MHZ40C
From Jim Marshall
I would like to take this opportunity to personally congratulate you on
choosing this Haze amplifier from Marshall.
As a musician myself I fully understand the thrill and enjoyment of
playing live music - whether that be on a stage to thousands, or in
the bedroom to yourself - there’s nothing quite like it. I also
appreciate the need for high quality equipment that not only delivers
the sound you’re looking for, but that also has the dynamic
play-ability and feature set that separates a good amp from a truly
fantastic one.
With these ideals firmly in mind, I set the Marshall team the
challenge of turning them into a range of all-valve driven amplifiers
that would be affordable, portable and look the part too. I must say I
was delighted when they presented me with what has now become
the Haze Series. Using the latest technology and good old fashioned
craftsmanship, these amplifiers have squeezed pure Marshall tone,
custom designed digital effects and innovative footswitching
technology into both a compact 40W combo and 15W Ministack.
Perfect for either the gigging musician or those seeking their very
own valve Marshall stack at home.
As with all Marshall products, the Haze Series undergoes stringent
quality control checks throughout its meticulous construction,
ensuring that the end result is fit for purpose and continues the high
standards expected of a Marshall amplifier.
Whether this is your first ever Marshall or the latest addition to your
arsenal of amps, the versatility, response and tone of the Haze
Series will only add to the guitar playing pleasure you’re no-doubt
accustomed to.
I wish you every success with your new Marshall amplifier. Welcome
to the family...
Yours Sincerely,
Dr. Jim Marshall OBE
Overview
Presenting the Haze series – 40 Watt combo and 15 Watt
head. Developed and engineered in the UK, these two
channel valve amplifiers, inspired by the British tones of the
60s and 70s, provides that classic Marshall roar with a
modern edge.
The MHZ40C 40Watt combo offers a dedicated overdrive
boost and series effects loop in a classic top loading 1x12"
combo loaded with a Celestion Marquee (G12-66) speaker –
custom designed in partnership with Marshall.
The MHZ15 15 Watt head can be paired with the optional
cabinets MHZ412A and MHZ412B to form a valve powered
mini stack
The Basics
Mains Input & Fuse
Your amp is provided with a detachable mains (power) lead,
which is connected on the rear panel. The specific mains input
voltage rating that your amplifier has been built for is indicated
on the back panel.
WARNING: Before going any further, make sure your
amplifier is compatible with your electrical supply. If you have
any doubt, please get help from a qualified technician - Your
Marshall dealer can help you in this respect.
Getting Started & Powering Up
1. Make sure that the speakers/cabinet(s) are connected to
the correct impedance LOUDSPEAKER jack(s) on the rear
panel.
See the Speaker Output guides in this handbook for specifics
regarding impedance matching. When using an extension
cabinet make sure that you’re using a proper speaker cable.
Never use a screened (shielded) guitar cable for this purpose.
WARNING! Failure to do any of the above will damage
your amp.
2. Ensure that the two VOLUME controls on the front panel
are set to zero.
3. Connect the supplied mains (power) lead into the MAINS
INPUT on the rear panel first and then into an electrical outlet.
4. Plug your guitar into the INPUT jack socket on the front
panel.
5. Turn the front panel POWER switch on. The switch’s LED
will illuminate and then wait a couple of minutes.
The vintage voiced effects section stores its settings per
channel for instant recall and provides a choice of classic
echo, vibe or chorus alongside a reverb providing the warmth
and transparency of a spring tank.
The reverb and effects are routed in parallel to the direct
signal so that no degradation of the direct signal occurs. By
turning the special reverb level and effects depth pots to
minimum ‘past the click’ and bypassing the effects loop on the
MHZ40C, the effect section is true bypassed, mechanically
removing the circuit from the amplifier – leaving the Haze
amps with an all-valve signal path.
The correct value of mains fuse is specified on the rear panel
of the amplifier. NEVER attempt to bypass the fuse or fit one
of the incorrect value.
