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Mesa/Boogie Express Plus User Manual

Mesa/Boogie Express Plus
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PAGE 27
4 OHM 4 OHM 8 OHM
Partial back view of amplifier
8 Ohm Cabinet
8 Ohm Cabinet
SERIES BOX
16 Ohm
8 Ohm
8 Ohm
8 Ohm Cabinet
10
SAFE MISMATCH
12
4 OHM 4 OHM
Partial back view of amplifier
16 Ohm Cabinet
16 Ohm Cabinet
11
8 OHM
8 Ohm Cabinet
16 Ohm Cabinet
16 Ohm Cabinet
4 OHM4 OHM8 OHM
Partial back view of amp
PARALLEL BOX
8 Ohm
16 Ohm
16 Ohm
WIRING SCHEMES...Amplifier to Speaker Cabinets
CORRECT MATCH
SAFE MISMATCH
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Mesa/Boogie Express Plus Specifications

General IconGeneral
Channels2
ReverbYes
EQ5-Band Graphic EQ
TypeTube Amplifier
Effects LoopYes
Tubes4x12AX7, 2xEL84
Modes per Channel2
Speaker1 x 12" Celestion

Summary

Important Safety Instructions

Front Panel Controls: Modes and Channels

Front Panel Tone and Volume Controls

Gain and Treble Control Explanations

Explains the function and interaction of the Gain and Treble controls for tone shaping.

Mid, Bass, and Reverb Control Explanations

Explains the function and interaction of the Mid, Bass, and Reverb controls for tone shaping.

Front Panel Master and EQ Sections

Master Control and EQ Section Overview

Details the Master control and introduces the Equalizer section, EQ toggles, and style selection.

Front Panel Power and Switching Features

Channel Power Select (Multi-Watt)

Details the Multi-Watt power switching feature for adjusting output wattage and tone.

Rear Panel Connections and Features

Effects Loop & Speaker Connections

Details the series EFFECTS LOOP and speaker output jacks for impedance matching and cabinet hookup.

Tube Troubleshooting and Maintenance

Diagnosing Pre-Amp Tube Problems

Guides on identifying and replacing faulty pre-amp tubes, emphasizing one-at-a-time replacement.

Speaker Impedance Matching and Wiring

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