gain
selector knob
input
selector knob
headphone
socket
record
selector knob
volume
knob
remote control
window
mute
LED
power
LED
power
button
3
GAIN
6
9
12
15dB
RECORDINPUTVOLUME
0dB
aux
tuner
cd
tape 1
tape 2
tape 3
cd
tuner
aux
tape 1
tape 2
tape 3
left
right
left
right
out 3 2 1in out in out
right
in
left
right
left
right
ground
transformer
balanced
(option)
transformer
balanced
(option)
3
left
31 aux tuner cd
left
right
SOURCE
serial
number
220-240V
~
50-60Hz
Fuse: T1A L250V
made in United Kingdom
TAPE
OUTPUT
2
output
sockets
tape in/out
sockets
ground
terminal
input
sockets
XLR output
(optional)
XLR output
(optional)
ac supply
socket
fuse
carrier
PA2 1234567
02 welcome
08 key features
10 getting started
12 selecting an input
14 volume control
15 gain control
17 headphones
18 grounding
19 outputs
21 connecting power amplifiers
27 running in and warming up
28 care and maintenance
30 technical data
34 international standards
contents
Specification shown may vary for different countries
GRA00046.1-[CA]PA20R 13/03/01 11:11 Page 1
03
Now,this blend of talent and
expertise has been combined
with the award-winning
experience of Audiolab to create
a company with a technical
advantage and access to
resources second-to-none in the
high end audio industry TAG McLaren Audio.
TAG McLaren Audio has been created with
one aim in mind:to produce the best highfidelity audio and audio-visual systems
available.Now the first fruits of that
alliance are ready – a unique new range of
audio products.
Throughout the F3 Series development
process,quality,performance and
reliability have been paramount,resulting
in unparalleled performance,operational
excellence and sheer listening pleasure.
celebrating a TAG McLaren victory
All TAG companiesperpetually strive
for,and achieve,excellence and highperformance in every area of their
business.
These qualities are demonstrated in the
fastidious standards that make TAG Heuer
watches some of the world’s most
admired;in the teamwork that makes TAG
McLaren’s motor racing team one of the
most successful in Formula One;and in the
advanced electronics technology that
makes TAG Electronic Systems the first
choice for many Formula One constructors
and high-performance car makers.
Derek Scotland (on the left) – Technical Director
Peter Stevens – Chief Industrial Designer
Dr. Zucker – Chief Executive
welcome to a new partnership
..in hi-performance, hi-fidelity
GRA00046.1-[CA]PA20R 13/03/01 11:11 Page 3
We are convinced it will give you many hours of
listening pleasure.
The PA20R is a high-performance preamplifier which acts
as the command centre for your audio system.It has
microprocessor-controlled relays with gold-plated contacts
for its switching functions and,for added convenience,you
can select inputs,adjust the volume or mute the output by
remote control.‘Straight Line Technology’gives the PA20R
exceptional sound quality with an unusually
wide and flat frequency response.
Furthermore, by painstaking attention to
detail,TAG McLaren Audio engineers have
ensured that the versatile control facilities
do not affect the excellent sound quality.
In particular,the ‘Time Constant Switching’
system ensures that the muting period is
short even though the frequency response
reaches as low as 0.1 Hz.
versatile input
and recording selection
The PA20R has six selectable inputs and
three outputs for recording.A separate signal
path is provided for recording,with its own
independent input selector,so you can
record one piece of music while listening
to another.The microprocessor-controlled
relay switching system in the PA20R
welcome
welcome
0504
Thank you for purchasing the TAG McLaren Audio preamplifier PA20R.
includes a lock-out function to prevent
feedback loops when using a tape recorder.
low intermodulation distortion
The theoretically-ideal preamplifier
reproduces sound perfectly over an infinite
range of frequencies – starting from well
below the audible range and extending far
above the capabilities of human hearing.
