15
5.3 Footswitch
A standard double-footswitch (on-/off-switch)
can be plugged into the
footswitch
-socket on the
rear side of the amplifier via stereo cable. By this
footswitch the internal and external effects can be
switched on and off.
5.4 Phantom power
Microphones requiring
48 V phantom power
can
be directly connected to the
XLR-socket
of
input 1
.
Factory-provided phantom power is activated but,
if required, may be deactivated by an internal
jumper.
In contrary
9 V phantom power
, if required, can
additionally be activated in
input 2
by an internal
jumper.
Please note: For both alterations the device must
be opened, therefore only qualified service per-
sonnel may carry out the modifications concer-
ning the de-/activating of phantom powe
r.
General Note:
Use of 48 V or 24 V phantom power
(Phantom power = remote supply, here: pow-
ering an audio device via the connected audio
line)
Turn on the phantom power only if the unit
connected to an XLR socket that is designed to
handle it!
In general, suitable units are e.g. condenser
microphones, active DI-boxes and other special
audio devices, whose power supply is drawn
from the phantom power. Such devices are also
labelled accordingly; please heed the permissib-
le power consumption (max.10mA).
High-quality dynamic microphones with a ba-
lanced signal need no phantom power, but can
handle it anyway.
Other devices, which have not been designed
explicitly for phantom power operation, can suf-
fer from considerable malfunctions and damage
may result as well.
Examples of devices that may be damaged
by incorrect application of phantom power
include:
Low-cost dynamic microphones with a mono
jackplug (unbalanced signal) that were fitted
afterwards with an XLR connector.
Audio devices with a balanced XLR output (e.g.
DI-boxes, effects devices, instrument preamps
with a DI output etc.) which are not protected
against phantom power applied to their XLR
output. (The DI connectors on AER products are
protected against applied phantom power.)
Other audio devices (such as preamps, effects
pedals etc.) whose unbalanced line output was
replaced by an XLR socket.
If in doubt please consult the manufacturer of
the device you are using.
5.2 Effects
The
Alpha
has a built-in (internal) reverb-effect. The
efx-level
-control determines the intensity of the
internal effects (left stop = no effect).
Furthermore an additional effects unit (external
effect) may be connected to the
Alpha
. For this
purpose use the
send
and
return
sockets on the
rear side of the amplifier (
send
goes to
input
,
return
to the
output
of the external effects device).
The intensity of the effect is adjusted at the external
effects unit. The external effect loop works „parallel“,
the effect is blended with the original signal.
We wish you lots of fun playing your
Alpha
!
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