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  1. MESA/Boogie Support
  2. Frequently Asked Questions

Frequently Asked Questions

  • Amplifiers

    • ★ When was my amp made?
    • Does my JP-2C have the loop update?
    • How are the Tubes arranged in a Simul-Class 2:90 - I vs. II?
    • How can I learn more about a product Out of Production?
    • How can I tell which version Dual Caliber - DC Series amp I have?
    • How can I tell which version Single Rectifier amp (Solo 50, Rect-O-Verb 50) I have?
    • How can I update the MIDI software for my JP-2C?
    • How can I update the MIDI software for my Triple Crown TC-50?
    • How do the External Switching Jacks work on the Mark V?
    • How does the Program/Channel button work on a TriAxis?
    • Is my Mark II a Mark IIC+?
    • Is my Mark IV an A or B model?
    • Can a MESA Stereo Power Amp be run Mono?
    • What features distinguish Multi-Watt Dual & Triple Rectifiers from previous models?
    • What is Class A and how does it differ from Class AB?
    • What is the click I hear when I turn on my SUBWAY D-800?
    • What is the Power Consumption of my amplifier?
    • What is the quickest method for dialing great tones with a Lone Star?
    • What Version Mark III do I own?
    • What TriAxis version do I have?
    • Why is the Limit light on my Subway D-800 or D-800+ staying on continuously?
    • Where is the Serial Number on my Mesa Amp?
    • Why is there occasionally a delay when powering up a SUBWAY D-800 or D-800+?
  • Cabinets

    • ★ What cabinet and speakers are best suited for my amplifier?
    • ★ What is the best way to connect speakers or cabinets?
    • Do you sell replacement cabinets?
    • Do you sell replacement grilles or grille material?
    • How can I care for and maintain my hardwood cabinet?
    • How can I tell if my speakers are wired "in phase"?
    • How does the Player Control Network function on my Bass Cabinet?
    • Why does my speaker's rated impedance not match an ohm meter reading?
  • Signal Management

    • Can I connect pedals between the CLEARLINK™ CONVERTER/ISO TRANSFORMER and the input of my amplifier?
    • Can I plug my guitar directly into the CLEARLINK™ BUFFER/BALANCED LINE-DRIVER, using it as an input buffer at the start of my pedalboard?
    • Can I use the CLEARLINK™ CONVERTER/ISO TRANSFORMER as a DI-box?
    • Can I use the CLEARLINK™ CONVERTER/ISO TRANSFORMER for re-amping?
    • Can I use the CLEARLINK™ CONVERTER/ISO TRANSFORMER without a CLEARLINK™ BUFFER/BALANCED LINE-DRIVER to break a ground loop that is causing buzz, hum and noise?
    • Can I use your Buffers for my bass?
    • Can I use the HIGH-WIRE™ DUAL BUFFER/OUTPUT BOOST as a three-way splitter for two amps and a tuner?
    • Can I use another STOWAWAY™ INPUT BUFFER at the end of my pedalboard to drive a long cable run to my back-line amplifier?
    • How does an Abacus work?
    • I am running multiple amplifiers, each with a CLEARLINK ™ CONVERTER/ISO TRANSFORMER, but (one or) some of them (still) have a buzz/hum, how can I get rid of it?
    • I am running multiple amplifiers, each with a CLEARLINK ™ CONVERTER/ISO TRANSFORMER, but my tone (still) sounds weird, why is that?
    • I’m using a switched-mode power adapter/supply (SMPS) and hear a high pitch “whine”, why is that?
    • I would like to use a vintage fuzz pedal, but have been told that they don’t work well with buffered signals, is this true?
    • Should I use a Buffer in my amp's effects loop?
    • What is “galvanic isolation” and does the CLEARLINK ™ CONVERTER/ISO TRANSFORMER have it?
    • What’s the maximum length of cable I can use between my guitar and the HIGH-WIRE™ DUAL BUFFER/OUTPUT BOOST’s input?
    • What’s the maximum length of cable that the CLEARLINK ™ BUFFER/BALANCED LINE-DRIVER can drive?
    • Why wasn’t a transformer isolated output provided in the CLEARLINK™ BUFFER/BALANCED LINE-DRIVER, for splitting or ground loop elimination applications?
    • What’s the maximum length of cable I can use between my guitar and the STOWAWAY™ INPUT BUFFER’s input?
  • Troubleshooting

    • ★ How can I troubleshoot tube issues?
    • My amp blew a fuse. What should I do?
    • How can I test to see if my Reverb Tank is bad?
  • Tubes & Fuses

    • Why should you only use MESA/Boogie® tubes in MESA amps?
    • What’s up with the color coding of your power tubes?
    • How are MESA tubes selected?
    • How are MESA tubes tested?
    • How can I troubleshoot tube issues?
    • How long will tubes last?
    • How do fuses work and why do they blow?
    • What is a Rectifier?
    • What is a SPAX7 and how is it best used?
    • What is the difference in a 6L6 and EL-34?
    • Can I remove Power Tubes in a Dual or Triple Rectifier Head to lower its wattage?

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