azur 540P/640P
Phono pre-amplifer
User’s manual
540P/640P Phono pre-amplifer
CONTENTS
IMPORTANT SAFETY INSTRUCTIONS
Introduction .................................................................................................2
Important safety Information......................................................................3
Rear panel connections..............................................................................4
Troubleshooting......................................................................................... 6
Specifications ............................................................................................6
Please take a moment to read these notes before installing your Azur
phono pre-amplifier, they will enable you to get the best performance
and prolong the life of the product. We advise you follow all instructions,
heed all warnings and keep the instructions for future reference.
This unit must not be exposed to dripping or splashing water or other
liquids. No objects filled with liquid, such as vases, shall be placed on
the unit. In the event, switch off immediately, disconnect from the mains
supply and contact your dealer for advice.
Do not route the power cable so that it can be walked upon or damaged
by other items near it.
Limited warranty.......................................................................................
7
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, the sonic properties will improve over this time.
If you do not intend to use this unit for a long period of time, unplug it
from the mains socket.
To clean the unit, wipe its case with a moist, lint-free cloth. Do not use
any cleaning fluids containing alcohol, ammonia or abrasives. Do not
spray an aerosol at or near the amplifier.
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.
Azur phono pre-amplifier 3
REAR PANEL CONNECTIONS
azur 540P
azur 640P
MM/MC Phono Pre-Amplifier
Turntable
Ground
Turntable
Ground
MM Phono Pre-Amplifier
R
L
R
L
Designed in London, England
R
L
R
L
R
L
Designed in London, England
12V
12V
On
Subsonic Filter
This device complies with part 15 of FCC rules
Off
MM
MC
0.5 A
0.5 A
R
Output
L
R
MM
L
R
Output
L
Cartridge Type
R
MM
L
R
MC
L
Manufactured in an
ISO9002 approved facility
Use supplied PSU only!
Phono Input
Use supplied PSU only!
This device complies with part 15 of FCC rules
Manufactured in an ISO9002 approved facility
540P
MC input sockets (640P only)
640P
Subsonic Filter (640P only)
If your turntable uses a moving coil cartridge, connect outputs here
(0.5-1mV, with 100 ohm 220pF loading).
The subsonic filter cuts out very low frequency ‘rumble’, caused by vinyl
imperfections, which can affect your system’s performance.
MM input sockets
Output sockets
If your turntable uses a moving magnet cartridge, connect outputs here
(3-5mV, with 47k ohm 220pF loading).
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.
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.
PSU socket
Once you have completed all connections to the amplifier and turntable,
plug the PSU power cable into an appropriate mains socket. The blue
LED on the front panel will indicate that the power is on. The unit has
been designed to be left permanently powered.
Cartridge Type selector switch (640P 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.
Please note the 640P has an output relay, which after power on takes
15 seconds to come out of mute.
NB. Only use supplied power supply.
4 Azur phono pre-amplifier
540P/640P Phono pre-amplifer
only one of these
connections
To any line level
input on you
amplifier using
phono cable
(2RCA-2RCA)
From a
turntable
with a
moving
magnet
cartridge
using
phono
cable
(2RCA-2RCA)
To any line level
input on you
amplifier using
phono cable
(2RCA-2RCA)
From a
turntable
with a
moving
magnet
cartridge
using
phono
cable
(2RCA-2RCA)
From a
turntable
with a
moving
coil
cartridge
using
phono
cable
(2RCA-2RCA)
Must not be
connected to a
phono level
input
Must not be
connected to a
phono level
input
azur 540P
MM Phono Pre-Amplifier
Turntable
Ground
azur 640P
MM/MC Phono Pre-Amplifier
Turntable
Ground
R
L
R
L
Designed in London, England
R
L
R
L
R
L
Designed in London, England
12V
12V
On
Subsonic Filter
This device complies with part 15 of FCC rules
Off
MM
MC
0.5 A
0.5 A
R
Output
L
R
MM
L
R
Output
L
Cartridge Type
R
MM
L
R
MC
L
Manufactured in an
ISO9002 approved facility
Use supplied PSU only!
Phono Input
Use supplied PSU only!
This device complies with part 15 of FCC rules
Manufactured in an ISO9002 approved facility
540P
640P
Azur phono pre-amplifier 5
TROUBLESHOOTING
SPECIFICATIONS
540P
640P
(MM)
640P
(MC)
There is no power
Ensure the AC power cord is connected securely.
Ensure the plug is fully inserted and is switched on.
Max power consumption
Gain @ 1kHz
5W
5W
5W
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).
39dB
300mV
3.35mV
39dB
300mV
3.35mV
55dB
300mV
0.5mV
Nominal output
Sensitivity for
nominal output
THD 20Hz-20kHz
<0.009%
<0.005%
<0.002%
There is no sound on one channel
Check that your speakers are properly connected.
Check all connections are secure.
RIAA curve accuracy
<+/-0.65dB
25hz-20kHz
<+/-0.3dB
20Hz-50kHz
<+/-0.3dB
20Hz-50kHz
(subsonic filter off)
There is a loud buzz or hum
Signal to noise ratio
using Audio Precision RIAA-1
with grounded inputs
>85dB
>76dB
>86dB
>72dB
>69dB
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.
Crosstalk @ 20kHz
>83dB
Volume is too loud/quiet
Dimensions (HxWxD)
mm
46 x 215 x 133
1.8 x 8.5 x 5.2
46 x 215 x 133
1.8 x 8.5 x 5.2
46 x 215 x 133
1.8 x 8.5 x 5.2
Check cartridge type matches input type. If a MC cartridge
is connected through the MM inputs, volume will be very
quiet (and vica versa). Note that it is possible to obtain
high level MC cartridges which are designed for an MM
input.
inches
Weight
kg
lbs
0.8
1.8
0.9
2
0.9
2
6 Azur phono pre-amplifier
540P/640P Phono pre-amplifer
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.
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.
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.
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.
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 purchased
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
Azur phono pre-amplifier 7
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