Although sound outside the human hearing
range of approximately 20 to 20,000 Hz
cannot be heard,it can significantly distort
the quality of music reproduction through
an effect that audio engineers call
‘intermodulation distortion’.This type of
distortion moves imperfections that
originate outside the hearing range back into
the audible frequencies.To minimise this
effect,TAG McLaren Audio preamplifiers
have a frequency response which extends
GRA00046.1-[CA]PA20R 13/03/01 11:11 Page 5
control of volume and gain
Volume control on the PA20R is via a
motorised potentiometer.This gives you the
convenience of remote control without the
disadvantage of stepped volume changing,as
you might find in a digital electronic system.
The PA20R also has gain control to allow
you to select the right amount of
preamplification for your system to keep the
volume control near the middle of its range.
The gain switching facility is also used to
provide the correct volume range for a
wide variety of headphones.
high-quality circuitry
The circuits in the PA20R are ‘no-
compromise’designs using high-quality,
high-stability components to send a smooth,
clean signal to your power amplifier for
excellent sound quality.As a further
both above and below the range of normal
human hearing.
straight line technology
To prevent intermodulation distortion,
a preamplifier must respond to very low
frequencies but block any Direct Current
(DC).This is traditionally achieved using
capacitors,which also block some of the lowfrequency signal.In the PA20R,a feedback
circuit eliminates DC offset voltage and
allows the signal path to be direct coupled
without any capacitors.This arrangement,
which we at TAG McLaren Audio call
‘Straight Line Technology’,is easy to describe
but not easy to realise.The design has taken
our expert engineers years to perfect.
time constant switching
The PA20R has a sophisticated muting
system which protects your hi-fi and
prevents annoying,loud switching noises
from reaching the output.A preamplifier
that responds to low frequencies will ‘ring’
for a long time in response to the sudden
voltage changes that happen,for example,
when you select a different input.A muting
system that simply waited for the switching
transients to die down naturally would take
far too long to settle.To overcome this
problem,the PA20R incorporates a
technique developed by TAG McLaren Audio
called ‘Time Constant Switching’.
This changes the characteristics of the
preamplifier during input switching to
reduce the settling time,so that the mute
period can be as short as possible.
welcome
welcome
0706
refinement,the power supplies for the
right and left stereo channels have separate
regulators to prevent any interaction
between channels.
versatile analogue output
Two low-impedance outputs are provided
for connection to power amplifiers.As an
option,the PA20R can be fitted with an
additional transformer-coupled, balanced
XLR output for improved resistance to
electromagnetic interference and mains
frequency hum.
The PA20R,at the heart of your system,
keeps everything at the highest level of
hi-performance,hi-fidelity.
GRA00046.1-[CA]PA20R 13/03/01 11:11 Page 7
‘Straight Line Technology’ with direct coupled signal and
feedback paths
High-quality audio components
Independent input selection for listening and tape recording
Six line level inputs for: cd, tuner, auxiliary, and three tape
recorders
Digitally-controlled muting system, with ‘Time Constant Switching’,
operates automatically and by remote control
Motorised volume control and input selector can be operated
manually or by remote control
Remote control also operates selected TAG McLaren Audio F3
Series CD players
Gain selectable in six steps
Three stereo outputs for recording
Two low-impedance stereo outputs to allow long cable runs
An additional transformer-coupled and balanced output, via the
fitted XLR connectors, can be supplied as an option
Headphone output for a wide range of impedances with
automatic muting when headphones are plugged in
Sorbothane
®
sonic isolation feet specially, designed by
TAG McLaren Audio
(1)
•
•
•
•
•
•
•
•
•
•
•
•
•
08
09
key features key features
1. For the very best per formance we recommend that our units are placed on
individual shelves and are not stacked one on top of another
GRA00046.1-[CA]PA20R 13/03/01 11:11 Page 9
We know you are keen to get your PA20R working. This section
will have you listening to your favourite music as quickly as possible.
If you fold out the front cover of this manual, you will locate
diagrams which will help you find your way around your PA20R
(1)
.
Make sure that all the components of your audio system are
disconnected from the AC supply whenever you change any
connections.
