Cambridge Audio Azur 651P

Phono preamplifier (Black)

Item #: 779651PB

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11 Reviews

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651P back_panel

The Azur 651P adds excitement and life to the sound of your vinyl records.

Do justice to your vinyl collection

If you're a true vinyl fan, a high-performance phono preamplifier is a must-have to get the best performance from your music, especially if your 'table is equipped with a moving coil cartridge. MC cartridges are prized by many audiophiles for their clear, detailed response, but their delicate low-voltage audio signals require extra-precise, low-noise circuitry to reveal the best they have to offer.

The majority of today's receivers and amps lack the built-in amplification needed for a direct turntable connection, and even when it's included, the typical low-cost, low-fi circuitry sounds flat and lifeless. The Cambridge Audio Azur 651P solves that problem by delivering a robust, line-level signal infused with rich, dynamic sound — revealing layers of musical detail hidden in the grooves of your favorite vinyl recordings. Your music will come to life with new levels of energy.

The Cambridge Audio difference

Cambridge Audio has a passion for creating high-value audio gear that captures every last drop of detail and emotion from your music. The 651P has been carefully designed to offer plenty of foot-tapping performance at a price that won't break the bank. Its advanced electronics include high-quality 'Class A' amplification circuits and hand-picked components housed in an all-metal outer casing featuring a thick brushed aluminum front panel. Cambridge also gave this preamp a switchable subsonic filter to remove the unwanted and disruptive effects of excessive low-frequency energy caused by turntable rumble or record imperfections. If you're a serious vinyl lover, you owe it to yourself to discover the Cambridge Audio difference.

Praise for the Azur 651P Phono Stage from Soundstage! Access

I've auditioned somewhere between 15 and 20 phono stages, but until the Cambridge Audio Azur 651P, I hadn't heard one that could hold a candle to the phono stage of my Linn Majik-1P integrated amplifier. But the 651P is every bit the Linn's equal. It does what all good audio gear should: It gets out of the way and lets the music pour forth. It's a component any vinyl-playing audiophile will appreciate, and at $249, it's a steal. If you're looking to add vinyl capability to your system, listen to an Azur 651P. You can't do better at anywhere near its price.

— From Thom Moon's April, 2015 review in Soundstage! Access, part of the SoundStage! Network [Read the full review]

Product Highlights:

  • compatible with moving magnet and moving coil phono cartridges
  • external power supply for reduced noise and interference
  • acoustically damped full-metal chassis with thick, brushed aluminum front panel
  • discrete transistor input stages instead of I.C.s for greater dynamics and lower noise
  • single-ended 'Class A' gain stage with audiophile-grade passive RIAA equalization
  • defeatable subsonic filter to eliminate very low frequency 'rumble' due to vinyl imperfections
  • gain: 39dB(MM), 55dB(MC)
  • signal-to-noise ratio: greater then 86dB(MM), greater than 72dB(MC)
  • THD: less than 0.005%(MM), less than 0.002%(MC) (20-20,000 Hz)
  • RIAA response accuracy: ±0.3dB (20-50,000 Hz) with subsonic filter off
  • crosstalk at 20 kHz: greater than 83dB(MM), greater than 69dB(MC)
  • 8-1/2"W x 1-13/16"H x 6-3/4"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

Cambridge Audio Azur 651P Reviews

Average Customer Review:

11 reviews
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Written By doghair, Port Royal,SC on Monday, December 22, 2014

Crutchfield Customer Review (What's this?)

just the fix i needed. small and very clear. good buy

Pros: small,clear,and well priced

Cons: none

Audio Sensitivity

Written By Stan K, Guilford, CT on Monday, September 15, 2014

Crutchfield Customer Review (What's this?)

One does not realize how tone deaf or complacent we become by listening to wonderful LP's on the same equipment for many years (9). Decided that it was time for a change and called Crutchfield. I was actually looking at a lesser piece of equipment when I was skillfully directed to purchase the Azur--651P. Received the Preamp and incorporated it within my system immediately.As soon as the stylus touched the LP I new that i had a winner. Instrumental LP made me feel as though I was in the Orchestra Pit. Pure enjoyment. Nothing more need to be said.

Great pre-amp

Written By Mattheew, Charlottesville, VA on Friday, September 05, 2014

Crutchfield Customer Review (What's this?)

Works great and sounds great.

Quick setup

Written By xxxezrider, Whitehall, Pa on Friday, August 29, 2014

Crutchfield Customer Review (What's this?)

Connects a record player quic

Pros: Works good

Cons: none

Loving My Vinyls Again!

Written By ET, Jackson, NJ on Sunday, March 30, 2014

Crutchfield Customer Review (What's this?)

Works splendidly with my 35-year old Onkyo turntable, no rattle, hum, hiss, or distortion, so I'm back to enjoying my vinyls again!

Pros: Has an on/off switch.

Cons: None

great amp

Written By Chris, St. Louis, MO on Saturday, March 29, 2014

Crutchfield Customer Review (What's this?)

awesome amp, great addition to my system. and great price and fast packing and shipping from Crutchfield.

Pros: great improvement over the amp in my turntable

Cons: have yet to find a con.

Cambridge Audio Azur 651P

Written By BDUBNYC, NEW YORK on Friday, February 07, 2014

Crutchfield Customer Review (What's this?)

