Ehrlund ACOUSTIC PICKUP + PREAMPLIFIER Manuel utilisateur
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EHRLUND
ACOUSTIC PICKUP
+ PREAMPLIFIER
MANUAL | ENG
CONTENTS
QUICKSTART ................................ 3
PICKUP .......................................... 5
Attaching the pickup .................... 6
PREAMP ......................................... 9
Features Preamp .........................10
Phase switching ..........................10
Operation High/Low ...................11
Volume control .............................11
Replacing the battery .................12
THINGS TO BEAR IN MIND ..14
The pickup is connected to the preamp at the IN-
PUT jack socket. The mixer/amplifier is connected
to the OUTPUT jack socket. Note that the preamp
automatically switches on when a connection is
made in the OUTPUT jack socket.
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A cleaner sound.
1. Fix the pickup to the instrument using the adhesive supplied.
Shape the adhesive into small balls about 3-4 mm in diameter
and attach these to the corners of the pickup. Then stick the
pickup down where you want it on the instrument. For more infor-
mation, see page 6.
2. Connect the pickup to the input on the preamp.
3. Connect the output from the preamp to the amplifier/mixer.
4. The volume control on the preamp is normally set to maximum.
The volume is usually controlled by the connected amplifier/mixer.
5. If you think the sound is strange, for example due to feedback,
this may mean that the phase switch needs to be changed.
6. You may need to adjust the High/Low switch, depending on
the gain at subsequent stages. For example, if you feel that the
sound is clipped, you can try setting this switch to “Low”.
7. When the preamp is not in use, disconnect the cable between
the preamp and the mixer/amplifier. The “output” jack acts as the
switch to turn the preamp on and off. When you connect a cable
to “Output”, the preamp switches on automatically.
EAP SYSTEM QUICKSTART
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TECHNICAL SPECIFICATIONS PICKUP
Length 28 mm
Width 25 mm
Height 5 mm
Weight 4 g
Length of cable 150 cm
Weight with cable and connector 42 g
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THE EHRLUND ACOUSTIC PICKUP (EAP) is an ultra-linear con-
tact microphone for instruments with an acoustic sound box, such
as the guitar, violin, double bass and ethnic instruments. It is made
entirely in Sweden and is based on the same knowledge of sound
recording as Ehrlund’s other products.
A linear microphone means that the pickup reproduces a flat
frequency response. The pickup captures the vibrations of the
acoustic instrument, enabling the microphone to provide excel-
lent separation, even in what are normally “impossible” conditions,
where musicians playing together generate high noise levels on
their respective instruments. In testing, very good results were
achieved, for example, in mismatched combinations, such as heavy
metal music and the cello.
The EAP is sold separately or in a set, EAP SYSTEM, together
with the PREAMP.
EHRLUND ACOUSTIC PICKUP
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ATTACHING THE PICKUP
The EAP can be moved easily between different instruments. The pickup
is easy to attach using adhesive on the sound box. The pickup can also
be attached to the inside of the instrument via the sound hole.
Each instrument is unique, which is why the positioning of the pickup
needs to be tested in advance. The first time you do this, it can take some
time before you find the best position. We know from experience that it is
worth the time it takes to find the ideal position for the pickup, so that the
people in front of you get a musical experience that is the same as if you
were playing without amplification. Some musicians have made a card-
board template to fit against part of the instrument, which makes it easier
to attach the pickup in the same place for every performance.
Some examples of positions that usually work really well.
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The adhesive needs to be shaped into small balls about 3-4 mm in dia-
meter and attached to the corners of the pickup. Never attach adhesive
to the middle of the pickup. Then stick the pickup down carefully on the
instrument so that there is about 2 mm of space between the pickup
and the instrument.
The adhesive used to attach the pickup is sometimes queried.
However, violinists who have been using the pickup for many years say
that they cannot see any marks on their instruments. Use only the white
adhesive that is supplied with the pickup. Other types of grey or green
adhesive may leave marks. The recommended adhesive is Faber-Castell
TACK-IT White, art. no. 18 70 91-60.
The adhesive needs to be shaped into small balls about 3-4 mm in diameter and attached
to the corners of the pickup. Important: Never attach adhesive to the middle of the pickup.
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TECHNICAL SPECIFICATIONS PREAMP
Length 92 mm
Width 60 mm
Height 37 mm
Weight 150 g
Battery 9V/6LR61/6LF22/MN1604
Power consumption 0,5 mA
Minimum supply voltage 7,2 V
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THE EHRLUND PREAMP has extremely low self-noise and low
power consumption. It is optimised for use with the Ehrlund EAP
pickup. It is able to operate with most existing accessories, such as
foot pedals, effects pedals and transformer-equipped DI boxes.
The preamp is fitted with a belt clip and can easily be attached to
the waistband. It is powered by a 9 V battery, has a long operating
time of at least 600 hours and switches off when the output cable is
disconnected.
The preamp can be adjusted for volume control, basic amplification
and phase adjustment to avoid feedback during live performance.
Like other Ehrlund products, the preamp is developed and manu-
factured in Sweden.
EHRLUND PREAMPLIFIER
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FEATURES PREAMP
Input 6,3 mm tele jack
Output 6,3 mm tele jack. The Preamp turns itself off when the
output cable is disconnected.
Phase switch The unit has a phase switch (0-180°) which is used to
avoid feedback during live performance.
High/Low The unit can be adjusted for high/low input from the
microphone.
PHASE SWITCHING
It should also be remembered that the switch for phase can make
a big difference, because the speaker can work with or against the
instrument’s sound box. Use the switch to get the best possible
sound. This is particularly useful to bear in mind when playing at
high volume in small venues.
If the sound is “tinny”, you can try to move the switch to its other
position.
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