lawn sprinkler system, or turn off with a clap, look elsewhere.

A strategy for every source

All your popular music sources will have a home. The 351A offers 6 gold-plated analog inputs (1 is a minijack on the front for media players like an iPod® or smartphone) and 1 USB input, which feeds an internal Burr-Brown DAC, allowing you to access your computer's audio files without using its noise-prone audio card. If you enjoy using iTunes® playlists or Spotify® streaming for your life's soundscape, the 351A has got you covered. And should you wish to add a turntable to your source mix, simply add a phono preamp in line ahead of one of the RCA inputs.

For a match made in audio heaven, check out Cambridge's Azur 351C CD player.

Attention to fine detail

Even something as seemingly simple as the unit's volume control has been thought through to maximize overall quality. The ALPS black-box film volume control achieves remarkable channel balance, even at very low volumes — that's a common area of dissatisfaction with less worthy components. Two sets of binding post speaker terminals will allow you to route the amp's output to speakers in two different locations, so you can enjoy your tunes throughout your living space.

Highlights:

  • 45 watts x 2 channels into 8 ohms (20-20,000 Hz), 0.15% THD at 80% of rated power
  • signal-to-noise ratio: >92 dB
  • toroidal power transformer for low noise and high-current output
  • separate transformer taps for left and right channels, twin rectifiers and separate PSUs for dual mono operation of the left and right power amps
  • 5 RCA line-level analog audio inputs accommodate CD players, tuners, other components
  • front-panel minijack input for connecting a portable music player
  • 1 stereo RCA record output
  • connect a turntable with a phono preamp
  • USB input accepts 16-bit, 32/44.1/48kHz signals, no drivers needed for Mac® or Windows® computers
  • infrared control input and control bus input/output for integration into multi-room systems
  • full-size headphone jack
  • remote control
  • 16-15/16"W x 3-7/16"H x 14-5/8"D
  • weight: 13.2 lbs.
  • warranty: 3 years
  • Our 60-day money-back guarantee
 

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
General
Watts RMS per Channel (8-ohms)
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45
Watts RMS per Channel (6-ohms)
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---
Watts RMS per Channel (4-ohms)
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---
Frequency Bandwidth
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20-20k
THD
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0.15%
Minimum Impedance
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4 ohms
Signal to Noise Ratio
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92
Number of Inputs
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5
Phono Inputs
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No
Preamp Outputs
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No
Width (inches)
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16-15/16
Height (inches)
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3-7/16
Depth (inches)
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14-5/8
Weight (pounds)
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13.2
Parts Warranty
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3 Years
Labor Warranty
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3 Years
Product Research
What's in the box?

Download owner's manual

  • Integrated amplifier
  • 6' AC power cord
  • IR remote control (RC-351A/C)
  • 3 "AAA" batteries
  • Quick Start Guide (En/Fr/Sp)
  • Important Safety Instructions

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features
Controls
Connections
Add-On Devices

Features

Full Metal Chassis: The 351 A integrated amplifier features an acoustically damped, low resonance full-metal chassis with a thick, brushed aluminum front-panel.

45W x 2Ch Integrated Amp: Separate very high quality integrated circuit amplifiers are used for each channel for freedom from crosstalk and best possible stereo imaging. The Cambridge Audio Azur 351 A delivers an impressive 45 watts per channel into 8 ohms, at 20-20kHz, with 0.15% THD at 80% rated power.

Torodial Transformer + Extruded Heatsink: At the heart of the 351A lies a heavyweight, audiophile-grade toroidal transformer, a premium component chosen for its ability to offer huge power reserves, excellent bass response, depth and rich musical reproduction across the volume range. The integrated amp also offers a substantial extruded heatsink for excellent heat dissipation.

Polypropylene Capacitors: New low inductance resistors and polypropylene signal capacitors are used for superior audio performance.

ALPS " Black Box" Volume Encoder: The 351 A integrated amplifier uses a high end ALPS "Black Box: volume encoder that all of the signal goes through this at all times, so this is a very key component. Benefits include perfect channel balance at all volume levels and improved and stereo separation.

Protection Circuit: The 351A has full protection against misuse and possible faults. The overload and short-circuit protection systems continuously monitor the voltage, current, and temperature of the integrated amplifier's output devices for safe operation.

Controls

Volume: Use the front-panel rotary volume control to increase or decrease the level of the sound from the outputs of the amplifier. The volume control affects the level of the loudspeaker output and the headphone output. It does not affect the record output connections.

A/B Operation: The Cambridge Audio 351 A integrated amplifier lets you play A speakers only, B speakers only, or A and B speakers together.

