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

4. Starting up

4.1 Cabling and switching on

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

4.2 Level adjustment

Note: Level adjustment
By setting the level correctly we mean the signal level in
one or several devices in a signal chain is neither too high
nor too low. This applies equally to all circuits in a complete
circuit design (EQs, preamps etc.)
Consequently, care must be taken that no part of the circuit
is overloaded or that distortion is unintentionally added to
the signal.
We have carefully designed the circuit to achieve this
objective whilst also providing controls for „manual"
intervention.
input input
line
mic
IF_Alpha_20110621
First ensure, that the master level control is zeroed (over to
far left), so that when you are setting the sound level, the
signal passes through the electronics only and does not
reach the loudspeaker. By pressing the high-/low- (attn.)
resp. line-/mic-switches you can adapt the amplifi er to
your signal sources (guitar pickups, microphone etc).
Turn the gain control clockwise until the red clip indicator
fl ashes momentarily when playing with a strong attack.
Thus you make sure that your signal source (e.g. instru-
ment) provides the input-stage of the amplifi er with the
necessary input.
14
Before connecting to
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
relevant specs and safety
gain gain input input gain
line high high
mic
low low
input 1 input 1
The clip-LED indicates an overload. A short fl icker is of no
danger to AER devices. During operation a short fl icker
can be accepted, to be on the safe side you should reduce
the gain slightly to achieve an optimal and distortion-free
performance.

5. Functional characteristics

5.1 Tone control

The triple-band equalizer of your Alpha provides you with
an active and high quality sound interaction tool that
supports the natural tone of instruments and voice whilst
simultaneously off ering you the possibility of a controlled
accentuation.
With all controls in mid position the fi lters are set to
produce a very pleasing and natural sound impression
that you can „colour up" by using the colour fi lter with the
eff ect of lowering the mids and lifting the trebles. The tone
becomes more open and light and is especially suited for
fi ngerpicking techniques.
The equalization can support or soften the eff ect of the
colour fi lter and allows a diff erentiated mids-accentuation.
A: with colour-fi lter (switch pressed)
reduce treble to soften possible sharpness
colour
gain colour colour bass bass middle middle treble
clip clip
input 2 input 2
B: without colour-fi lter (switch not pressed)
boost treble to brighten the sound
colour
Note:
The active equalization of the Alpha eff ects the signal
adjustment. If you spot an intensifi ed fl ickering of the clip
indicator, readjust the signal level with the gain control (s.
4.2 Level adjustment).
bass middle
treble efx level efx level master master
power power
alpha alpha
bass middle
treble
treble