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

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 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 elect-
ronics 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. instrument) provides the input-stage of
the amplifi er with the necessary input.
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
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.
Finally set the desired overall volume level with the
master level control.

5. Functional characteristics

5.1 Tone control

The triple-band equalizer of your Alpha Plus
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 impressi-
on 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.
colour
gain colour colour bass bass middle middle treble
clip clip
input 2 input 2
A: with colour-fi lter (switch pressed)
reduce treble to soften possible sharpness
colour
B: without colour-fi lter (switch not pressed)
boost treble to brighten the sound
Note:
The active equalization of the Alpha Plus 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