Starting Up; Cabling And Switching On; Level Adjustment; Functional Characteristics - AER Compact 604 Mode D'emploi

4. Starting up

4.1 Cabling and switching on

Before connecting to mains, please ensure that your
rear side of the unit.
Connecting to the wrong mains voltage may cause
serious damage to your amplifi er!
Make sure the phantom power (see chapter 5.4) is
not switched on unintentionally.
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
Compact 60 to your signal sources (guitar
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pick-ups, microphones, etc.).
For this purpose keep the master control initially
fully anticlockwise.
Set the line/mic switch (channel 2) to position
mic if you are using a microphone. Position line is
suitable for all types of guitar pickups and most
other sources.
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 fi rst by pushing the high/low switch
(channel 1).
Finally set the desired volume using the master
control.
• If the gain setting is too low, the amplifi er may
not reach the desired volume, or distracting noise
may become noticeable.
• Setting the gain too high causes distorted sound
(clipping). The clip light will warn you before this
happens.
• If you use an instrument with a volume control,
start off with full volume but reduce it if the clip
indicator lights up early and the level adjustment
is diffi cult.
• Please ensure there is always enough battery
power in your (active) pick-up system. Humming
and sizzling may be caused by an empty battery.
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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
• If several inputs are used simultaneously, you also
determine the mixing ratio by the individual gain
settings.
• The gain controls of any unused inputs should
stay fully anticlockwise.

5. Functional characteristics

5.1 Tone control

The tone controls of the Compact 60
quality sound modifi cation tool that preserves the
natural tone of instruments and voice and allows
you to apply targeted accentuations.
If bass, middle, and treble are in center position and
the colour switch is not pushed, the tone controls
are neutral and have no infl uence on the sound.
The amplifi er will already provide a very pleasant,
natural sound when all controls are in neutral
position, which you can then principally alter with
the colour fi lter: This will reduce the midrange and
bring out the trebles. The sound becomes more
open and lighter and is particularly suitable for
fi nger picking techniques. The tone controls can
support or attenuate the eff ect of the colour fi lter
(see illustration below).
colour bass middle
colour bass middle
Please note:
The tone controls have an eff ect on the signal level. If the
clip indicator fl ashes more frequently, reduce the level a bit
using the gain control (see also 4.2).
are a high-
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With colour-fi lter
treble
(switch pressed)
reduce treble
to soften possible
harshness.
Without colour-fi lter
treble
(switch not
pressed)
boost treble
to brighten the
sound.