MB450H, MB4210 & MB4410 Front Panel Features
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MB60 & MB150 Front Panel Features
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with the Middle control. It adjusts the centre
frequency where the Middle control takes affect.
1. INPUT Jack Socket
10. MODERN / CLASSIC Switch
14. BASS Control
Jack input for your bass guitar. Use a good quality
guitar cable (i.e. one that’s screened/shielded) to
help prevent noise, interference and unwanted
feedback.
This push switch allows you to change between the
amp’s two channels, Modern and Classic, via the
front panel. When this switch is ‘out’ the Modern
Channel is engaged and the LED is green. Pushing
it ‘in’ switches to the Classic Channel and the LED
changes to red.
Turning the Bass control will affect the amount of
low frequencies or bottom end in your bass guitar
tone. Rotating this clockwise will increase the
amount of lower tones generally making your bass
sound deeper. Turning this control anti-clockwise
will reduce the bass frequencies in your tone
producing a reduction in bottom end thud.
6. MIDDLE Control
The middle frequencies tend to effect the fatness or
body of the tone. The frequency of the middle band
is adjusted by means of the Mid Freq control.
Usually this control will be used to remove mids
rather than increase them making the bass sound
rounder and fuller. Increasing the mids usually
makes the bass sound ‘boxy’.
2. ACTIVE / PASSIVE Switch
This push switch allows you to change between
Active and Passive instruments. The gain is
reduced 6dB when in ‘Active’ position.
CLASSIC CHANNEL
The Classic channel presents gain worthy of the
greatest rock bass player and heavy tone that is
expected from a Marshall amp.
15. VOICE SHIFT Control
This 3 position control adjusts the overall tonal
voicing of the amplifier.
MODERN CHANNEL
7. TREBLE Control
The Modern channel hits those super crystal clean
notes when clarity is a must.
By adjusting the Treble control you can add or take
away the higher frequencies in your bass tone. By
increasing the amount of treble you will make your
tone brighter, ideal for more percussive playing
styles.
11. GAIN Control
Position 1 tailors the response of the amplifier for
smooth low end, restrained lower mids, and mild
high end lift, to give the classic vintage valve bass
tone.
This control sets the operating level of pre-amp. If
you require a clean bass sound turn this control up
until your bass just starts to distort and then back it
off slightly. If on the other hand you would like a
distorted sound, simply turn up the Gain control
and drive the ECC83 valve until the required
amount of distortion is achieved creating the warm
Marshall tone.
3. VOLUME Control - Modern Channel
This control adjusts the volume of the Modern
Channel.
In position 2 the lower mid is made more prominent
whilst simultaneously the upper mids are subtly
scooped to give a more aggressive, growling
quality to the amplifier's tone.
8. COMPRESSOR Switch & LED
4. BASS Control
This switch turns the Compressor control on and
off. When the switch is ‘in’ the Compressor control
is active and the LED will be illuminated green.
Turning the Bass control will affect the amount of
low frequencies or bottom end in your bass guitar
tone. Rotating this clockwise will increase the
amount of lower tones generally making your bass
sound deeper. Turning this control anti-clockwise
will reduce the bass frequencies in your tone
producing a reduction in bottom end thud.
12. BOOST Switch
Position 3 introduces a gentle overall mid boost for
an immediate, cutting, ‘in your face’ tone with the
mids scooped even further to give an immediate,
cutting sound.
9. COMPRESSOR Control
The Boost switch increases the gain of the classic
channel. When the switch is engaged the whole
channel gain is raised making it much easier to get
an overdriven sound.
The Compressor smoothes out your bass sound.
As you increase the amount of compression, so
you flatten out the peaks in the incoming signal.
When the compression reaches its threshold the
LED will change to red.
5. MID FREQUENCY Control
16. VOICE Control
Constitutes a semi-parametric equalizer together
13. VOLUME Control - Classic Channel
This control adjusts the volume of the Classic
Channel.
This control adjusts the response selected by the
Voice Shift control.
2
3
17. TREBLE Control
21. VOLUME - Master
3. FOOTSWITCH Jack Socket
Connect the supplied footswitch here. This enables
you to change between Modern and Classic
channels. The MB450H, MB4210 & MB4410 have
a twin footswitch which also switches the Blend
feature.
5. BALANCED LINE OUT
By adjusting the Treble control you can add or take
away the higher frequencies in your bass tone. By
increasing the amount of treble you will make your
tone brighter, ideal for more percussive playing
styles.
(Only on MB450H, MB4210 & MB4410)
Controls the overall volume.
The Line Out Jack can be used for connection to
recording equipment for direct recording or for
connection to a P.A. system.
