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Congratulations on your choice of the M-PULSE BIG BLOCK 750 as your amplifier and welcome to the MESA/Boogie Family!
First we would like to thank you for choosing us as your amplifier company. This is something we never take for granted and you will
come to find that we are here to help you sound your best should you ever need help. We feel confident that your new amplifier will
bring you many years of rewarding inspiration and create for you a newfound freedom to express through your music.
This mighty powerhouse joins the innovative band of M-PULSE hybrid bass amplifiers as the heavyweight king of headroom with its
urgent big venue tone. It represents the ultimate marriage of simplicity and versatility and will surprise you daily with its fundamental
musicality and tone.
The BLOCK stands firmly on the same soulful sounding ground as all M-PULSE amplifiers, with architecture based on our 30
years of all-tube preamp experience and Simul State™ Power - which utilizes a tube driver stage feeding a bank of custom de-
signed mosfet output devices. This design seamlessly integrates the best sonic qualities of old-world tube circuitry and modern high
power mosfet technology to arrive at a stunning blend that is both musical and powerful. In the BIG 750’s case, that is doubly true.
This monolith of tone puts, at your immediate disposal, ridiculous amounts of transient handling current produced by the 12 heavy
duty custom designed mosfet devices. This means when you want to say something with your instrument, your voice will be heard
with accuracy, both harmonically and in the time domain. Every bassist knows how important that is!
AC OFF
S I M U L S T A T E B A S S A M P L I F I E R
TM
PASSIVE-MID ACTIVE-MID FREQUENCY
FRONT VIEW: Big Block 750
INPUT TUNER
OVERDRIVE
GAIN
BASS
TREBLE MASTER
O.D.MASTER
OVERDRIVE
5 - STAGE VACUUM TUBE AMPLIFIER
CAUTION
:
Unplug power
before removing fuse or
bolts holding chassis
POWER FUSE
15A
SLO
BLO
120 V~
60 Hz
15 A
F
U
S
E
F
U
S
E
GROUND
LIFT
EFFECTS
SPEAKER
OUTPUT
RETURN SEND
SUGGESTED LOAD
2 OHMS MINIMUM
REAR VIEW: Big Block 750
HANDBUILT IN PETALUMA , CALIFORNIA
SIMUL STATE BASS AMPLIFIER
TUBE DRIVEN-MOSFET POWER
M-PULSE BIG BLOCK 750
POST PRE
DIRECT OUTPUT
LEVEL
FOOT
SWITCH
SLAVE
LEVEL OUT
TUNER
PASSIVE
ACTIVE
Overview:
Operating Instructions
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