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FUSE:
This is the A.C. Mains Fuse for the BIG BLOCK 750. REPLACE ONLY WITH A SLO-BLO TYPE FUSE OF THE PROPER
RATING. THIS IS EXTREMELY IMPORTANT, AS THE BIG BLOCK 750 DRAWS A SUBSTANTIAL AMOUNT OF CURRENT AT
HIGH OUTPUT LEVEL SETTINGS.
FUSE rating for USA - 15A S.B. / 120 Volts.
A.C. RECEPTACLE:
The removable “Euro” Style” A.C. cord that is supplied with the BIG BLOCK 750 makes set-ups and tear-
downs after the gig a snap. It also makes de-racking much easier when you wish to remove the unit from a hardwired
rack system where all the A.C. cords have been cable-tied in. Additional heavy duty cords are available should you
ever need one...simply call us and we can ship one directly to you for a nominal charge, plus shipping cost. Make
sure the A.C. cord is firmly in its socket (receptacle) before powering up the amplifier.
NOTE: NEVER ALTER THE THREE PRONG POWER CORD IN ANY WAY.
GROUND LIFT, POST/PRE, DIRECT
This section captures the entire pre-amp signal including the Effects Loop and allows you
to send a Balanced signal to either a House Main Board or a Recording console. There are four elements to this circuit which are; (1)
a male XLR jack, (2) a LEVEL control, (3) a POST / PRE switch and (4) a GROUND LIFT switch. Here are their functions and how
to use them.
LEVEL: This rotary control allows you to set an appropriate level for the Direct Signal
to match the input sensitivity of the console. It is always best to start with the LEVEL
control zeroed-out before connecting a cable to the DIRECT output. This practice will
help to avoid accidental damage to the speakers or your engineer’s ears from too hot
a setting upon hitting your first note.
POST / PRE: This switch lets you choose the type of signal you wish to send to the
console. POST gives you the entire sound of the pre-amp with the Parametric EQ,
Compressor and the Effects Loop (including processing from anything in the loop).
reAr PANeL CONTrOLS:
CAUTION:Unplug power
before removing fuse or
bolts holding chassis
F
U
S
E
F
U
S
E
POWER FUSE
15A
SLO
BLO
120 V~
60 Hz
15 A
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
POST PRE
HANDBUILT IN PETALUMA , CALIFORNIA
DIRECT OUTPUT
LEVEL
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
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