Hello, and thank you for viewing my listing. I have this lightly used Cambridge Audio MM Phono Pre-Amplifier for sale. Everything works as it should. This was used for a 3rd system at our lake cottage home. So, the unit was really only used for a 2 months of the year and occasionally as we don't go to the lake to listen to music :). This unit is a one owner item bought by myself in 2015. Thank you for looking and enjoy.

The Cambridge Audio Azur 551P is highly praised for its clear and crisp sound, especially when paired with a good turntable and cartridge. Users have found it to be a substantial upgrade from built-in phono stages and other external pre-amps. It is also noted for its reliability and ease of use. Some users have recommended it as a cost-effective option for those looking to improve their vinyl listening experience.

Product highlights:
compatible with moving magnet 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 integrated circuits for greater dynamics and lower noise
single-ended 'Class A' gain stage with audiophile-grade passive RIAA equalization
gain: 39dB (at 1 kHz)
signal-to-noise ratio: greater than 85dB
THD: less than 0.009% (20-20,000 Hz)
RIAA response accuracy: ±0.65dB (25-20,000 Hz)
crosstalk at 20 kHz: greater than 76dB

Features
Overview: The Cambridge Audio 551P MM phono pre-amplifier has been designed to complement a wide range of entry-level MM (moving magnet) turntables. This high-quality pre-amplifier contains the amplification required to enable you to connect your MM 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 551P. Connected using a stereo audio interconnect cable, the 551P 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 551P MM phono pre-amplifier features an acoustically damped full metal chassis with a thick brushed aluminum front-panel.

Moving Magnet (MM) Compatible: The Cambridge Audio 551P is a Moving-Magnet-type (MM) phono stage; which describes the commonly used type of cartridge (sometimes referred to as a "needle" or "stylus") configuration typically supplied with affordable modern turntables.

Class A Amplification: The 551P MM phono pre-amplifier utilizes a single-ended "Class A" gain stage with audiophile passive RIAA equalization for excellent sound quality.

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

MM Phono Input: The Cambridge Audio 551P MM phono pre-amplifier is fitted with a set of stereo RCA inputs to connect your MM (moving magnet) cartridge turntable.

Audio Output: The Cambridge Audio 551P MM 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 551P to a "Phono Input" on a receiver or amplifier.

Ground Terminal: The 551P 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.

Power Switch: The Cambridge Audio 551P 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 551P MM phono pre-amplifier includes an external AC power supply.

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