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AVT150/AVT150H & AVT275 Front Panel Features 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.
13 OD1 Scoop Switch
Fine tuned to create the most awesome
mid ‘scoop’ imaginable, OD1's Scoop circuitry
is more than just a pre-set middle control.
Instead it actually reconfigures the whole post-
EQ voicing of the channel - from low to high.
Because of this, even though the resulting
‘scooped’ sound that occurs when the switch is
activated (pushed ‘in’) is totally extreme, the
channel's overall tone still remains tight and
focused.
14 OD1 Volume Control
As its name suggests, this control
determines the volume of the OD1 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 (i.e. high Gain settings
will generate much more preamp output level
than lower, cleaner sounding Gain settings).
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 desirable ‘break-up’ to your sound.
As previously stated, each channel has its
own volume control so you can easily balance
the levels of all four channels. 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 to best suit each playing situation and
venue.
15 OD2 Channel Select Switch
This selects the Overdrive (OD2) channel
of your amp.
16 OD2 Gain Control
Cranking the OD2 Gain control will
unleash the most extreme gain levels ever
found on a Marshall Valvestate amplifier. The
higher settings of the OD2 gain control can be
likened to driving the front-end of an already
raging Marshall valve amp with a high gain,
overdrive stomp box. If you've already
experienced the tonal pleasure of ‘front ending’
a Marshall valve amplifier in this way, you will
appreciate the energy and dynamics of this
type of set-up!
Turning the OD2 Gain control clockwise
will see more of the already smouldering signal
being sweetly compressed and ‘rounded’ by
the unique characteristic of the AVT's Valve
Drive stage as it is driven over the top into total
saturation. This channel can also be as nasty
and ‘in-yer-face’ as you would like. Engaging
the OD2 ‘Scoop’ button (17) will take this
channel onto a new level of cranium crushing
crunch, perfect for modern (a.k.a. ‘nu’) metal.
17 OD2 Scoop Switch
As is true of the OD1 Scoop, this circuit
acts like an advanced, pre-set contour control
that not only ‘scoops-out’ the mids but also
shapes the highs and lows for a tight, focused
sound. Engaging OD2’s Scoop Switch loads
you up with a ‘bottom heavy’ sound perfect for
the de-tuned, high-gain aggression favoured by
many modern acts.
18 OD2 Volume Control
This control regulates the drive of the OD2
channel into the power stage of the amplifier,
hence controlling its output volume. You will
find that the louder you go, the looser the
bottom end of your sound will become. Having
said this, the closed-back cabinet design of
your AVT is such that it will deliver tight, well-
defined low end at much higher volumes than
any other ‘hybrid’ amplifier known to man.
