Mesa/Boogie CALIFORNIA TWEED 6V6 4:Forty Owner's Manual
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Mesa/Boogie CALIFORNIA TWEED 6V6 4:Forty Owner's Manual

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Summary of Contents for Mesa/Boogie CALIFORNIA TWEED 6V6 4:Forty

  • Page 1 Owner’s Manual...
  • Page 2 Hello from the Tone Farm Congratulations on your choice of the CALIFORNIA TWEED™ and welcome to the MESA/Boogie® Family! The model you’ve selected has a deep heritage that combines the best attributes of vintage tube amplification with pioneering innovation to arrive at a new realm of performance.

  • Page 3: Table Of Contents

    Table of Contents PRECAUTIONS OVERVIEW ____________________________________________________________________________________ 1-2 GETTING STARTED ______________________________________________________________________________ 3 HELPFUL HINTS ________________________________________________________________________________ 4 FRONT PANEL INPUTS ________________________________________________________________________________________ 5 GAIN _________________________________________________________________________________________ 5-6 TREBLE _______________________________________________________________________________________ 6 MID __________________________________________________________________________________________ 6-7 BASS _________________________________________________________________________________________ 7-8 PRESENCE _____________________________________________________________________________________ 8 MASTER ______________________________________________________________________________________ 8-9 REVERB _______________________________________________________________________________________ 9 POWER SELECT ______________________________________________________________________________ 9-10 POWER _______________________________________________________________________________________ 10 STANDBY _____________________________________________________________________________________ 10...
  • Page 4 Make certain grounding conforms with local standards. YOUR AMPLIFIER IS LOUD! EXPOSURE TO HIGH SOUND VOLUMES MAY CAUSE PERMANENT HEARING DAMAGE! Your Mesa/Boogie Amplifier is a professional instrument. Please treat it with respect and operate it properly. READ AND FOLLOW INSTRUCTIONS OF PROPER USAGE.

  • Page 5: Overview

    Operating Instructions OVERVIEW Congratulations on your choice of the California Tweed 6V6 4:Forty and welcome to the MESA/Boogie Family. You chose wisely ™ ® as this amplifier, though simple and straightforward in comparison to our Channel Switching multi-Channel models, represents no less commitment to excellence, attention to detail and refinement in performance.
  • Page 6 Five Power Ratings Featuring 2 Operating Classes and 3 Wiring Options are provided; 40 Watts utilizing 4 x 6V6s operating in Class AB Pentode, 30 Watts utilizing 4 x 6V6s; 2 operating in Class AB Pentode, 2 in Class AB Triode, 20 Watts running 2 x 6V6s operating in Class AB Pentode, 10 Watts running 2 x 6V6s operating in Class AB Triode and 2 Watts harnessing 2 x 6V6s operating in Class A Parallel, 1 6V6 wired Pentode, 1 wired Triode.

  • Page 7: Getting Started

    GETTING STARTED 1. After unpacking the amplifier, check to make sure all the tubes are firmly seated in their sockets as some may have loosened a bit during shipping. 2. Connect the A.C. Cord to a grounded (3 pin) A.C. outlet. 3.

  • Page 8: Helpful Hints

    HELPFUL HINTS NOTE: REDUNDANT INFORMATION: Throughout this Operating Guide you may encounter redundant information and sections that are repeated for your continued awareness and as reminders. This is done so a person can read only the sections they are interested in, and yet still get the important points they should know or NEED to know about the California Tweed. We apologize if this gets annoying for the cover-to-cover reader, but even they may appreciate it sometime in the future when referencing this Guide quickly for a specific topic.

  • Page 9: Front Panel

    FRONT PANEL INPUTS Two INPUTS are provided on the California Tweed to allow for different gain levels, pickup output levels and Tone. NORMAL is the “full strength Input and allows the full signal of your instrument to hit the first stage of the preamp. This Input allows more touch sensitive transitioning between clean and overdriven sounds when the GAIN control is set above 11:30 or 12:00, depending on your pickup’s output.

  • Page 10: Treble

    The highest region of the GAIN control (2:00 – 5:00) is all about saturation. Up here the signal gets much fatter in the low end and the top end begins to recede to create a rounder, more compressed sound. Dynamics become a little slower with lower peaks that are smoothed a bit and a more liquid feel is produced.

  • Page 11: Bass

    controls’ spectrum and chording sounds start to chime and slash with a more forward and very present character. From there on up (1:00–5:30) the MID introduces an aggressive range of sounds that are still full, but quite forward as the dominant frequencies become those present under control of the MID.

  • Page 12: Presence

    common sense approach; as GAIN goes up - BASS should come down, you’ll find great sounds easily and quickly. Example: • With the GAIN at 12:00 – BASS at 1:00 • With the GAIN at 1:00 – BASS at 12:00 •...

  • Page 13: Reverb

    right in the middle of your amplifier. Try to use processors of good quality that utilize good input and output circuitry as well as effects processor(s) or engines. Some purists like to run the MASTER all the way up and raise the GAIN until they reach their desired sound. The thinking there is that this scenario achieves the purest sound.

  • Page 14: Power

    as simple as a quick flick of the wrist. It opens up the usefulness and flexibility of a Single Channel traditional amplifier and allows a much wider range of sounds based on power section performance and saturation. Five Power Ratings Featuring 2 Operating Classes and 3 Wiring Options are provided; •...

