Ashdown Engineering Head Of Doom GEEZER BUTLER Bedienungsanleitung Seite 5

This function may also be controlled from the Ashdown 4
way footswitch. For the footswitch to operate this button
must be in its OUT position.
9 BAND EQUALISATION - This consists of BASS, MIDDLE and
TREBLE controls with three sliders placed between each
control. This can be used in a number of ways:
Firstly as a very simple Bass, Middle and Treble tone
control section as found on older traditional amplifiers. This
is done by leaving
The two sets of sliders interposed between these controls
set in their centre positions and using only the BASS,
MIDDLE and TREBLE controls to alter the overall tone.
Secondly, if more control is required then the sliders
can also be used to tailor the E.Q. In the regions between
the main tone controls. This provides a very versatile
Equalisation section, it is simple to understand and operate,
yet provides a wide degree of variation. It retains the
simplicity of a three- control tone section but provides the
flexibility of a graphic equaliser.
SUB HARMONICS - This section produces Sub Harmonics
an octave below the notes being played. The level of these
Sub Harmonics relative to the straight bass sound can be
adjusted using the LEVEL control.
This is very effective in thickening the sound and you will
find in use that only a small degree of this lower octave is
required to really fill out the sound and provide a character
that is not possible by any other means.
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The degree of Sub Harmonics is also dependant on the setting
of the BASS control.
DIRECT INJECT (D.I.) - A balanced D.I. Is provided on a
latching XLR socket. This has a push button placed below
it that allows the user to choose either a Pre E.Q. Signal
(button pushed IN) or a Post E.Q. Post Sub and effects signal
(button OUT).
The output signal from this XLR socket is set to a level
and impedance suitable for connecting directly into the
Microphone input of a mixing desk for either Direct Injection
into the PA system or for recording. This must ONLY be used
into a Balanced Microphone input, it is not intended for any
other type of connection.
This has a floating ground that is referenced to the mixing
console it is plugged into and should not need ground lifting.
It is also unaffected by Phantom Powering on the Microphone
input. Make sure your XLR plug does not have the shell of the
plug internally connected to signal ground or this will connect
the system to chassis ground of the ABM and may cause
problems with hum.
PUSH TO MUTE - When pushed IN this button mutes the output
from the preamp to the power amp, mutes the output from
the D.I. Socket and mutes the output from the LINE Out socket
as well. This leaves the output from the TUNER socket still
available to allow muted tuning. A purple LED is provided
next to this switch to indicate when the amplifier is muted.
This function operates only from the front panel MUTE push
switch. i.e. pressing this button mutes all sound from the