You will need a source of audio signals (such as our CD player
CD20R or our tuner T20) to feed into your PA20R. Use a goodquality, screened phono-phono audio cable to connect the phono
output sockets of your sound source to the appropriate pair of
left and right sockets marked SOURCE aux,tuner, cd or TAPE in
1, in 2 orin 3 on the back of your PA20R
(2)
.
Use a good-quality, screened phono-phono audio cable to connect
the phono sockets marked OUTPUT 1 left and right on the back of
your PA20R to the corresponding inputs of your power amplifier.
Check that the power button is out so that power is off when you
plug in
(3)
. Using the cable supplied, connect the socket on the back
of your PA20R to an AC supply outlet. For the best sound quality,
we recommend that you do not use multi-plug adaptors.
before
you start
sound source
connection
amplifier
connection
power
connection
Turn the VOLUME right down (all the way anticlockwise).
Set the INPUT selector to the input to which you connected your
sound source.
Set the GAIN to 9 dB.
Press the power button in. The blue power LED will come on.
Wait for a few seconds until the mute LED on the front panel
goes out
(4)
.
Start playing your sound source.
Turn up the VOLUME, sit back and enjoy the music.
setting controls
switch on
10
11
getting started getting started
3
GAIN
6
9
12
15dB
0dB
1. Throughout this instruction manual (except in titles), bold print indicates the
lettering that you will find on the panels of your PA20R
2. The inputs for cd, tuner, aux, TAPE 1, TAPE 2 and TAPE 3 are all the same
electrically. They are named for your convenience
3. The power button is a latching switch. One press will hold it in, the next will
release it
4. The output is muted when the power is switched on to allow all the voltages to
stabilize. This protects your amplifier and loudspeakers and prevents unpleasant
switching noises from upsetting your listening experience
INPUT
cd
tuner
aux
tape 1
tape 2
tape 3
VOLUME
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 11
The signal from the input that you select for recording will be sent
to the record output sockets marked TAPE out 1, out 2 and out 3
(4)
.
To select your source for recording, turn the RECORD selector until
the mark on its side points to the name of the input that you want
to record
(5)
.
The record output is not affected by the muting or volume controls.
inputs for
recording
Your PA20R has six line level inputs which can be selected by
name
(1)
. The input for listening can be selected independently
from the input for recording, so you can listen to one source
and record another at the same time.
The signal from your chosen input source will be amplified and
sent to OUTPUT 1, 2, 3
(2)
and the headphone socket. To select your
source from the front panel, turn the INPUT selector until the mark
on its side points to the name of the input that you want to listen to.
You can also select an input for listening by pressing the button
on the remote control marked with the name of the input
(3)
.
For optimum performance from the remote control you must point
it towards the remote control pickup window on the front panel.
The remote control can also be used with selected TAG McLaren
Audio F3 Series CD players. For details, see the separate remote
control instructions.
inputs for
listening
using the
remote control
12
13
selecting an input selecting an input
RECORD
aux
tuner
cd
tape 1
tape 2
tape 3
1. The inputs for cd, tuner, aux, TAPE 1, TAPE 2 and TAPE 3 are all the same
electrically. They are named for your convenience
2. OUTPUT 3 is only functional if your PA20R has been fitted with the optional
transformer-coupled and balanced output. See page 19 for details
3. When you use the remote control, the INPUT selector on the front panel will turn
automatically to point to the selected input. Make sure that nothing interferes
with the free movement of the selector when you use the remote control
4. The TAPE out 1, out 2 and out 3 output sockets are connected together internally
5. With many preamplifiers, a feedback loop can be created if the output and input
of a tape recorder are both connected to the preamplifier and the same tape
recorder is selected as the record input. The PA20R has microprocessorcontrolled relays which prevent this from happening
INPUT
cd
tuner
aux
tape 1
tape 2
tape 3
left
right
left
right
out321in out in out in
TAPE
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 13
The VOLUME and MUTE controls alter the signal level of OUTPUT
1
, 2,3
(1)
and the headphone socket. They do not affect the output
of the record sockets (
TAPE out 1, 2 and 3).
