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4. Starting up
4.1 Cabeling and connection
Before connecting to mains, please ensure that your
Connecting to the wrong mains voltage may cause
serious damage to your amplifier!
If your amp is fitted with a mains voltage selector,
the voltage rating indicated on the voltage selector
is relevant.
Then connect all cables according to your applica-
tion and switch the device on. The green power LED
indicates operational readiness.
4.2 Level adjustment
By proper level adjustment you adapt the amplifier
to your signal sources (guitar pick-ups, micropho-
nes, etc.). For this purpose keep the master control
initially fully anticlockwise.
Set the line/mic switch to position mic if you are
using a microphone. Position line is suitable for all
types of guitar pickups and most other sources.
The mute switch should not be pushed.
Now gradually increase the appropriate gain setting
as far as possible but without triggering the red clip
indicator, even when you play loud. Thereby you
keep some headroom for unexpected peak levels.
Very strong sources may cause a clipping warning
despite a low gain setting. Such sources can be
attenuated first by pushing the high/low switch.
Finally set the desired volume using the master
control.
Now increase the gain setting when playing intensely
until the clip display flickers. This ensures that the
source (e.g. your instrument) is fully driving the input
stage of the amplifier. If the clip indicator lights up,
this generally indicates that the input signal is too
high. A short flickering is not dangerous with AER
devices. To be on the safe side, you should reduce
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local mains voltage (e.g.
120V in the USA, 230V
in Europe) matches the
voltage rating of the
device, which is printed
on the type label on the
rear side of the unit.
If the gain setting is too
low, the amplifier may
not reach the desired
volume, or distracting
noise may become
noticeable.
the gain control slightly to ensure optimum and
distortion-free playback.The high/low switch (attenu-
ator deactivation/activation) is also used, like the gain
control, to adjust the signal. Start in the high position,
switch not pressed. If the input signal is too strong
and you cannot avoid "clipping" even by adjusting the
gain control, select the low position.
Once the level control is complete, use the master
control to set the final volume.
5. Functional characteristics
5.1 mute
The mute switch turns the channel to mute as
required.
This function can also be controlled by a footswitch.
When the footswitch is connected, the mute switch is
not in effect, but the muted state is still indicated by
the red mute LED.
5.2 Tone control network
As with all AER products, the amp two is fitted with an
excellent basic tone thanks to the selection of com-
ponents, circuits and pre-equalizations. In addition,
various equalizer networks enable you to adjust the
basic tone to suit your personal requirements. With
amp two you can activate fixed filters (colour, bass
boost) and two adjustable filter networks (equalizer
and tone balance).
Note:
Basically, instruments reproduce their typical fre-
quency spectrum, but this is not necessarily what you
want, or there are some sounds you want, which the
instrument doesn't „naturally" reproduce or can play,
but not in the appropriate ratio. There are all kinds
of electronics can make these things possible, but in
certain circumstances the price you have to pay can
be a bad signal-to-noise ratio.
5.2.1 colour
The colour switch activates a fixed, pre-set contouring
„voicing"-filter, which reduces mids slightly at 360 Hz
and strongly emphasises trebles at 3.8 KHz.
5.2.2 bass boost
The bass boost strengthens the low frequencies at
55Hz. This gives the amp two enormous sound pressu-
re, so that it produces rich bass tones both when it is
placed on the ground and on a stand.
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