Haze 40 Only
6. After waiting, engage the STANDBY switch.
STANDBY Switch (17)
The Standby switch is used in conjunction with the Power
Switch (18) to ‘warm up’ the valves in the amplifier before
use and to mute the amplifier when required, such as when
you are changing guitars. When powering up the amplifier
we suggest engaging the Power Switch (18) first, leaving
the Standby switch in the ‘OFF’ position for two minutes to
allow the valves to heat up.
When switching the amplifier off, always disengage the
Standby Switch a couple of seconds prior to the main
Power Switch.
7. Your amp is ready to play.
ENGLISH
1
0 10OFFOFF MAX MAX0 100 100 100 100 10
0 100 10
EffectAdjustEffect DepthReverb LevelPresenceBassMiddleTrebleVolumeVolume Gain
Bright
Channel
Green - Echo
Orange - Vibe
Red - Chorus
Input
O
I
Off
On
Standby
Power
Overdrive EQ EffectsNormal
Boost Boost
00010
010
OFF
OFF
010
Haze 40 Watt combo front panel
ENGLISH
1 23 4 6 7 8 9 10 11 12 13 14 15 16 17 18
1. Input Jack Socket
Jack input for your guitar. You must always use a screened
(shielded) guitar cable and never use an unscreened
(unshielded) speaker cable. Also, this cable should be one of
good quality. If you are in any doubt regarding this, your
Marshall dealer will be more than happy to help and advise you.
2. Bright
Pushing this switch ‘in’ enables the Bright function. This
control works on both the Normal and Overdrive controls.
On the Normal channel the Bright works in the traditional way,
interacting with the Normal Volume control. At lower settings
the Bright has an increased effect which lessens as the
Normal Volume is increased.
On the Overdrive channel it adds a little extra bite to the
sound and works at all volumes.
Normal Channel
3. Boost
Pushing this switch ‘in’ enables the Boost function in the
Normal channel.
With the Boost off the sound remains cleaner for longer as the
Volume control is increased providing a greater range of clean
sounds.
With the Boost selected, the channel turns into a classic
Marshall Normal channel, starting clean with a thicker sound,
overdriving the power amp sooner and bringing out that
vintage Marshall non-master volume tone.
4. Volume Control
This control adjusts the volume of the Normal Channel. At low
levels the sound will be clean. As the volume control is
increased, in true Marshall style, the power amplifier will start
to overdrive giving a classic, controllable distortion which
cleans up beautifully from the guitar’s volume control.
5. Channel Switch
Selects between Normal (out) and Overdrive (in) channels.
Note: When using the 2-way footswitch this front panel switch
is disabled. When using the optional 4-way footswitch this
switch operates in ‘catch up mode’ - This top panel switch
must first match the current footswitch setting before it will
have an effect.
Overdrive Channel
6. Boost
Pushing this switch ‘in’ enables the Boost function.
5
With the Boost off the tone is a controlled, easy to play,
dynamic sound with plenty of scope available to clean up the
sound from the guitar volume control.
At lower volume settings, the sound is very much the classic
Marshall Master Volume sound. At higher volume settings,
this channel is brilliant at overdriving the power amp for some
truly inspiring tones.
Enable the Boost for a big step up in gain taking an
un-boosted rhythm sound into serious lead territory.
HINT - At higher volumes you’ll find you will need less preamp gain as the power amp starts to overdrive. Experiment to
find your favourite balance.
Note: When using the optional 4-way footswitch this switch
operates in ‘catch up mode’ - This top panel switch must first
match the current footswitch setting before it will have an
effect.
7. Gain
Controls the level of signal entering the pre-amp. At lower
settings the sound will be cleaner and the amount of distortion
is more controllable from your guitar or your playing style. At
higher settings, more distortion is available.
8. Volume
Controls the amount of signal fed to the power amp. At lower
settings, this will act as a volume control. At higher settings, it
will control the amount of power amp distortion.
EQ Section
The treble, middle and bass controls form a traditional
Marshall interactive EQ section – adjusting one control will
affect how the others work.
9. Treble
By adjusting the Treble control you can add or take away the
higher frequencies in your guitar tone. By increasing the
amount of treble you will make your tone brighter, ideal for
more percussive playing styles.