I purchased this product based on the many positive reviews. I recently got back into collecting and playing vinyl. I replaced a $25 pre amp that worked fine and sounded good...well that is until I hooked up this bad boy. The Azur 651P really brings the music to life. It has a great soundstage. It really feels like I am listening to my vinyls for the first time. There are sounds that I never heard before on some of the records. Of course the quality of your turntable, speakers and amplifier will also affect the sonic output. Great product if you are looking to get the most out of your music.

Pros: great soundstage and music detail compact size

Cons: none


Written By Dave, West Virginia on Saturday, December 28, 2013

Just upgraded from the 551p, and I must say this is definitely a step up. Not a night and day difference, but the 651 has a wider sound stage, more detail, and a smoother more refined output.

Pros: Smooth balanced sound

Cons: No adjustments for cartridge loading etc

Vinyl Heaven

Written By Richard, Gloucester, MA on Wednesday, November 20, 2013

Crutchfield Customer Review (What's this?)

Have extensive collection of vinyl 33 1/3 rpm records that been unable to listen to for years due to having a digital receiver. Went on line search analog to digital. Went to Crutchfield website and Voila! Read reviews and ordered. Received unit quickly, excellent condition. Easy connect all as advertised. Problem. Called "Advisor" who was exceedingly patent walking me through the steps. Last question he asked: Did you turn it on? Gee, no I hadn't ! I would highly recommend this product to anyone........ just remember to turn it on!

Azur 651P

Written By Jeff M, Madison, WI on Monday, March 11, 2013

Crutchfield Customer Review (What's this?)

So far the 651p has worked out really well. The sound has been excellent, no rumbling. I'd recommend this product to anyone. The reason I didn't score a five is simply I haven't had the Pre amp long enough to give it the highest score. Don't let that discourage you. Also the set was easy especially after my conversation with the technical advisor.

Pros: Easy to set up if you know the cartridge type.( MC or MM)

Cons: None

Phono pre

Written By Paul B., Rockford Il on Friday, March 08, 2013

Crutchfield Customer Review (What's this?)

Really nice. I own a Project Phono Pre as well, it's nice too, but the flexibility of this is outstanding. Both MM & MC capability and the low "rumble " filter works great without effecting the good low end that you want to hear. Even a simple thing like having an on/off switch on the front is great. You may think its a little pricy, but it's really a small investment to your over all sound!

Pros: Filter On/Off button Outstanding sound

Cons: None

Hands-on research

What's in the box?

Download owner's manual

  • MM/MC phono pre-amplifier
  • AC power supply (with attached 6' DC cord)
  • Quick Start Guide
  • Important Safety Instructions
  • Caution note

Product Research


Overview: The Cambridge Audio 651P phono pre-amplifier has been designed to complement a wide range of MM (moving magnet) and MC (moving coil) turntables. This high-quality pre-amplifier contains the amplification and electronic circuitry required to enable you to connect your MM or MC turntable to your stereo amplifier or home theater receiver. Some amplifiers are already able to support turntable connections, but these built-in phono pre-amplifiers are out-performed by the Cambridge Audio 651P. Connected using a stereo audio interconnect cable, the 651P is set-up in minutes allowing you to appreciate stunning clarity, musicality, and resolution from all your vinyl recordings.

All Metal Chassis: The Cambridge Audio 651P phono pre-amplifier features an acoustically damped full metal chassis with a thick brushed aluminum front-panel.

MM (Moving Magnet) & MC (Moving Coil) Compatible: The Cambridge Audio 651P is MM (Moving Magnet) & MC (Moving Coil) Compatible. The 651P phono pre-amplifier is fitted with a set of stereo RCA inputs to connect your MM (moving magnet) turntable, and a set of stereo RCA inputs to connect your MC (moving coil) turntable. There is a MM/MC switch on the rear-panel to select which type of turntable you have.

Class A Amplification: The 651P phono pre-amplifier utilizes a single-ended "Class A" gain stage with audiophile passive RIAA equalization and multi-parallel capacitors to achieve exceptional RIAA accuracy of only 0.3dB, up to 50kHz.

Discrete Transistors: The Cambridge Audio phono pre-amplifier uses discrete transistors for the input stages, instead of the more common integrated circuits which can cause interference and distortion.

Audio Output: The Cambridge Audio 651P is fitted with a set of stereo RCA outputs to connect your turntable and the pre-amplifier to the line-level inputs on your home receiver. Do not connect the 651P to a "Phono Input" on a receiver or amplifier.

Ground Terminal: The 651P has a turntable ground, in case your turntable has a separate ground lead. This provides shielding to the tone-arm and the sensitive circuitry in the turntable.

Subsonic Filter: The 651P features a subsonic filter to remove the unwanted and disruptive effects "rumble" of low-frequency energy caused by vinyl imperfections.

Power Switch: The Cambridge Audio 651P features a front-panel power switch to turn the unit On/Off; this allow energy consumption to be zeroed when not in use.

External AC Adapter: The Cambridge Audio 651P phono pre-amplifier includes an external AC power supply.

  • Input: 120V AC, 60Hz
  • Output: 12V - 500mA

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 verify what’s in the box, 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.