Randall RD45H Diavlo 45W 2-Channel Tube Guitar Amplifier Head

Randall RD45H Diavlo 45W Tube Guitar Amplifier Head

The Randall RD45H Diavlo 45W Tube Guitar Amplifier Head is a two-channel, all-tube amplifier designed for powerful electric guitar performance. Featuring four 12AX7 preamp tubes and two 6L6 power tubes, it delivers 45 watts of amplification with dedicated Clean and Overdrive channels, a switchable tube boost, and comprehensive tonal controls.

Designed for guitarists who need versatile high-gain amplification, the RD45H provides a practical solution for rehearsals, recording sessions, and live performances. Its independent channel controls allow musicians to transition between clean passages and saturated distortion without constantly readjusting settings. The Overdrive channel includes dedicated Gain and Volume controls, while the Clean channel offers an individual Gain control. A footswitchable Boost mode introduces additional tube overdrive to either channel, providing extra saturation for solos and heavier musical passages. Whether used as a high-gain guitar amplifier for metal or a versatile tube head for professional performances, the RD45H provides flexible control over gain and output levels.

The amplifier also accommodates professional recording and live sound workflows through its balanced, speaker-emulated XLR output. This connection simulates a miked Randall 4x12 speaker cabinet, allowing direct integration with recording interfaces, mixers, and front-of-house sound systems. A Class A discrete instrument-level effects loop supports external processing pedals, while multiple speaker connections accommodate compatible 4-, 8-, and 16-ohm cabinet configurations. The rugged black enclosure features a heavy-duty steel grille, protective corners, and a convenient carrying handle. An included two-button footswitch provides remote channel and boost selection. The amplifier requires a properly connected speaker load during operation, including when using its speaker-emulated output.

Key Features

• 45-Watt All-Tube Amplification: Combines 12AX7 preamp tubes with 6L6 power tubes for responsive guitar amplification suited to rehearsals, recording, and live performance.
• Two Independent Channels: Clean and Overdrive channels provide distinct tonal options for everything from controlled clean passages to heavily saturated guitar tones.
• Switchable Tube Boost: Adds an additional stage of tube overdrive to either channel, making it easy to increase saturation for solos and aggressive rhythm playing.
• Four-Band Tone Shaping: Shared Bass, Middle, Treble, and Presence controls provide precise adjustment of frequency response and overall tonal character.
• Speaker-Emulated XLR Output: Balanced direct output simulates a miked Randall 4x12 speaker cabinet for integration with recording equipment and professional sound systems.
• Class A Discrete Effects Loop: Instrument-level send and return connections allow external effects processors and pedals to integrate with the amplifier's signal path.
• Multiple Speaker Impedance Options: Dedicated speaker outputs support compatible 4-, 8-, and 16-ohm cabinet configurations.
• Included Two-Button Footswitch: Provides remote switching between Clean and Overdrive channels and activates the additional Boost mode.

Technical Specifications

General Specifications

• Brand: Randall
• Model: RD45H
• Manufacturer SKU: RD45H-U
• Series: Diavlo / RD Series
• Product Type: Tube Guitar Amplifier Head
• Amplifier Technology: All-Tube
• Amplifier Configuration: Standalone Head
• Finish: Black
• Output Power: 45W
• Number of Channels: 2
• Channel Types: Clean and Overdrive
• Additional Operating Mode: Tube Boost
• Channel Switching: Front-Panel Selector or External Footswitch

Tube Configuration

• Preamp Tube Type: 12AX7
• Preamp Tube Quantity: 4
• Power Tube Type: 6L6
• Power Tube Quantity: 2
• Manufacturer-Listed Alternative Power Tube Type: EL34

Front Panel Controls

• Clean Channel Gain: Dedicated Gain Control
• Overdrive Channel Gain: Dedicated Gain Control
• Overdrive Channel Volume: Dedicated Volume Control
• Channel Selector: Clean / Overdrive
• Boost Control: Switchable Tube Boost
• Equalization: Shared Bass, Middle, Treble, and Presence
• Master Volume: Global Output Level Control
• Standby Switch: Yes
• Power Switch: Yes

Audio Inputs and Outputs

• Instrument Input: 1 x 1/4" Guitar Input
• Speaker Outputs: 3 x 1/4" Speaker Jacks
• Speaker Impedance Compatibility: 4, 8, and 16 Ohms
• Single Speaker Output Configuration: 1 x 16-Ohm or 1 x 8-Ohm Cabinet
• Parallel Speaker Output Configuration: 1 x 4-Ohm or 2 x 8-Ohm Cabinets
• Speaker Output Restriction: Single and Parallel Output Groups Must Not Be Used Simultaneously
• Direct Output: 1 x Balanced Speaker-Emulated XLR
• Speaker Emulation: Randall 4x12 Cabinet Simulation
• XLR Ground Lift: Yes
• Effects Send: 1 x 1/4" Instrument-Level Output
• Effects Return: 1 x 1/4" Instrument-Level Input
• Effects Loop Type: Class A Discrete Instrument-Level Loop
• Footswitch Input: 1 x 1/4" TRS

Footswitch and Recording Features

• Footswitch Model: RF2T2C
• Footswitch Type: Two-Button Channel and Boost Controller
• Footswitch Functions: Channel Selection and Boost Activation
• Footswitch Included: Yes
• Direct Recording Capability: Speaker-Emulated XLR Output
• Silent Recording Configuration: Supported with Proper Speaker Load Connected and Master Volume Set to Zero
• External Preamp Integration: Supported Through Effects Return
• External Effects Integration: Supported Through Effects Send and Return

Construction and Physical Specifications

• Enclosure Type: Guitar Amplifier Head Cabinet
• Exterior Finish: Black
• Front Grille: Heavy-Duty Steel
• Carrying Handle: Top-Mounted
• Protective Corners: Yes
• Width: 19.7"
• Depth: 10"
• Height: 8.7"
• Weight: 30.9 lb

What's In the Box

• RF2T2C Two-Button Channel/Boost Footswitch