AER HEAD ONE, Руководство пользователя

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Head one
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3. Conception
The AER Head One is an integrated amplifier (Preamp plus
Power Amplifier) specifically designed to amplify electric or
semi-acoustic bass instruments.
As with all of our amplifiers, we place great value in designing
amplifiers as small as possible. The weight of an amplifier is as
important to us as the quick response, the efficiency (90% at
maximum volume) and the level of dynamic the Head One can
attain.
The extremely high efficiency and the acoustic output of the
Head One make this amplifier an integral part of the AER Series,
which is dedicated to developing modular amplification equip-
ment for electric musical instruments.
Please use the included block diagram which describes the most
important functions and characteristics.
The most important function characteristics are to be found
described on the attached block diagram.
The Head One contains one signal input and two corresponding
pre-amplifiers.
The sensitivity of all signal levels can be controlled using the Pad
ans Gain 1. Parallel to this signal path is a further Pre-Amplifier.
This is controlled the Pad and/or Gain 2 and together with a
Tube Emulation creates a distorted sound that can consequent-
ly be added to the clean sound using the Mix control.
Harmonics and Tone influence the type and frequency response
of the created distortion.
The Mute switch switches off the amplifier and all Outputs
except the Tuner Output.
The signal progresses further to two Equalizer Stepps which can
be selected by a switch, or can be bypassed by a secondary
switch. Consequently one has the opportunity to select be-
tween two seperate sound settings..
The DI Output has a seperate signal control. It's possible to
access the signal before or after the EG by using the Pre/Post EQ
switch. Following that is a Send/Return circuit (i.e. for Effects) to
enable signals to added either in parallel or in series.
The next Sound Control (Sparcling Filter) influences the whole
signal in the area of Bass and Treble, through a type of Sound
Scales and an intensity knob.
Using two selectable Master Controls (i.e. for Solo or Ensemble
level) the signal is passed on to the Line Out and an analogue
Signal Controller. This stops overloading of the power amplifier,
allowing an optimal allignment of the connected loudspeaker
from the AER Bottom Line Section.
A maximum of two footswitches can be connected allowing
remote control of the following functions:
• Gain2 or Tube Emulation on/off (can be connected to the Ma-
ster and/or EQ-switching, via a Jumper. Factory setting is with-
out connection)
• Equaliser 1 or 2 selection
• Master 1 or 2 selection
• Effect circuit on/off
The Power Amplifier is a 2 channel digital amplifier that can be
used in 3 different modi:
1. 2-Ch Mode: As a Fullrange Amplifier driving 2 full-range
loudspeaker boxes
2. 2-Way Mode: As a 2-Way active amplifier with one output
for a Bass Loudspeaker Cabinet and one for a High/Mid
Cabinet.
3. Bridge Mode: As a bridged amplifier for a higher output
level for use with a full-range cabinet (only recommeded for
use with an 8 Ohm cabinet)
The active crossover, neccessary for 2-way operation, can be
found before the power amplifier in the signal path.
The Bass and Treble signals can accessed at line level outputs,
thereby allowing connection to external amplifiers with louds-
peaker systems or active loudspeakers.
A switched power supply supplies the power amplifier with con-
stant working and the neccessary energy.
Extensive protection switching helps to protect the operating
parts against damage caused by incorrect operation or opera-
ting conditions.