  • Page 15: Rear Panel

    6 V 6 6 V 6 NORMAL POWER 4:FORTY INPUT STANDBY ™ REAR PANEL tweed ™ CALIFORNIA TWEED ™ HAND-WIRED VACUUM TUBE IN PETALUMA, WARNING: AMPLIFIER CALIFORNIA, USA Unplug power before EFFECTS DYNA-WATT™ POWER SPEAKERS (USE SHIELDED CABLE) TUBE GUIDE servicing fuse or chassis 5 x 12AX7 POWER...

  • Page 16: Rev Ftsw (Reverb Footswitch Jack)

    Always use Shielded, high quality cables to connect your Processors to the Effects Loop. One way to check the quality of your Processors and also, match the Levels is this simple Test. Set up a sound without processors the Loop and listen to the sound and observe the feel. Insert your Processing into the Loop.
  • Page 17 California Tweed and hopefully it will reward you many times over for your initial investment and help you take your playing and musi- cal endeavors to exciting new heights. From all of us here at MESA/Boogie, Cheers and Enjoy! REST AREA...

  • Page 18: Factory Sample Settings

    FACTORY SAMPLE SETTINGS SWEET VINTAGE CLEAN GAIN TREBLE BASS PRESENCE MASTER REVERB MULTI-WATT ™ NORMAL POWER 4:FORTY INPUT STANDBY ™ tweed ™ CALIFORNIA TWEED HAND-WIRED ™ VACUUM TUBE IN PETALUMA, WARNING: AMPLIFIER CALIFORNIA, USA Unplug power before EFFECTS DYNA-WATT™ POWER SPEAKERS TUBE GUIDE MAX HEADROOM CLEAN...

  • Page 19: Factory Sample Settings

    FACTORY SAMPLE SETTINGS VINTAGE O.D. GAIN TREBLE BASS PRESENCE MASTER REVERB MULTI-WATT ™ NORMAL POWER 4:FORTY INPUT STANDBY ™ tweed ™ CALIFORNIA TWEED HAND-WIRED ™ VACUUM TUBE IN PETALUMA, WARNING: AMPLIFIER CALIFORNIA, USA Unplug power before EFFECTS DYNA-WATT™ POWER SPEAKERS TUBE GUIDE JAZZ CLEAN (USE SHIELDED CABLE)

  • Page 20: User Settings

    USER SETTINGS GAIN TREBLE BASS PRESENCE MASTER REVERB MULTI-WATT ™ 6 V6 6 V6 NORMAL POWER 4:FORTY INPUT STANDBY ™ tweed ™ CALIFORNIA TWEED HAND-WIRED ™ VACUUM TUBE IN PETALUMA, WARNING: AMPLIFIER CALIFORNIA, USA Unplug power before EFFECTS DYNA-WATT™ POWER SPEAKERS TUBE GUIDE (USE SHIELDED CABLE)
  • Page 21 USER SETTINGS GAIN TREBLE BASS PRESENCE MASTER REVERB MULTI-WATT ™ 6 V6 6 V6 NORMAL POWER 4:FORTY INPUT STANDBY ™ tweed ™ CALIFORNIA TWEED HAND-WIRED ™ VACUUM TUBE IN PETALUMA, WARNING: AMPLIFIER CALIFORNIA, USA Unplug power before EFFECTS DYNA-WATT™ POWER SPEAKERS TUBE GUIDE (USE SHIELDED CABLE)

  • Page 22: Tube Troubleshooting Guide

    DIAGNOSING PRE-AMP TUBE PROBLEMS: Because your amplifier is an all tube design, it is quite possible that you will at some point experience 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.
  • Page 23 TUBE NOISE & MICROPHONICS: 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 24: Speaker Hookup Guide

    MESA/Boogie amplifiers can handle 4 and 8 ohms effectively. Never run below 4 ohms in a tube amplifier unless you are absolutely certain that the system can handle it properly; this can cause damage to the Output transformer. A few amplifiers can handle 2 ohms effectively without damaging them ( for example the MESA’S Bass 400+ ).
  • Page 25 SPEAKER IMPEDANCE MATCHING & HOOK-UP GUIDE: (Continued) PARALLEL: When wiring in parallel, the resistance of the speakers decreases. Two 8 ohm speakers wired in ( hooked-up ) Parallel results in a 4 ohm load. It’s easy to calculate the effect of a resistive load when all the speakers are all the same resistance. It is really not suggested to wire different resistive load values in Parallel ( 8 and 4, 16 and 8 etc.
  • Page 26 WIRING SCHEMES...Amplifier to Speaker Cabinets SPEAKERS SPEAKERS 8 OHM 4 OHM 4 OHM 8 OHM 4 OHM 4 OHM 8 Ohm Cabinet 4 Ohm Cabinet SPEAKERS SPEAKERS 8 OHM 4 OHM 4 OHM 8 OHM 4 OHM 4 OHM 8 Ohm Cabinet 16 Ohm Cabinet SAFE MISMATCH SAFE MISMATCH...
  • Page 27 WIRING SCHEMES...Amplifier to Speaker Cabinets SPEAKERS 8 OHM 4 OHM 4 OHM 8 Ohm Cabinet 8 Ohm Cabinet PAGE 23...

  • Page 28: Tube Task Chart

    PAGE 24...

  • Page 29: Parts List

    PAGE 25...
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