Randall Diavlo RD45H, RD20H - Amplifier Manual

Also See for Diavlo RD45H:

Operation manual (2 pages)

Table of Contents

Contents

1 Overview
2 Documents / Resources
- 2.1 Download manual

Randall Diavlo RD45H, RD20H - Amplifier Manual

Overview

Overview

Never operate amplifier without proper speaker load plugged in!! (including silent mode)

1/4" Guitar input - Plug your guitar into this jack/connector.
Clean Channel Volume- this controls the amount of clean channel signal, to achieve a more aggresive tone from the clean channel, lower master volume and crank the clean channel gain. Note that only the overdrive channel has separate Gain and Volume controls to match channel volumes.
Channel Selector Switch toggles between Clean and overdrive channels-
(Footswitchable- Foot controller will override panel function)
Overdrive Channel Gain - This knob works as an aggressive all tube overdrive circuit. It dynamically responds with more overdrive as more input is fed from your pickups. Turn to the right for more saturation.
Overdrive Channel Volume- this control works as volume control of the overdrive channel only- Use this to match the output levels between the Clean and Overdrvie channels. For cleaner tones, keep at lowest setting, turn volume all the way up and use gain knob as volume output control.
Boost - Adds extra layer of tube overdrive to both channels (Footswitchable)
Bass EQ Response - turn to the right for more bass/low frequency
Midrange EQ Response - adjusts middle frequencies- put this wherever you like.
Treble EQ Response - Hi Frequency adjustment to the tone circuit- "brightness"
Presence Response - this is tied to the power amp and effects the highest, brightest frequencies, this will help tailor the sound to best suit the brightness of your guitar.
MASTER - Overall volume output control. This feeds the speaker output. Note that to achieve cleanest tones, turn volume all the way up and use GAIN KNOB as volume control.
Standby/Play switch- Wait 5 seconds after powering amp on before switching from Standby to Play and visa/versa. NOTE: Leave Standby in ON position (with speaker plugged in!) for silent operation with Speaker Emulator output (see#17)
Power switch turns unit on and off
Power cable input for mains connection- Mains Fuse socket attached.
Single Speaker output - plug in 1x16Ω or 1x8Ω speaker cabinet into this jack-
NOT TO BE USED AT THE SAME TIME AS PARALLEL OUTPUTS!!! #16
Parallel Speaker Outputs you can safely plug in the following speaker cabinet configurations: 1x4Ω, 2x8Ω
NOT TO BE USED AT THE SAME TIME AS SINGLE OUTPUT!!! #15
Speaker Emulator - XLR Balanced output is signal fed post effects loop from the preamp (all three channels & EQ). This signal is then sent through the speaker emulator which simulates the sound and response of a mic'd up Randall 4x12 speaker cabinet. This function is useful as a Direct send to PA/FOH for silent stages, in ear monitor feed or send to external power amp. "Silent Mode" - For direct (silent) recording, Leave STANDBY (#12) in ON position(with speaker plugged in!!!). The preamp will send signal to the XLR output and be fed from the individual channel controls.
XLR ground lift changes the ground connection to fix ground loops when interfacing with other equipment - use at quietest setting for best performance.
Class A Discrete instrument level effects loop return. This plugs into external pedal effects unit output to complete signal "loop". Also serves as power amp input so external preamp can be plugged directly to power amp section with active volume control and speaker emulator XLR output.
Class A Discrete instrument level effects loop send. This plugs into external pedal effects unit input and feeds signal from the Gain and Tone knobs. Also serves as unbalanced preamp output send but will mute output unless return jack receives return signal.
Footswitch jack- Standard two button 1/4" TRS controls Channel and boost (Randall Model RF2T2C)