Turn the
VOLUME knob clockwise to increase volume and
anticlockwise to decrease volume.
Alternatively you can use the
volume +button on the remote
control to increase volume and
volume – to decrease it
(2)
.
Press the
mute button on the remote control to switch off OUTPUT
1
, 2, 3 and the headphone output. Press the mute button again or
adjust the volume to restore the output.
The PA20R also mutes for about three seconds to allow all the
voltages to stabilize whenever you change the
GAIN or an INPUT
(3)
.
An LED on the front panel indicates when the PA20R is muted.
Different power amplifier and loudspeaker combinations can give
different sound levels from an identical preamplifier output signal.
For your added convenience, the PA20R has a
GAIN control to
compensate for this. The
GAIN control allows you to select the
right amount of preamplification to keep the volume knob near
its middle position when listening at a comfortable sound level.
The
GAIN control also provides a suitable volume range for a wide
variety of headphones.
The
GAIN control affects the volume of the sound from OUTPUT
1
, 2, 3
(1)
and the headphone socket. It does not affect the output
from the record sockets (
TAPE out 1, 2 and 3).
volume
mute
14
15
volume control gain control
1. OUTPUT 3 is only functional if your PA20R has been fitted with the optional
transformer-coupled and balanced output. See page 19 for details
2. When you use the remote control, the VOLUME knob on the front panel will turn
automatically. Make sure that nothing interferes with the free movement of the
knob when you use the remote control
3. Muting protects your PA20R, your amplifier and your loudspeakers and prevents
unpleasant switching noises upsetting your listening experience
VOLUME
1. OUTPUT 3 is only functional if your PA20R has been fitted with the optional
transformer-coupled and balanced output. See page 19 for details
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 15
Turn the GAIN selector to select a gain setting. Gain is the
amount of preamplification that the PA20R applies to the input
signal. It is shown in dB
(1)
.
Start with the GAIN selector in the middle of its range at 9 dB.
Play some music with roughly average dynamics and adjust the
volume to suit your normal listening. If the VOLUME knob is near
the low end of its scale, decrease the GAIN. If it is near the top
end, increase the GAIN. Choose a GAIN setting which allows the
VOLUME knob to sit nearest its middle position.
To avoid excessive sound levels from, and prevent damage to,
your loudspeakers, you should reduce the volume before you turn
up the gain.
You can find the GAINsetting for your headphones in the same
way. You may find that the best setting for headphones is different
to that for your power amplifier and loudspeaker combination.
Turn the VOLUME down before you connect your headphones.
Insert the headphone plug into the
1
/
4” (6.3 mm) stereo jack socket
on the front panel of your PA20R
(1)
.
When you plug in your headphones, OUTPUT 1,2 and 3
(2)
are
automatically muted.
headphone
connection
loudspeaker
muting
choosing the
best gain setting
16
17
gain control headphones
1. If you want to use headphones which have the smaller
1
/
8” (3.2 mm) jack plug,
you should obtain an adaptor from your retailer. Remove the adaptor from the
socket when you are not using the headphones or the output will remain muted
2. OUTPUT 3 is only functional if your PA20R has been fitted with the optional
transformer-coupled and balanced output. See page 19 for details
1. dB (short for decibel) is a logarithmic scale of the ratio between input and
output. A step of 3 dB is equivalent to a factor of two in output power, and the
human ear perceives 10 dB as an approximate doubling of the sound level
3
GAIN
6
9
12
15dB
0dB
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 17
The AC mains supply normally operates at either 50 or 60 Hz
(depending on which country you are in). Under some
circumstances, this can cause an audible hum in your
loudspeakers.
Should you have any problems with hum in your system,
please contact your retailer.
To minimise the possibility of mains hum in your system:
do not link the ground terminals of separate audio units
together.
use screened cable for your signal connections and keep
the left and right channel cables close together.
