17. TREBLE Control
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.
BLEND
(Only on MB450H, MB4210 & MB4410)
You can select a blend of the two channels either
from the front panel or via the supplied footswitch.
18. BLEND Switch & LED
This switch turns the channel mixing on.
19. BLEND Control
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.
20. VOLUME Control - Blend
Adjusts the volume of the Blend.
21. VOLUME - Master
(Only on MB450H, MB4210 & MB4410)
Controls the overall volume.
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.
23. HEADPHONES Jack Socket
For use when silent practice is the order of the day.
Connection of headphones will automatically shut
down the internal speaker / speaker cabinet.
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.
Note:
The power amplifier is protected by a
clipping limiter, so even when you play your amp
loud, the sound remains clean.
(panel shown is MB450H)
Rear Panel Features
1
2
3
4
5
6
7
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.
The Peak Inrush current for the MB60 is 13 amps.
ENGLISH
ENGLISH
MB450H
MB4210
MB4410
MB150
MB60
Power (RMS) @ 4 Ohms
300W
300W
300W
150W
60W
Power (RMS) @ 2 Ohms
450W
450W
*
450W
*
-
-
Pre-amp Valve
ECC83
ECC83
ECC83
ECC83
ECC83
Bass Guitar Input Impedance
1MΩ
1MΩ
1MΩ
1MΩ
1MΩ
CD Input Impedance
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
Emulated Output Level
+4dBu
+4dBu
+4dBu
+4dBu
+4dBu
Weight
15kg
33kg
51kg
30kg
23kg
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
Your amp is provided with a detachable mains
(power) lead, which is connected here.
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.
Please ensure the amplifier is switched off and
unplugged from the mains electricity supply before
being moved.
2. SPEAKER OUT Socket(s)
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.
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.
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.
4. PRE/POST Switch
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.
5. BALANCED LINE OUT
The Line Out Jack can be used for connection to
recording equipment for direct recording or for
connection to a P.A. system.
6. RETURN Jack Socket
This is where you connect the OUTPUT of the
effects processor you are using in the effects loop.
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.
5
4
Technical Specification
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.
Follow all instructions and heed all warnings
KEEP THESE INSTRUCTIONS !
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