Mesa/Boogie WalkAbout Owner's Manual
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Mesa/Boogie WalkAbout Owner's Manual

Bass amplifier
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Summary of Contents for Mesa/Boogie WalkAbout

  • Page 1 OOGIE Owner's Manual...
  • Page 2 Greetings from the Home of Tone Congratulations on your choice of the WalkAbout as your Bass amplifier and welcome to the MESA/Boogie family! As a discriminating player you probably know that you have purchased the most comprehensive instrument for amplifying Bass that is available.
  • Page 3 PRECAUTIONS & WARNINGS 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: WARNING: EU: permission from the Supply Authority is needed before connection. WARNING: Vacuum tube amplifiers generate heat. To insure proper ventilation always make certain there is at least four inches (100mm) of space behind the rear of the amplifier cabinet.

  • Page 4: Table Of Contents

    Table of Contents Precautions Overview Instant Gratification Helpful Hints FRONT PANEL: Instrument Inputs: ACTIVE & PASSIVE CONTROLS: GAIN BASS TREBLE DI LEVEL MASTER PARAMETRIC EQUALIZER FREQUENCY CONTROLS REAR PANEL: FUSE A.C. RECEPTACLE DIRECTOUT: Post / Pre - Ground Lift - XLR Jack EFFECTS LOOP: Send &...

  • Page 5: Overview

    OVERVIEW: Congratulations on your choice of the M-Pulse WalkAbout Bass Amplifier! This compact and powerful little brother to the M-Pulse 600 and 360 delivers all the tone and most of the features in a package thats bound for the open road.

  • Page 6: Instant Gratification

    1. Connect your A.C. Power Cable to a grounded outlet. Avoid ground lifts (3 to 2 prong adapter) whenever possible. 2. The optimum speaker load for your WalkAbout is 4 Ohms. You may use a cabinet (s) of a higher rating safely (8 Ohm) with no degradation in tone, however the amplifier will not produce its full rated wattage.

  • Page 7: Helpful Hints

    Many times (but not all) the hum is created by a ground loop between the WalkAbout and the console and lifting the WalkAbout chassis to circuit ground will remedy the situation.

  • Page 8: Gain

    FRONT PANEL CONTROLS: (Continued) GAIN: This control determines the overall character of the input sensitivity. The lower regions of the control (below 12:00) lend greater headroom and provide a scooped, brighter personality. The upper harmonics come through more prominently in this area of the control making the top end sound more transparent and sweet.

  • Page 9: Mid

    This active shelving TREBLE control completes the rotary tone control string to create a powerful and extremely accurate network to use as your fundamental platform. It’s no wonder many first time WalkAbout players make the comment that just these controls combined with the GAIN create the best tone they have ever heard! NOTE: As with the BASS control, may we remind you that a control of this type with its increased power should be used with finesse.

  • Page 10: Di Level

    POWER MASTER: This basic control determines the overall final output level of your WalkAbout so that you can adjust the front end GAIN control to your tonal needs and then push the SIMUL-STATE power section to the desired listening level.

  • Page 11: Parametric Equalizer

    NOTE: May we again humbly suggest using the PARAMETRIC EQ to fine-tune your sound with subtle adjustments. Much like a car with an engine capable of ridiculous speeds, the WalkAbout incorporates this shaping device capable of ruining a great tone in the hands of the unwary driver.

  • Page 12: Rear Panel

    E N G I N E E R I N G FUSE: This is the A.C. Mains Fuse for the WalkAbout REPLACE ONLY WITH A SLO-BLO TYPE FUSE OF THE PROPER RATING. THIS IS EXTREMELY IMPORTANT, AS THE WalkAbout DRAWS A SUBSTANTIAL AMOUNT OF CURRENT AT HIGH OUTPUT LEVEL SETTINGS.

  • Page 13: Effects Loop: Send & Return

    The WalkAbout provides two 1/4 inch speaker jacks for powering speaker enclosures. The recom- mended speaker load impedance for the WalkAbout is 4 Ohms, at which the mighty SIMUL STATE power section is capable of delivering a whopping 300 watts RMS before clip and peaks of over 400 watts! A speaker load of 8 Ohms...

  • Page 14: Factory Sample Settings

    FACTORY SAMPLE SETTINGS Huge & Round (Parametric EQ Optional) ACTIVE E N G I N E E R I N G S I M U L S T A T E B A S S A M P L I F I E R 0 db INSTRUMENT INPUTS...

  • Page 15: Personal Settings Page

    PERSONAL SETTING PAGE ACTIVE E N G I N E E R I N G S I M U L S T A T E B A S S A M P L I F I E R 0 db INSTRUMENT INPUTS 60 Hz...

  • Page 16: Tube Noise And Diagnosing Pre-Amp Tube Problems

    DIAGNOSING PRE AMP TUBES: You may occasionally experience some form of tube noise or microphonics. Certainly no cause for alarm, this quirky behavior comes with the territory and the Tone. Much like changing a light bulb, you don’t need a technician to cure these types of minor user serviceable annoyances and in fact, you’ll be amazed at how easy it is to cure tube problems...by simply swapping out a pre-amp or power tube! First may we suggest that you set the amplifier up on something so that you can get to the tubes comfortably without having to bend...

  • Page 17: Parts Sheet

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

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