All the units in the TAG McLaren Audio F3 Series are double
insulated and do not require safety ground connections.
Although a ground terminal is provided on the PA20R, for your
convenience your system does not need to be connected to
ground (audio engineers call this ‘floating’). However, if you want
to ground your system, please contact your retailer who will be
able to assist you.
The audio outputs are intended to connect the PA20R to one or
more power amplifiers (such as our 60P, 100P or 125M).
The low-impedance (100 Ω) output is buffered and will drive long
cables or several inputs in parallel if required.
OUTPUT 1 and 2 each consists of two phono sockets on the back
panel of your PA20R, one for the left channel and one for the right
(1)
.
Always use high-quality, screened cables for your connections.
audio output
sockets
avoiding hum
grounding
your system
18
19
grounding outputs
left
right
left
right
1
OUTPUT
2
1. OUTPUT 1 and 2 are connected together in parallel
ground
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 19
As an option, the PA20R can be fitted with transformers to
provide a balanced output via XLR connectors. This gives greatly
enhanced immunity to electromagnetic interference, resulting in
less noise, especially if long cables are used. This type of
connection is often used in professional applications.
Please contact your retailer if you require this option.
If you do not have the transformer-coupled, balanced output
option, the XLR sockets labelled OUTPUT 3left and right are
not connected and cannot be used
(1)
.
When the transformer-coupled, balanced output option is
installed, you can use the XLR sockets labelled OUTPUT 3on the
back panel of your PA20R. The output uses two XLR sockets, one
for left and one for right.
The XLR connectors are latched so you will hear a click when the
plug is fully inserted. You have to press the button on the plug to
remove it.
Always use high-quality, screened cables for your connections.
20
21
outputs connecting power amplifiers
transformer-
coupled,
balanced
audio output
(option)
Your PA20R needs to be connected to a high-quality, separate
stereo power amplifier (such as our 60P or 100P) or to a pair of
monoblocs
(1)
(such as our 125M).
Always switch off your system before changing any connections.
Using a good-quality, screened phono-phono audio cable,
connect the phono sockets marked OUTPUT 1
(2)
left and right on
the back of your PA20R to the corresponding inputs of your
power amplifier.
using a stereo
power amplifier
1. TAG McLaren Audio has pre-installed the XLR connectors to make the upgrade
quick and easy
This diagram shows a
PA20R connected to a
TAG McLaren Audio
100P stereo power
amplifier
(3)
1. A ‘monobloc’ is a single-channel or mono power amplifier
2. You can use OUTPUT 2 instead of OUTPUT 1. They are the same electrically.
OUTPUT 3 is only functional if your PA20R has been fitted with the optional
transformer-coupled and balanced output. See page 19 for details
3. This diagram, and those that follow, are for illustrative purposes only; they are
not to scale and do not show all connections
out
outin
hf
lf
left speakerright speaker
hf
lf
left
right
left
right
1
OUTPUT
2
right
left
right
left
right
ground
transformer
balanced
(option)
transformer
balanced
(option)
3
left
31
OUTPUT
2
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 21
22 23
connecting power amplifiers connecting power amplifiers
Instead of one stereo power amplifier, you may prefer to use two
monobloc amplifiers (such as our 125M) in conjunction with your
PA20R.
Connect OUTPUT 1left of the PA20R to the audio input of one of
the monoblocs and OUTPUT 1right to the audio input of the
other monobloc. Connect each monobloc to a loudspeaker
(1)
.
With many high-quality loudspeakers, you can make separate
connections to the high- and low-frequency drivers
(1)
. If your
loudspeaker allows it, you can improve the sound further by using
separate amplifiers for high and low frequencies. This may allow
you to increase the volume without distorting the sound. As each
amplifier is operating in a smaller bandwidth, intermodulation
distortion may also be reduced.
bi-ampingusing mono
amplifiers
This diagram shows a
PA20R connected to
two TAG McLaren
Audio monobloc 125M
power amplifiers
1. For the best sound quality we recommend that you place each monobloc near
the loudspeaker it is feeding and use short loudspeaker leads. Use high-quality,
screened phono leads to connect the amplifiers
1. The ‘driver’ is the mechanism inside the case of the loudspeaker which actually
makes the sound. Most high-quality loudspeakers have drivers for high, low and
often middle frequencies and the capability to connect them separately.
