CP1/CP2

PHONO PRE-AMPLIFIER

2

Contents

Important safety instructions ................................................................... 3

Limited warranty ...................................................................................... 4

Rear panel connections ........................................................................... 5

Front panel control .................................................................................. 5

Connections ............................................................................................ 6

Technical specifications .......................................................................... 6

Troubleshooting ....................................................................................... 7

Make sure you register your purchase.

Visit: http://www.cambridgeaudio.com/music-more

By registering, you’ll be the first to know about:

• Future product releases

• Software upgrades

• News, events and exclusive offers plus competitions!

This guide is designed to make installing and using this product as easy as possible. Information in this document has been carefully checked for accuracy at the time of printing; however, Cambridge Audio’s policy is one of continuous improvement, therefore design and specifications are subject to change without prior notice.

This document contains proprietary information protected by copyright. All rights are reserved. No part of this manual may be reproduced by any mechanical, electronic or other means, in any form, without prior written permission of the manufacturer. All trademarks and registered trademarks are the property of their respective owners.

© Copyright Cambridge Audio Ltd 2015.

Cambridge Audio and the Cambridge Audio logo are trademarks of Cambridge Audio.

CP1/CP2

Important safety instructions

For your own safety please read the following important safety instructions carefully before attempting to connect this unit to the mains power supply. They will also enable you to get the best performance from and prolong the life of the unit:

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other.

A grounding-type plug has two blades and a third grounding prong.

The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles and the point where they exit from the apparatus.

11. Only use attachments/accessories specified by the manufacturer.

12. Unplug this apparatus during lightning storms or when unused for long periods of time.

13. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as the power-supply cord or plug having been damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE AND

OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, SHOULD NOT BE

PLACED ON THIS APPARATUS.

Batteries (battery pack or batteries installed) shall not be exposed to excessive heat such as sunshine, fire or the like.

TO COMPLETELY DISCONNECT THIS APPARATUS FROM THE AC

MAINS, DISCONNECT THE POWER SUPPLY CORD PLUG FROM

THE AC RECEPTACLE. POUR DECONNECTER COMPLETEMENT

L’APPAREIL DU RESEAU D’ALIMENTATION, DECONNECTER LE

CORDON D’ALIMENTATION DE LA PRISE MURALE.

THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN

READILY ACCESSIBLE. LA PRISE DU RESEAU D’ALIMENTATION DOIT

DEMEURER AISEMENT ACCESSIBLE”.

The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of un-insulated

‘dangerous voltage’ within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the service literature relevant to this appliance.

WEEE symbol

The crossed-out wheeled bin is the European Union symbol for indicating separate collection for electrical and electronic equipment. This product contains electrical and electronic equipment which should be reused, recycled or recovered and should not be disposed of with unsorted regular waste.

Please return the unit or contact the authorised dealer from whom you purchased this product for more information.

CE mark

This product complies with European Low Voltage (2006/95/

EC), Electromagnetic Compatibility (2004/108/EC) and

Environmentally-friendly design of Energy-related Products (2009/125/

EC) Directives when used and installed according to this instruction manual. For continued compliance only Cambridge Audio accessories should be used with this product and servicing must be referred to qualified service personnel.

RCM (Regulatory Compliance Mark)

This product meets the Safety, EMC and Radio

Communications requirements of the ERAC and ACMA.

CU-TR Mark

This product meets Russia, Byelorussia and Kazakhstan electronic safety approvals.

FCC regulations

NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY

RADIO OR TV INTERFERENCE CAUSED BY UNAUTHORIZED

MODIFICATIONS TO THIS EQUIPMENT. SUCH MODIFICATIONS

COULD VOID THE USER AUTHORITY TO OPERATE THE EQUIPMENT.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the

FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

- Re-orient or relocate the receiving antenna.

- Increase the separation between the equipment and receiver.

- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

- Consult the dealer or an experienced radio/TV technician for help.

3

4

Ventilation

Important – The unit will become hot when in use. Do not stack multiple units on top of each other. Do not place in an enclosed area such as a bookcase or in a cabinet without sufficient ventilation.

Ensure that small objects do not fall through any ventilation grille. If this happens, switch off immediately, disconnect from the mains supply and contact your dealer for advice.

Please ensure there is ample ventilation (at least 20cm clearance on the top, side and rear). Do not put any objects on top of this unit. Do not situate it on a rug or other soft surface and do not obstruct any air inlets or outlet grilles. Do not cover the ventilation grilles with items such as newspapers, tablecloths, curtains, etc.

