Mesa Fillmore 50 - User Manual

Questions and Answers

E
Erin DavisJul 27, 2025
What to do if Mesa Fillmore 50 Musical Instrument Amplifier power tube fails?
- V
  Valerie SandersJul 28, 2025
  If you suspect a shorted power tube in your Mesa Musical Instrument Amplifier, quickly switch the amp to STANDBY and check the power tubes for one that's glowing red hot. If a major arcing short occurs between the plate and the cathode, IMMEDIATELY turn the amp to STANDBY, replace the tube and the fuse with the proper slo-blo type, and power up the amp using the power up procedure.
J
joshua40Aug 4, 2025
How to fix tube noise and microphonics in Mesa Fillmore 50 Musical Instrument Amplifier?
- K
  Kristen FernandezAug 4, 2025
  If you are experiencing tube noise and microphonics in your Mesa Musical Instrument Amplifier, consider swapping out a pre-amp or power tube to resolve the issue.
J
John LoganAug 12, 2025
How to diagnose pre-amp tube problems in Mesa Fillmore 50 Musical Instrument Amplifier?
- L
  Lisa PorterAug 12, 2025
  To diagnose pre-amp tube problems in your Mesa Musical Instrument Amplifier, try swapping tubes or replacing the driver tube.
M
Michelle FisherAug 18, 2025
Why is my Mesa Fillmore 50 Musical Instrument Amplifier making tube noise?
- W
  wfergusonAug 18, 2025
  If you notice tube noise in your Mesa Musical Instrument Amplifier, it might be due to contamination within the tube. Lightly tapping on the glass of the tube will probably change the noise, helping you identify the problematic tube.

Summary

Important Safety Instructions

Amplifier Overview and Features

Channel Modes Explained

Clean Mode Description

Details the Clean channel's gain stages, tonal characteristics, and response.

Drive Mode Description

Explains the Drive channel's gain stages, tonal characteristics, and response.

Hi Mode Description

Getting Started Guide

Helpful Hints for Tone Shaping

Front Panel Gain Control Usage

Guidance on using the GAIN control for different zones of saturation and tone.

Front Panel Treble and Mid Controls

Front Panel Mid and Bass Controls

Front Panel Presence and Reverb

Front Panel Master and Channel Select

Rear Panel Connections and Power

Power, Standby, and Cold Start

Instructions for powering the amp on/off, using standby, and cold start procedure.

Rear Panel Effects Loop and Reverb

Rear Panel Speaker Outputs

Factory Sample Settings

User Settings Templates

Troubleshooting Tube Issues

Diagnosing Power Tube Failure

Identifying and addressing problems with power tubes, including shorts and noise.

Diagnosing Pre-Amp Tube Problems

Tube Replacement and Maintenance

Speaker Impedance Matching Guide

Series and Parallel Speaker Wiring

How to wire speakers in series and parallel for optimal impedance.

Speaker Cabinet Wiring Schemes

Mesa Fillmore 50 Specifications

General

Power	50 Watts
Channels	2
Type	Tube Amplifier
Effects Loop	Yes
Tubes	5x 12AX7
EQ	Bass, Mid, Treble
Footswitch	Channel 1/2
Controls	Gain, Treble, Mid, Bass, Presence, Reverb, Master