However, the lack of this facility is not necessarily a sign of low quality (as some
of the finest loudspeakers in the world have proved)
out
outin
hf
lf
left speaker
hf
lf
right speaker
outin
left
right
left
right
1
OUTPUT
2
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 23
If you have two matched amplifiers (such as two TAG McLaren
Audio 100Ps), you can connect them as shown here.
This arrangement has the added advantage of allowing you to
place each amplifier close to the loudspeaker it is feeding, thus
enabling you to connect them together with short cables.
Connect OUTPUT left on the PA20R to INPUT left on one of the
100Ps and OUTPUT right on the PA20R to INPUT left on the other
100P. On each 100P connect OUTPUT left to OUTPUT right.
On each amplifier, connect one of the stereo outputs to the highfrequency driver and the other to the low-frequency driver.
bi-amping
alternative
arrangement
This diagram shows an
alternative method of
connecting the PA20R
to two TAG McLaren
Audio 100P stereo
power amplifiers
for bi-amping
outin
outin
hf
lf
left speaker
hf
lf
right speaker
out
100P
100P
Connect OUTPUT 1 leftand right of the PA20R to the left and right
audio input of one stereo power amplifier and OUTPUT 2 left and
right to the left and right audio input of the other stereo power
amplifier. Connect one power amplifier to your loudspeakers’
high-frequency drivers and the other power amplifier to the
low-frequency drivers
(1)
.
This diagram shows
a PA20R connected
to two TAG McLaren
Audio 100P stereo
power amplifiers
for bi-amping
bi-amping
1. This simple connection method works with any combination of TAG McLaren
Audio F3 Series amplifiers because they have matched gains. If you want to
connect a different manufacturer’s amplifier, you may need to use an active
crossover or a gain-setting facility. Please contact your retailer for advice if you
wish to do this
outin
outin
hf
lf
right speaker
hf
lf
left speaker
out
100P
100P
connecting power amplifiers
24
connecting power amplifiers
25
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 25
TAG McLaren Audio equipment is designed to give optimum
performance for many years.
Just like a high-quality car, the performance of your PA20R will
improve during the first few hours of operation. The electronic
components will then have reached and settled down to nearperfect specification.
Every time you switch on your PA20R, the performance will
improve until the components reach their optimum operating
temperature.
running in
warming up
The arrangements described on the previous pages are only
suggestions and do not cover all the connection possibilities for
preamplifiers and power amplifiers.
If you want to expand your audio system, please contact your
retailer who will be happy to discuss your specific requirements.
other multiple
amplifier
arrangements
running in and warming upconnecting power amplifiers
26 27
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 27
service The only service you should do to your PA20R is described on the
left. All other servicing should only be carried out by one of our
authorised service agents.
If service is required, please contact your authorised TAG
McLaren Audio retailer. If your PA20R is still under guarantee,
please refer to the guarantee card which gives you details on
how to claim against the guarantee.
Please keep the original packaging and use it whenever your
PA20R is transported.
1. You cannot open the fuse carrier drawer while the plug is in the socket
fuses
cleaning
There is a fuse in the power socket on the back of your PA20R.
To change the fuse, unplug the power cable and pull out the fuse
carrier drawer
(1)
.
The fuse carrier contains a spare fuse; this is the first one that
you see when you open the carrier.
There are no other user-serviceable parts inside the PA20R.
In order to maintain the appearance of your PA20R, you can
clean it as follows:
before cleaning, always disconnect your PA20R from the AC
supply.
any grease or dirt on the case may be removed with a soft,
lint-free cloth moistened slightly with a mild solution of warm
water and detergent or washing-up liquid. Do not use any
other solutions. Do not use any solvents or abrasives.
take great care not to get any liquid inside the case.