Positioning

Choose the installation location carefully. Avoid placing it in direct sunlight or close to a source of heat. No naked flame sources, such as lighted candles, should be placed on the unit. Also avoid locations subject to vibration and excessive dust, cold or moisture. The unit can be used in a moderate climate.

This unit must be installed on a sturdy, level surface. Do not place in a sealed area such as a bookcase or in a cabinet. Do not place the unit on an unstable surface or shelf. The unit may fall, causing serious injury to a child or adult as well as serious damage to the product. Do not place other equipment on top of the unit.

Due to stray magnetic fields, turntables or CRT TVs should not be located nearby due to possible interference.

Electronic audio components have a running in period of around a week

(if used several hours per day). This will allow the new components to settle down and the sonic properties will improve over this time.

Power sources

The unit should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power-supply to your home, consult your product dealer or local power company.

To turn the unit off, switch off at the front panel. If you do not intend to use this unit for a long period of time, unplug it from the mains socket.

Overloading

Do not overload wall outlets or extension cords as this can result in a risk of fire or electric shock. Overloaded AC outlets, extension cords, frayed power cords, damaged or cracked wire insulation and broken plugs are dangerous. They may result in a shock or fire hazard.

Be sure to insert each power cord securely. To prevent hum and noise, do not bundle the interconnect leads with the power cord or speaker leads.

Cleaning

To clean the unit, wipe its case with a dry, lint-free cloth. Do not use any cleaning fluids containing alcohol, ammonia or abrasives. Do not spray an aerosol at or near the unit.

Battery disposal

Please dispose of any discharged batteries according to local environmental/electronic waste disposal guidelines.

Connections

Before making any connections, make sure all power is turned off and only use suitable interconnects.

Servicing

These units are not user serviceable. Never attempt to repair, disassemble or reconstruct the unit if there seems to be a problem. A serious electric shock could result if this precautionary measure is ignored. In the event of a problem or failure, please contact your dealer.

Limited warranty

Cambridge Audio warrants this product to be free from defects in materials and workmanship (subject to the terms set forth below).

Cambridge Audio will repair or replace (at Cambridge Audio’s option) this product or any defective parts in this product. Warranty periods may vary from country to country. If in doubt consult your dealer and ensure that you retain proof of purchase.

To obtain warranty service, please contact the Cambridge Audio authorised dealer from which you purchased this product. If your dealer is not equipped to perform the repair of your Cambridge Audio product, it can be returned by your dealer to Cambridge Audio or an authorised

Cambridge Audio service agent. You will need to ship this product in either its original packaging or packaging affording an equal degree of protection.

Proof of purchase in the form of a bill of sale or receipted invoice, which is evidence that this product is within the warranty period, must be presented to obtain warranty service.

This Warranty is invalid if (a) the factory-applied serial number has been altered or removed from this product or (b) this product was not purchased from a Cambridge Audio authorised dealer. You may call

Cambridge Audio or your local country Cambridge Audio distributor to confirm that you have an unaltered serial number and/or you made a purchase from a Cambridge Audio authorised dealer.

This Warranty does not cover cosmetic damage or damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or modification of, or to any part of, the product. This Warranty does not cover damage due to improper operation, maintenance or installation, or attempted repair by anyone other than Cambridge Audio or a Cambridge

Audio dealer, or authorised service agent which is authorised to do

Cambridge Audio warranty work. Any unauthorised repairs will void this

Warranty. This Warranty does not cover products sold AS IS or WITH

ALL FAULTS.

REPAIRS OR REPLACEMENTS AS PROVIDED UNDER THIS

WARRANTY ARE THE EXCLUSIVE REMEDY OF THE CONSUMER.

CAMBRIDGE AUDIO SHALL NOT BE LIABLE FOR ANY INCIDENTAL

OR CONSEQUENTIAL DAMAGES FOR BREACH OF ANY EXPRESS

OR IMPLIED WARRANTY IN THIS PRODUCT. EXCEPT TO THE

EXTENT PROHIBITED BY LAW, THIS WARRANTY IS EXCLUSIVE

AND IN LIEU OF ALL OTHER EXPRESS AND IMPLIED WARRANTIES

WHATSOEVER INCLUDING, BUT NOT LIMITED TO, THE WARRANTY

OF MERCHANTABILITY AND FITNESS FOR A PRACTICAL PURPOSE.

Some countries and US states do not allow the exclusion or limitation of incidental or consequential damages or implied warranties so the above exclusions may not apply to you. This Warranty gives you specific legal rights, and you may have other statutory rights, which vary from state to state or country to country.

