Mesa/Boogie Express series User Manual

Precautions _______________________________________________________________________________ 0
Overview ________________________________________________________________________________ 1-2
FRONT PANEL CONTROLS & FEATURES
MODES: CLEAN, CRUNCH, BLUES, BURN ____________________________________________________ 3-4
GAIN _____________________________________________________________________________________ 5
TREBLE __________________________________________________________________________________ 5
MID ______________________________________________________________________________________ 6
BASS _____________________________________________________________________________________ 6
REVERB __________________________________________________________________________________ 6
MASTER __________________________________________________________________________________ 7
CH1 / FTSW / CH2 SWITCH ___________________________________________________________________ 7
CONTOUR_______________________________________________________________________________ 7-8
STANDBY _________________________________________________________________________________ 8
POWER ___________________________________________________________________________________ 8
REAR PANEL CONTROLS, SWITCHES & JACKS
EXTERNAL SWITCHING _____________________________________________________________________ 9
EFFECTS LOOP ____________________________________________________________________________ 9
POWER SELECT __________________________________________________________________________ 10
FULL POWER _____________________________________________________________________________ 10
5 WATT __________________________________________________________________________________ 10
SPEAKERS _______________________________________________________________________________ 11
FACTORY SAMPLE SETTINGS _______________________________________________________________ 12
PERSONAL SETTINGS _____________________________________________________________________ 13
DIAGNOSING TUBE PROBLEMS __________________________________________________________ 14-15
BIAS ADJUSTMENT ARTICLE ____________________________________________________________ 16-18
SPEAKER IMPEDANCE MATCHING AND HOOKUP GUIDE _____________________________________ 19-24
FEATURE ARTICLE: ON PENTODES, TRIODES & IRISHMEN by Randall Smith ____________________ 25-27
TUBE TASK CHARTS: 5:25 & 5:50 _________________________________________________________ 28-29
PART SHEETS: 5:25 & 5:50 _______________________________________________________________ 30-31
Table of Contents

Mesa/Boogie Express series Specifications

General

Series	Express
Type	Tube Amplifier
Channels	2
Preamp Tubes	5x12AX7
Reverb	Yes
EQ	5-band graphic EQ
Footswitch	Reverb, EQ
Controls	Gain, Treble, Mid, Bass, Reverb, Master
Speaker	1 x 12"
Inputs	1 x 1/4" Instrument
Wattage	25W (Express 5:25), 50W (Express 5:50)