10. Middle
Adjusts the middle frequencies. Turning the control
anticlockwise will yield a more hollow sound with the bass and
treble frequencies appearing to be more accentuated. Turning
it back clockwise increases the middle adding body to the
sound.
11. Bass
Turning the Bass control will affect the amount of low
frequencies or bottom end in your guitar tone. Rotating this
clockwise will increase the amount of lower tones generally
making your bass sound deeper and is especially useful at
lower volumes. Turning this control anti-clockwise will reduce
the bass frequencies in your tone producing a more cutting
tone – especially useful at higher volumes.
12. Presence
This control emphasises the high frequencies in your tone.
Turning this control up (clockwise), adds crispness and bite.
Effects Section
All effect and reverb settings are automatically stored in
Normal, Overdrive and Overdrive Boost allowing you to set
different effects and/or reverb levels in each of these three
modes. Set a clean Normal sound with a lush chorus and a
huge reverb, change to Overdrive and set a sparse reverb
and a slap back echo and these sounds will be remembered
each time you change channel.
For this reason, the position of the effects controls will not
always show the effects settings in use. If one of the controls
is changed, the value will ‘jump’ to the control’s new position.
The Reverb Level and Effects Depth controls use special
controls that include switches that allow a part or all of the
section to be globally disabled.
Turn the Reverb Level to minimum ‘past the click’ and it will
globally disable the reverb.
Turn the Effect Depth to minimum ‘past the click’ and it will
globally disable the effects.
Turn both the Reverb and Effect Depth to minimum and the
entire effects section will be globally disabled. If the effects
loop is also turned off via the rear panel switch a further click
will be heard from within the amplifier as the effect section is
true bypassed mechanically removing the circuit from the
amplifier – leaving an all-valve amplifier signal path.
13. Reverb Level
This control sets the amount of signal sent to the reverb.
Turning the control down ‘past the ‘click’ to off globally
disables the reverb. However turning the control down to
minimum ‘before the click’ turns the reverb off for the current
channel only but does not globally disable the reverb.
When using the optional 4-Way footcontroller its Reverb LED
will turn off when the Reverb control is muted or turned to
minimum. The reverb cannot be footswitched when the control
is set to minimum or disabled. .
14. Effect Depth
This control sets the depth of the chorus and vibe or the level
of the echo.
Turning the control down ‘past the click’ to off globally disables
the effects and the light on the effect switch will turn off.
The effects cannot be footswitched while disabled.
15. Effects Adjust Control
This control allows you to adjust the modulation speed of the
Chorus and Vibe effects or the delay time of the Echo. As the
delay time is decreased so are the number of repeats –
creating long trailing echoes that reduce to short slap backs
and further down to double tracking.
When changing from a channel with Echo to one without, the
effect will naturally spill between channels. When changing
from a channel with Echo to a channel with Echo set to a
different delay time, the delay effect will not spill between
channels. The maximum delay time is 1 second.
16. Effects
Pressing this switch cycles between the 3 effects, Echo
(green), Vibe (orange) Chorus (red) and Off (no light). When
the effects are muted via the 2-way footswitch or optional
4-way footcontroller the light will slowly flash when the
selected effect is muted.
When using the optional 4-Way footcontroller its FX LED will
turn off when the effects are muted or set to off.
17. Standby
The Standby switch is used in conjunction with the Power
Switch (18) to ‘warm up’ the amplifier before use and to mute
the amplifier when required, such as when you are changing
guitars. When powering up the amplifier we suggest engaging
the Power Switch (18) first, leaving the Standby switch in the
‘OFF’ position for two minutes to allow the valves to heat up.
When switching the amplifier off, always disengage the
Standby Switch a couple of seconds prior to the main Power
Switch.
18. Power Switch
This is the On/Off switch for the mains electric power to the
amplifier. The LED will light up when your amplifier is turned
on and will not be lit when the amplifier is switched off.
Note: Please ensure the amplifier is switched off and
unplugged from the mains electricity supply whenever it is
moved!
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