For any service, in or out of warranty, please contact your dealer.

CP1/CP2

Rear panel connections

R

MC

1

L

Designed & Engineered in Britain

Assembled in China

Turntable

Ground

2

R

MM

3

L

MC MM

2

L

1

0dB

1

R

2

Off

3 3

Cartridge Type

4

4 4

Balance

5

On

Subsonic Filter

6

R

Output

7

L

1. MC input sockets (CP2 only)

If your turntable uses a moving coil cartridge, connect outputs here

(0.5-1mV, with 100 ohm, 220pF loading).

2. Turntable ground

If your turntable has a separate grounding lead then connect here. This provides shielding to the arm and the sensitive circuitry in the turntable.

3. MM input sockets

If your turntable uses a moving magnet cartridge, connect outputs here

(3-5mV, with 47k ohm, 220pF loading).

4. Cartridge Type selector switch (CP2 only)

Match this switch to the cartridge type that your tunrtable uses. MM for a moving magnet cartridge or MC for a moving coil cartridge.

5. Balance

This control allows you to make fine adjustments to the relative output levels of the left and right channels. In the central position the output from each channel is equal.

6. Subsonic Filter (CP2 only)

The subsonic filter cuts out very low frequency ‘rumble’, caused by vinyl imperfections, which can affect your system’s performance.

7. Output sockets

Use phono cables to connect to any line level input on your amplifier, such as Aux.

NB. Do not connect to a phono level input.

8. PSU socket

Once you have completed all connections to the amplifier and turntable, plug the PSU power cable into an appropriate mains socket and switch the unit on via its front panel On/Off button. The LED on the front panel will indicate that the power is on.

Please note the 651P has an output relay, which after power on takes 15 seconds to come out of mute.

NB. Only use supplied power supply.

Front panel control

1

1. On/Off

Switches the unit between on and off.

0.5 A

8

5

Connections

Or

L R

Turntable

Power Supply Unit

(PSU)

Amplifier

6

Technical specifications

Max power consumption

Gain @ 1kHz

Nominal output

Sensitivity for nominal output

THD 20Hz-20kHz

RIAA curve accuracy

Signal to noise ratio using Audio Precision RIAA-1 with grounded inputs

Input impedance

Input capacitance

Overload margin

Crosstalk @ 20kHz

Dimensions (HxWxD)

Weight

CP1

5W

39dB

300mV

3.35mV

<0.009%

<+/-0.65dB

25hz-20kHz

>85dB

47k Ohm

220pF

>30dB

>76dB

46 x 215 x 133

(1.8 x 8.5 x 5.2”)

1.8lbs/0.8kg

CP2

5W

MM

39dB

300mV

3.35mV

<0.009%

<+/-0.3dB

20Hz-50kHz

(subsonic filter off)

86dB

47k Ohm

220pF

>30dB

>83dB

46 x 215 x 133

(1.8 x 8.5 x 5.2”)

2.0lbs/0.9kg

MC

55dB

300mV

3.35mV

<0.009%

<+/-0.3dB

20Hz-50kHz

>72dB

100 Ohm

220pF

>30dB

>69dB

Troubleshooting

There is no power

Ensure the power supply is connected securely to the unit.

Ensure the power supply is fully inserted into the mains socket and is switched on.

There is no sound

Make sure the unit is plugged in.

Check that your turntable is properly connected.

Check that your speakers are properly connected.

Check all connections are secure and correct amplifier input is selected.

Ensure correct cartridge type has been selected (MM or MC).

There is no sound on one channel

Check that your speakers are properly connected.

Check all connections are secure.

There is a loud buzz or hum

Check turntable or tone arm for ground and connection lead fault.

Ensure no connections are loose or defective.

Ensure that your turntable is not too close to the amplifier.

Volume is too loud/quiet

Check cartridge type matches input type. If a MC cartridge is connected through the MM inputs, volume will be very quiet (and vice versa). Note that it is possible to obtain high level MC cartridges which are designed for an MM input.

In the event that the above solutions do not remedy your problem, please consult our frequently asked questions (FAQ) section on our website: techsupport.cambridgeaudio.com

For all servicing, in or out of warranty, please contact your dealer.

CP1/CP2

7

Cambridge Audio is a brand of Audio Partnership Plc

Registered Office: Gallery Court, Hankey Place

London SE1 4BB, United Kingdom

Registered in England No. 2953313 www.cambridgeaudio.com

© 2015 Cambridge Audio Ltd