Starting Up; Cabling And Switching On; Level Adjustment; Functional Characteristics - AER Alpha Bedienungsanleitung

4. Starting up

4.1 Cabling and switching on

relevant specs and safety symbols are printed on the
rear side of the unit.
Connect all cables according to your application and
switch the amplifier on. The green power control LED
indicates operational readiness.

4.2 Level adjustment

By proper level adjustment you adapt the Alpha
to your signal sources (guitar pick-ups,
microphones, etc.).
For this purpose keep the master control initially fully
anticlockwise.
Set the line/mic switch (input 1) 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 first by pushing the high/low switch
(input 2).
Finally set the desired volume using the master
control.
• If the gain setting is too low, the amplifier 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 difficult.
• Please ensure there is always enough battery
power in your (active) pick-up system. Humming
and sizzling may be caused by an empty battery.
14
efore connecting to
B
mains, please ensure
that your local mains
voltage is suitable for
the voltage of the device
(e.g. 120V in the USA,
230V in Europe). 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 Alpha are a high-quality
sound modification 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 influence on the sound.
The amplifier will already provide a very pleasant, na-
tural sound when all controls are in neutral position,
which you can then principally alter with the colour
filter: This will reduce the midrange and bring out the
trebles. The sound becomes more open and lighter
and is particularly suitable for finger picking tech-
niques. The tone controls can support or attenuate
the effect of the colour filter (see illustration below).
colour bass middle
colour bass middle
Please note:
The tone controls have an effect on the signal level.
If the clip indicator flashes more frequently, reducet
he level a bit using the gain control (see also 4.2)
With colour-filter
treble
(switch pressed)
reduce treble
to soften possible
harshness.
treble
Without colour-filter
(switch not pressed)
boost treble
to brighten the
sound.