OOGIE
B
M
ESA
Owner's Manual
Page 1: ...OOGIE B MESA Owner s Manual...
Page 2: ...have purchased the most comprehensive instrument for amplifying Bass that is available What you might not realize is that this entitles you to all the experience resources and commitment our twenty fi...
Page 3: ...splashing water Do not place objects filled with liquids on or nearby the amplifier WARNING Always make certain proper load is connected before operating the amplifier Failure to do so could pose a s...
Page 4: ...N 4 BASS 4 MID 5 TREBLE 5 DI LEVEL 6 MASTER 6 PARAMETRIC EQUALIZER 6 7 FREQUENCY CONTROLS 7 FUSE 8 A C RECEPTACLE 8 DIRECTOUT Post Pre Ground Lift XLR Jack 8 EFFECTS LOOP Send Return 9 SPEAKER OUTPUT...
Page 5: ...f shaping power for bass The signal path begins with the Input jacks and both ACTIVE and PASSIVE instruments have been provided for with a dedicated jack The front end GAIN control determines the amou...
Page 6: ...ondition and in fact produce more than its rated power it is not recommended Prolonged use of a 2 Ohm load will cause the power mosfets to run hot causing the protection circuit to trigger and mute th...
Page 7: ...Hopefully these hints have helped get you up and running with your newWalkAbout and you are well on your way to having the best tone you have ever heard Now that you have a better idea of the layout...
Page 8: ...tioned earlier in the Helpful Hints section the BASS control is an active shelving type as opposed to a passive style control This means that a center Q point has been chosen and this control allows y...
Page 9: ...or either cut or boost As the control is increased past 12 00 it produces a 6db per octave rise in gain starting at 723Hz until 20db is reached From this point gain remains constant at 20db for all fr...
Page 10: ...from subtle enhancement to extreme notching or boosting is possible with the only limit being your imagination As mentioned earlier the EQ is an in line type which means that it is in the signal path...
Page 11: ...control range For example the 60Hz band can be set to focus on frequencies between 30Hz and 300Hz with 60Hz being the control Center at 12 00 straight up The 340Hz band is especially powerful as it c...
Page 12: ...UND LIFT DIRECT OUT POST PRE EFFECTS LOOP WARNING To reduce risk of fire or electric shock replace fuse with same type and rating only Do not expose this unit to rain or moisture WARNING To reduce ris...
Page 13: ...the signal path Sometimes it may also be necessary to lift theA C Cable Ground also by using a 3 2 ground adapter to achieve a quiet signal path NOTE Ground loops can occur in many places in a comple...
Page 14: ...TRIC EQUALIZER 30 300 200 2K 1 2K 12K 15 15 TREBLE DI LEVEL MASTER INSTRUMENT INPUTS PASSIVE ACTIVE ON POWER E N G I N E E R I N G GAIN BASS MID FOUR STAGE VACUUM TUBE PREAMPLIFIER S I M U L S T A T E...
Page 15: ...0 0 60 Hz 340Hz 2K PARAMETRIC EQUALIZER 30 300 200 2K 1 2K 12K 15 15 TREBLE DI LEVEL MASTER INSTRUMENT INPUTS PASSIVE ACTIVE ON POWER E N G I N E E R I N G GAIN BASS MID FOUR STAGE VACUUM TUBE PREAMP...
Page 16: ...e minor pre amp tube problems can take many forms but can generally be described in two catego ries Noise and Microphonics Noise can be in the form of crackling sputtering white noise hiss and or hum...
Page 17: ...The Spirit of Art in Technology OOGIE B MESA 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...
Page 18: ...The Spirit of Art in Technology 1317 Ross Street Petaluma CA 94954 USA 707 778 6565 FAX NO 707 765 1503...
