Mesa Boogie 90's Triple Rectifier Guitar Amplifier Head

For over three decades, the MESA Triple Rectifier® Solo Head has defined the sound of modern rock and heavy music, delivering uncompromising power and unmistakable presence. Renowned for its crushing high-gain tones and commanding sonic impact, this amplifier continues to inspire generations of guitarists, shaping genres and stages alike. Built for players who demand intensity without compromise, it’s the ultimate expression of aggressive, precision-driven tone.

Features

• Amp Tube type.
  
• Power Amp uses 6x 6L6 tubes for high-gain tonal clarity.
  
• Preamp features 5x 12AX7 tubes for dynamic response.
  
• Rectifier uses 3x 5U4GB tubes with selectable Tube or Silicon Diode rectification.
  
• Class A/B Power Amp includes Bold/Spongy Variac Switch for tonal versatility.
  
• Two footswitchable channels have independent Gain, Treble, Middle, Bass, Presence & Master Controls.
  
• Channel 1 “Orange” offers Clean or Vintage High Gain Modes and Modern High Gain Red Mode.
  
• Channel 2 “Red” offers Vintage High Gain or Variable Vintage Orange Mode.
  
• Effects Loop is Tube-Driven Series FX Loop with Bypass Option.
  
• Global Output Level Control is active when Effects Loop is engaged.
  
• Selectable Bias supports 6L6 or EL34 Power Tubes.
  
• Maintenance-Free Fixed Bias ensures stable performance.
  
• Cooling is Fan-Assisted for consistent operation.
  
• Slave Output allows external Power Amp integration.
  
• Speaker Outputs include 8 Ohm x2, 4 Ohm x2, 16 Ohm x1.
  
• Steel Chassis Material
  
• Marine Grade Baltic Birch Cabinet Material
  
• 150 Watts Total Wattage.

Specifications

Head
Available Formats: Head
Channels / Modes: 2 Fully Independent Channels with Channel Style
Dimensions: 10 H x 25 1/2 W x 9 7/8 D | 25.4 cm H x 64.77 cm W x 24.77 cm D
Foot Switchable Functions: Compact, 1 Button Footswitch (Channel 1/2)
Graphic EQ / Reverb / FX / Solo: Tube Driven Series FX Loop

Mode Voicings or Styles
Channel 1 “Orange” (LED Light Color): Clean or Variable High Gain (“Vintage”) Modes, with Channel Style (Cloning) Switch also set to Modern High Gain (“Red”) Mode; Independent Gain, Treble, Middle, Bass, Presence & Master Controls
Channel 2 “Red” (LED Light Color): Vintage High Gain Mode, or with Channel Style/Cloning Switch set to Variable “Vintage” High Gain (“Orange”) Mode; Independent Gain, Treble, Middle, Bass, Presence & Master Controls

Power and Tubes
Amp Type: Tube
Bias Switch for Alternate Power Tube Types: Yes – 6L6 or EL34 Power Tubes
Power Amp Details / Class / Wattage: Class A/B Bold/Spongy Power Switch
Power Amp Tubes: 6x MESA 6L6
Preamp Tubes: 5x 12AX7
Rectifier Tubes: 3x 5U4GB
Rectifier Type: Selectable Tube or Silicon Diode Rectification
Variac Power Switch: YES – 2-Position “BOLD/SPONGY” Power Switch
Wattages Quick Reference: 150 Watts

Controls and Features
Channel Controls: Independent Gain, Treble, Middle, Bass, Presence & Master Controls
Number of Footswitchable Channels or Modes: Two Channels
Number of Style Modes: 3
Effects Loop Bypass Options: Tube-Driven, Series FX Loop
External Switching Jack Options and/or MIDI: Channel and Loop
Global Output Level Control: Yes – Active when Effects Loop is engaged
Maintenance-Free Fixed Bias: Yes
Slave Output: Yes
Cooling: Fan

Outputs and Speakers
Speaker Outputs: 8 Ohm x2, 4 Ohm x2, 16 Ohm x1

Cabinet Features
Cabinet Material: Marine Grade, Baltic Birch
Standard Finish Options No Extra Cost: Black Bronco Vinyl, Black Diamond Plate Grille, Black Chassis, Black Handle & Leather Corners