Mesa/Boogie Big Block 750 manual

OO GI E B M ESA Owner's Manual[...]

G r eetings from the H ome of T one Congratulations on y our choice of the Big Block 750 as your B ass amplifier and welcome to the MESA/Boogie family! As a discriminating player you probably kno w that you have pur chased the most comprehensive instrument for amplifying Bass that is available. What you might not r ealize is that this entitles you [...]

PRECAUTIONS & W ARNINGS Your MESA/Boogie Amplifier is a professional instrument. Please treat it with respect and operate it properly. USE COMMON SENSE AND ALWAYS OBSERVE THESE PRECAUTIONS: YOUR AMPLIFIER IS LOUD! EXPOSURE TO HIGH SOUND VOLUMES MAY CAUSE PERMANENT HEARING DAMAGE ! No user serviceable parts inside. Refer service to qualified per[...]

FRONT P ANEL: REAR P ANEL: Precautions 0 Overview 1/2 INSTRUMENT INPUT 3 TUNER 3 CONTROLS: OVERDRIVE 3/4 GAIN 4 BASS 4/5 P ASSIVE MID 5 ACTIVE MID 5 FREQUENCY 6 TREBLE 6 MASTER 6 O.D.MASTER 7 POWER SWITCH 7 FUSE 8 A.C. RECEPT ACLE 8 GROUND LIFT /POST & PRE / DIRECT OUT : 8/9 EFFECTS LOOP: Send & Return 9 FOOTSWITCH 9 TUNER 10 SLA VE 10 SPEA[...]

Congratulations on your choice of the M-PULSE BIG BL OCK 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. W e feel conf[...]

P AGE 2 Overview: (Continued) Looking at the Front Panel, it is apparent how logically the controls are laid out before you, creating a simple and intuitive platform for expression. However , don’t let this simplicity deceive you as to the incredible shaping power of this preamp. The tone controls are voiced such that minimal shaping is needed to[...]

P AGE 3 FRONT PANEL CONTROLS: INPUT: This jack is the instrument INPUT which feeds the first tube in the all-tube preamp of the BIG BL OCK . It is set up with enough headroom to handle both passive and active style instruments. For active instruments you may find yourself running the GAIN control somewhere between 10:00 and 2:00 for optimum headroo[...]

FRONT PANEL CONTROLS: (Continued) OVERDRIVE: ( Continued) Note that the GAIN control is still active when the OVERDRIVE is switched into the signal path. The GAIN control is wired in series with the OVERDRIVE and therefore, it can be used to further fine-tune the amount of overdrive present in the mix. The ef fect of the GAIN control is more appare[...]

FRONT PANEL CONTROLS: (Continued) BASS: (Continued) This type of broad band, active rotary control makes it possible to achieve bass characteristics far beyond that of a conventional passive type control. It can increase the low end to an almost absurd level and with a flick of the wrist, dip it to near transitor radio skinniness. Needless to say ,[...]

FRONT PANEL CONTROLS: (Continued) FREQUENCY: This control determines the frequency range that the ACTIVE MID control will cut or boost. As mentioned earlier , it covers a broad range that sweeps from the low midrange region to the lower treble frequencies. The control sweeps from 200Hz on the low side to 2Khz on the high side - with 340 Hz riding t[...]

FRONT PANEL CONTROLS: (Continued) O.D. MASTER: This control, like the OVERDRIVE, is designed to help you think outside the box. It provides an independent volume control for the OVERDIVE mode, allowing you to preset the level of the overdriven sound and footswitch to it for specific parts. The O.D. MASTER is only active when the Footswitch is conne[...]

REAR PANEL CONTROLS: FUSE: This is the A.C. Mains Fuse for the BIG BL OCK 750. REPLACE ONL Y WITH A SLO-BLO TYPE FUSE OF THE PROPER RA TING. THIS IS EXTREMEL Y IMPORT ANT , AS THE BIG BL OCK 750 DRA WS A SUBST ANTIAL AMOUNT OF CUR- RENT A T HIGH OUTPUT LEVEL SETTINGS. FUSE rating for USA - 15A S.B. / 120 V olts.FUSE AC RECEPTACLE: The removable “[...]

REAR PANEL CONTROLS: (Continued) GROUND LIFT / POST & PRE / DIRECT OUT: (Continued) PRE gives you just the sound of your instrument and no BIG BL OCK 750 enhancement so that an engineer can create their own sound with your unprocessed signal at the console. This is very handy for sound reinforcement applications as the sound you use on stage ma[...]

P AGE 10 REAR PANEL CONTROLS: (Continued) TUNER: This Rear Panel auxiliary TUNER output is wired in parallel with the Front Panel TUNER output. This provides for Rear Panel interfacing of rack mount tuners, where it is preferable to have all wiring stay in the rear of a rack system. The Footcontroller MUTE switch activates the MUTE feature in both [...]

P AGE 1 1 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 P ASSIVE-MID ACTIVE-MID FREQUENCY INPUT TUNER MUTE E N G I N E E R I N G OVERDRIVE GAIN BASS TREBLE MASTER O.D.MASTER OVERDRIVE 5 - ST AGE VACUUM TUBE AMPLIFIER 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 P ASSIVE-MID ACTIVE-MID FREQUENCY INPUT TUNER MUTE E N G I N E E R [...]

P AGE 12 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 P ASSIVE-MID ACTIVE-MID FREQUENCY INPUT TUNER MUTE E N G I N E E R I N G OVERDRIVE GAIN BASS TREBLE MASTER O.D.MASTER OVERDRIVE 5 - ST AGE VACUUM TUBE AMPLIFIER 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 P ASSIVE-MID ACTIVE-MID FREQUENCY INPUT TUNER MUTE E N G I N E E R I[...]

DIAGNOSING PREAMP TUBE PROBLEMS: At some point it is quite possible that you will experience some kind of minor pre-amp tube noise. Rest assured - this is no cause for alarm and you can take care of the problem yourself in a matter of minutes by simply swapping tubes. It is always a good idea to keep at least a couple of spare pre-amp tubes on hand[...]

P AGE 14 FRONT VIEW: Big Block 750 ALL FRONT PANEL KNOBS SAME part # REAR VIEW: Big Block 750 JACK pt# JACK pt# JACK pt# POT pt# POT pt# POT pt# POT pt# POT pt# LENSpt# 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 P ASSIVE-MID ACTIVE-MID FREQUENCY INPUT TUNER MUTE E N G I N E E R I N G OVERDRIVE GAIN BASS TREBLE MASTER O.D.MASTER OVERDRI[...]

The Spirit of Art in Technology OO GI E B M ESA Thank you for trusting MESA/Boogie to be your amplifier company and we wish you many years of toneful enjoyment from this handbuilt all tube instrument.[...]

The Spirit of Art in Technology 1317 Ross Street Petaluma, CA 94954 USA (707) 778-6565 FAX NO. (707) 765-1503[...]