ENGLISH
6
AVT150/AVT150H & AVT275 Front Panel Features
8 Bright Switch
Most of the Gain controls in classic
Marshall amps have been fitted with what is
known as a ‘treble bleed capacitor’. This
device allows extra high frequencies to be
‘bled’ through to the drive section when the
Gain control is at low settings. Engaging the
Bright Switch will ‘bleed’ extra high frequencies
into the drive stage of the Clean channel,
giving you a bright, clean tone perfect for many
styles, including funk and country.
The higher the Gain control is set, the less
effect the ‘treble bleed capacitor’ has. As a
result, at maximum Gain settings, the bright
switch will have no audible effect at all.
9 Clean Volume Control
As its name suggests, this control
determines the volume of the clean channel.
The actual setting you choose will be
dependent on how loud you want the channel
to be, and also on the type of sound you have
selected on the pre-amp. Due to the
remarkable realism of our Advanced Valvestate
Technology, once the Volume control is turned-
up past a certain point the preamp will start to
push the power amp section into creating its
own, desirable distortion - just like an all-valve
Marshall amp. When this occurs, the AVT’s
power amp will start to add musical harmonics,
compression and ‘break-up’ into your sound.
Note:
As each channel has its own volume
control, you can easily balance the levels of all
four channels as you so desire. Once set to
your satisfaction, these controls can be left
alone and you can use the amp’s Master
Volume knob (20) to set your overall volume
level.
10 Clean Tone Controls
The Clean channel is equipped with rotary
Bass, Middle, and Treble controls. These three
passive EQ controls are designed to achieve
maximum tonal variation from your AVT
amplifier and, just like the tone controls on our
famous all-valve amps, are highly inter-
dependent on each other. As a result, the way
each one functions depends on the exact
position of the other two controls. This is
especially true of the Bass and Treble controls
in relation to the Middle control. As you will
discover, the lower the Middle control is set, the
more ‘reactive’ the others become.
As tone is very much down to personal
taste, experimentation and experience is
probably the best way of learning how these
three controls will affect your sound. To offer
you some guidance, suggested settings are
shown later on in this manual.
Points to remember are:
When selecting a sound on any amp:
a) The tone and output level coming out of
each guitar is as widely variable as guitars
themselves. Remember, guitars and also
pickups are not designed (nor intended) to be
equal. Therefore, amp settings will vary to suit
both your guitar and your playing style, and by
necessity, are at your discretion.
b) The tone of your sound is also
dependent on the way you set-up the Volume,
Gain and Tone controls of your amp. Taking
the time to adjust them to taste will further
enhance the sonic textures of your AVT. As is
true of all the best things in life, it is worth
investing some time playing around until you
find the desired sweet spot!
Note:
The amp’s Master Presence control (21)
affords you further adjustment of the high end.
11 OD1 Channel Select Switch
Pressing this front panel switch selects the
Overdrive 1 (OD1) channel of your AVT.
12 OD1 Gain Control
This rotary control can be best described
as the ‘sonic brain’ of the OD1 channel. Lower
Gain settings will produce well-defined, natural
sounding overdrives which have a nice ‘cut,’
making them perfect for funky, blues rock.
Higher gain settings will see the sound start to
get more ‘rounded’ as the AVT’s pre-amp valve
is pushed into saturation.
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