If this happens, you should have your PA20R serviced.
care and maintenancecare and maintenance
28 29
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 29
31
technical data
technical data
30
less than 0.007%
greater than 100 dB at 1 kHz
greater than 100 dB at 1 kHz
non-inverting for all inputs and outputs
100 Ω nominal
greater than 7.7 V rms (20 dBm)
OUTPUT 1 phono socket
OUTPUT 2 phono socket
OUTPUT 3 XLR (optional connection)
frequency response
(20 Hz – 20 kHz)
total harmonic
distortion + noise
channel separation
crosstalk rejection
polarity (phase)
preamplifier output
impedance
preamplifier
maximum output
20 kΩ
500 mV at 0 dB (relative to 0.5 V output)
350 mV at 3 dB (relative to 0.5 V output)
250 mV at 6 dB (relative to 0.5 V output)
175 mV at 9 dB (relative to 0.5 V output)
125 mV at 12 dB (relative to 0.5 V output)
90 mV at 15 dB (relative to 0.5 V output)
greater than 97 dB (relative to 0.5 V output)
0.1 Hz – 75 kHz
± 0.2 dB
This section is for those of you who really want to know the ‘insides’ of
your PA20R. You will not miss out on any of the functions or performance
of your PA20R if you choose not to read any further.
input impedance
input level
vs
gain setting
signal to noise
frequency response
(-3 dB)
audio output
connector
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 31
33
technical data
technical data
32
greater than 63 dB
10 – 35
˚C
50 – 60 Hz
110 – 120 V or 220 – 240 V
The voltage is marked on the rear of the unit
less than 25 W
445 mm wide
75 mm high
336 mm deep
headphone
output impedance
signal to noise
(headphone output)
muting attenuation
operating
temperature range
ac supply
frequency
ac supply
voltage
standard not connected
transformer pin 1 – ground
coupled pin 2 – non-inverting signal
(option) pin 3 – inverting signal
1 kΩ nominal
0 dB (i.e. the record output level is the same as the input level)
greater than 7.7 V rms emf
18 dB (additional to 0 – 15 dB variable gain)
100 Ω (suitable for headphones of 8 Ω – 2 kΩ impedance)
greater than 80 dB
record output
impedance
record output gain
headphone
maximum output
XLR connector
wiring
headphone
amplifier gain
power consumption
dimensions
(including feet, terminals
and controls)
We reserve the right to alter designs and specification without notice
Specification may vary for different countries
The rated and typical performance applies when the mains supply voltage is either
230 V AC for 220 - 240 V units or 115 V AC for 110 - 120 V units
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 33
international standards
34
Your PA20R meets or exceeds all the legal requirements listed below:
Units supplied in USA and Canada also comply with UL6500: Rev. Dec 1997
directives
safety
emc emissions
emc immunity
89/336/EEC EMC Directive (as amended by 93/23/EEC)
73/23/EEC Low Voltage Directive (as amended by 93/23/EEC)
IEC65: 1985
IEC65 A2: 1989
IEC65 A3: 1992
EN60065: 1993
EN50081 -1: 1992
EN55022 Class B: 1994
EN60555 -2: 1987
EN61000 -3-2: 1995
EN61000 -3-3: 1995
FCC Part 15 Class B: 1997
EN50082 -1: 1992
IEC801 -2: 1991 ± 8 kV air discharge
IEC801 -3: 1984 3 V/m
IEC801 -4: 1988 ± 1 kV AC power, ± 500 V other ports
EN61000 -4-2: 1995 ± 8 kV air, ± 4 kV contact discharge
EN61000 -4-4: 1995 ± 1 kV AC power, ± 500 V other ports
EN61000 -4-5: 1995 ± 2 kV common mode, ± 1 kV differential mode
EN61000 -4-11: 1994
GRA00046.1-[CA]PA20R 13/03/01 11:12 Page 35
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