22. CD IN Jack Socket
If you want to jam to your favourite CD, tape or
mp3 player, merely connect the headphone output
of your device here, adjust the player’s volume to
match that of your guitar and ‘hey-presto’ - you've
got the perfect ‘play-along’ practice system.
6. RETURN Jack Socket
This is where you connect the OUTPUT of the
effects processor you are using in the effects loop.
BLEND
4. PRE/POST Switch
(Only on MB450H, MB4210 & MB4410)
You can select a blend of the two channels either
from the front panel or via the supplied footswitch.
Selects the signal available at the Balanced line
out. When in PRE position the buffered and level
adjusted input signal is present at the DI output.
The signal before the Master potentiometer is
made available at this connector when in POST
position.
7. SEND Jack Socket
If you want to use an external effects processor in
your amp’s built-in Series FX effects loop, this is
the jack you connect to the INPUT of the unit you
are using.
23. HEADPHONES Jack Socket
18. BLEND Switch & LED
For use when silent practice is the order of the day.
Connection of headphones will automatically shut
down the internal speaker / speaker cabinet.
This switch turns the channel mixing on.
19. BLEND Control
Technical Specification
By adjusting this control it is possible to blend your
signal between the Modern and Classic channels.
When you do this the LED will be illuminated red.
24. POWER Switch
The power switch turns your amplifier on and off.
The LED next to the ‘Modern / Classic’ switch will
light up when your amplifier is turned on and will
not be lit when the amplifier is switched off.
MB450H
300W
450W
ECC83
1MΩ
MB4210
MB4410
300W
MB150
150W
MB60
60W
-
ECC83
1MΩ
Power (RMS) @ 4 Ohms
Power (RMS) @ 2 Ohms
Pre-amp Valve
Bass Guitar Input Impedance
CD Input Impedance
Emulated Output Level
Weight
300W
450W
450W
-
*
*
20. VOLUME Control - Blend
ECC83
1MΩ
ECC83
1MΩ
ECC83
1MΩ
Adjusts the volume of the Blend.
Note: The power amplifier is protected by a
clipping limiter, so even when you play your amp
loud, the sound remains clean.
10kΩ
+4dBu
10kΩ
10kΩ
10kΩ
10kΩ
+4dBu
33kg
+4dBu
51kg
+4dBu
30kg
+4dBu
23kg
15kg
Rear Panel Features
Size (mm) W, H, D
630 x 220 x 235
630 x 535 x 280
630 x 720 x 410
580 x 585 x 355
580 x 505 x 325
with extension cabinet
*
1. MAINS INPUT
2. SPEAKER OUT Socket(s)
Your amp is provided with a detachable mains
(power) lead, which is connected here.
There is one speaker jack socket on the MB60 and
MB150 (marked ‘INTERNAL 4Ω’). This is where the
power amplifier is connected to the internal
loudspeaker. It can be used to drive an external
cabinet of at least 4 Ohms impedance.
Safe operating levels: The MB450, MB4210 and MB4410 amplifiers are designed to deliver 450W safely into 2ohm loads.
However, impedances lower than 4 ohms together with high signal levels will produce more internal heating which may
trigger the thermal protective muting.
Note: The specific mains input voltage rating that
your amplifier has been built for is shown on the
back panel. Before connecting for the first time,
please ensure that your amplifier is compatible with
your electricity supply. If you have any doubt,
please get advice from a qualified technician.
Your Marshall dealer will help you in this respect.
There are 2 speaker jack/SPEAKON® combo
sockets on the MB450H, MB4210 and MB4410.
They accept either a standard 1/4" jack or a
SPEAKON® connector and both of them carry the
same signal allowing 2 cabinets to be connected
simultaneously. The minimum load is 2 Ohms.
EUROPE ONLY
- Note: This equipment has been tested and found to comply with the requirements
of the EMC Directive (Environments E1, E2 and E3 EN 55103-1/2) and the Low Voltage Directive in the E.U.
EUROPE ONLY - Note: The Peak Inrush current for the MB450H, MB4210 and MB4410 is 28 amps.
The Peak Inrush current for the MB150 is 30 amps.
Please ensure the amplifier is switched off and
unplugged from the mains electricity supply before
being moved.
The Peak Inrush current for the MB60 is 13 amps.
Follow all instructions and heed all warnings
KEEP THESE INSTRUCTIONS !
(panel shown is MB450H)
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Suggested Settings
Here follows some sample settings to act as starting points from which to develop your own sounds.
N.B. Volume should be adjusted to taste.
Jazz
OUT
Funk
IN
Classic Rock
OUT
Alternative Rock
IN
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