Direct: This control gives the audio signal a more direct path to the power amplifier stage of your amplifier, bypassing the bass and treble control circuits for the purest possible sound quality.

Bass and Treble: The 351 A integrated amplifier has independent Bass (20Hz) and Treble (20kHz) controls which can be adjusted from +/-7.5dB. The Bass and Treble controls only effect the speaker outputs; they do not effect the record outputs.

Balance: This control allows you to adjust the relative output levels of the left and right speaker channels. The Balance control only effects the speaker outputs; it does not effect the record outputs.

IR Remote Control: The 351 A is supplied with an Azur Navigator IR remote control that operates both this amplifier and Cambridge Audio Azur-series CD players. The Azur 351 AC Navigator remote control can also control the basic functions of Apple devices, such as Apple TV and Apple's iPod/iPhone/iPad when docked in a Cambridge Audio or Apple dock (sold separately). The remote operates off of three "AAA" batteries (supplied).

Connections

Analog Audio Inputs: The Cambridge Audio 351 A integrated amplifier is fitted with five pair of gold-plated analog audio inputs (RCA) to connect your external audio sources; such as your Blu-ray/DVD player, AM/FM tuner, CD/SACD player, or Network Player. The 351 A integrated amp is not equipped with digital inputs/outputs or video inputs/outputs. There is also no Phono input.

Front-Panel Aux Input: The Cambridge Audio 351 A integrated amplifier features a front-panel Auxiliary (3.5mm) input to connect your portable MP3 player or other portable audio device.

Record Outputs: The 351A integrated amplifier features a pair of gold-plated analog audio record outputs (RCA) that can be connected to a CD recorder, MiniDisc recorder, or tape recorder.

USB Port: The 351 A integrated amplifier is fitted with a rear-panel USB (type-B) full-speed 1.1 port allowing USB audio streaming from your Windows PC (XP, Vista, 7) or Mac computer (Mac OSX 10.5 or higher). The USB port supports 16-bit/32kHz, 44.1kHz, or 48kHz audio.

A-B Speaker Terminals: The Cambridge Audio 351 A integrated amplifier is equipped with two sets of gold-plated, binding-post speaker terminals (labeled A and B). The use of A and B speaker terminals allow you to hook up speakers in another room. When using two pairs of speaker, use only speakers with a minimum nominal impedance of 8 ohms.

Headphone Output: The 351 A integrated amplifier offers a front-panel 1/4" headphone output to connect a set of headphones for private listening. When headphones are connected, the output to both A/B loudspeakers is muted. Use headphones with an impedance of between 32 and 600 ohms.

AC Power Cord: The Cambridge Audio 351 A operates off of standard household AC current using the supplied detachable 6' AC power cord.

Add-On Devices

Azur Series CD Player: The Cambridge Audio Azur 351 C Compact Disc Player (779351CS, sold separately) is the perfect companion to the 351 A integrated amplifier.

DacMagic: Get even better sound from your computer's stored music and Internet radio, as well as add optical/coaxial digital inputs to the 351 A integrated amplifier, with a Cambridge Audio DacMagic external digital-to-analog converter (779DACMPLS, sold separately).

 
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Cambridge Audio Azur 351A Reviews

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2 out of 5

Cambridge 351A

Written By Frank O, Pittsburgh Pa on Wednesday, January 08, 2014
Crutchfield Customer Review (What's this?)
 
BOUGHT THE CAMBRIDGE 651 A BACK IN MARCH 2013 SENT IT BACK BECAUSE I COULD FAINTLY HEAR MUSIC STILL PLAYING WHEN VOLUME WAS A MIN. SO I PURCHASED THE CAMBRIDGE 351A STILL HEARING THAT FAINT MUSIC PLAYING WHEN VOLUME IS AT 0 ..the built quality is nice but its sound is not clear I compaired it to my Yamaha as 500 it sound way better ..so I am gonna box it back up send it back and stick with my yamaha The cambridge does have a good punch of power wish it was cleaner sounding
Pros:
Power and punch
Cons:
Faint music still playing when volume is at 0 651 A is th The faint music still palying when volume is at 0 ..the 651a does the same thing when I tried mp3 on the front did not hear the sound at 0 Hmmm puzzles me so that is my review
2 out of 19 people found this helpful
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For a more in-depth review and enhanced detailed information on the Cambridge Audio Azur 351A, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_779351AS/Cambridge-Audio-Azur-351A-Silver.html ).

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Compare with other Cambridge Audio models

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  • Cambridge Audio Azur 351A
  • integrated amp w.USB DAC
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