The Randall RD40 Diavlo is a Randall amplifier. Close alternatives include the Randall RD100H Diavlo 100W 3-Channel Head and the Randall KH103 Kirk Hammett Signature 3-Channel 120W Head. It pairs well with the Suhr Shiba Drive and the Keeley Red Dirt Overdrive.

Randall RD40 Diavlo

Randall · amplifier

The Randall RD40 Diavlo is a 40-watt member of the all-valve Diavlo line, sitting between the 20-watt combo and the 100-watt head in output. That places it as the gigging option in the range: enough power for a band without the impracticality of 100 valve watts. The Diavlo series marked Randall's move into all-tube amplification alongside the solid-state designs it was historically known for. It suits metal and hard rock players wanting valve gain at club volume.

What stands out

  • “Its strengths are the brutal, articulate gain and flexibility; the caveats are a voicing centered on high gain and a clean channel that is secondary”

    — from the community notes

  • “A tight, crushing high-gain voice with aggressive saturation and clarity for fast, down-tuned riffing and searing leads, plus clean and crunch channels for range”

    — from the reviews

  • “Players value the RD40 Diavlo for its tight, aggressive high gain and strong definition across three channels, a versatile metal amp with usable cleans”

    — from the community notes

  • “For thrash and modern metal in a flexible tube amp, the RD40 Diavlo delivers”

    — from the reviews

  • “The Randall RD40 Diavlo is a 40-watt member of the all-valve Diavlo line, sitting between the 20-watt combo and the 100-watt head in output”

    — from the listing

  • high gain
  • aggressive
  • tight
  • clean
  • metal
  • thrash
  • gain
  • clarity

Good for

  • Live
  • Studio

Genres the Randall RD40 Diavlo is commonly used in

  • Metal
  • Hard Rock
  • Heavy Metal
    citedInferred from shared tonal signals, not a stated genre tag.
  • Death Metal
    citedInferred from shared tonal signals, not a stated genre tag.
  • Thrash Metal
    citedInferred from shared tonal signals, not a stated genre tag.
  • Djent
    citedInferred from shared tonal signals, not a stated genre tag.

Pedals that stack with the Randall RD40 Diavlo

Suhr Shiba Drive

Suhr

18% match
$200via Reverb

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → mid-forward)

Suhr Shiba Drive pushes a high gain tone toward mid-forward

Goes in front of the amp

Keeley Red Dirt Overdrive

Keeley

18% match

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → mid-forward)

Keeley Red Dirt Overdrive takes that high gain character and pushes it toward mid-forward

Goes in front of the amp

Beetronics Buzzter Boost Preamp

Beetronics

18% match
$118.72via Reverb

pushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → clean boost)

Feed a high gain signal into Beetronics Buzzter Boost Preamp and it comes out closer to clean boost

Goes in front of the amp

Electro-Harmonix Deluxe Electric Mistress

Electro-Harmonix

15% match
$200.42via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → shimmer)

Put Electro-Harmonix Deluxe Electric Mistress after Randall RD40 Diavlo in the signal chain, clear of Randall RD40 Diavlo's own gain stage

Goes in front of the amp

Hungry Robot Moby Dick V2

Hungry Robot

13% match

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → lush)

Keep Hungry Robot Moby Dick V2 in Randall RD40 Diavlo's effects loop, clear of Randall RD40 Diavlo's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

Meris Mercury7 Reverb

Meris

13% match
$299via Reverb

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → lush)

Keep Randall RD40 Diavlo's high gain voice out front: Meris Mercury7 Reverb goes in Randall RD40 Diavlo's effects loop so its ambient voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Sits in the amp's effects loop

Crazy Tube Circuits Golden Ratio

Crazy Tube Circuits

12% match

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain.

Crazy Tube Circuits Golden Ratio's own tight character is the real reason this is worth trying

Goes in front of the amp

MXR CAE Wah

MXR

tonal match
$121.09via Reverb

Goes in front of the amp

MXR CAE Wah belongs in front of Randall RD40 Diavlo, since a wah tracks picking dynamics best on the raw signal

Alternativessee all similar tone character →

Randall RD100H Diavlo 100W 3-Channel Head

Randall

72% similarity

Shared character: two channels, voicing, definition

Randall KH103 Kirk Hammett Signature 3-Channel 120W Head

Randall

70% similarity
$1875.31via Reverb

Shared character: two channels, voicing, definition

Suhr Peter Thorn PT100 100-Watt Signature

Suhr

56% similarity
$3099via Reverb

Shared character: wide range, two channels, gig

Marshall JCM800 Purple Ltd

Marshall

56% similarity
$1900.89via Reverb

Shared character: two channels, band, hard rock

Peavey 6505 II

Peavey

53% similarity
$1699.99via Reverb

Shared character: metal, mix, aggressive playing

PRS MT 15 V1 Mark Tremonti Signature 2-Channel 15W Head

PRS

52% similarity
$499via Reverb

Shared character: two channels, hard rock, mix

Marshall 2203KK Kerry King JCM800

Marshall

52% similarity

Shared character: two channels, metal, mix

Mesa Boogie Triple Crown TC-100 Head

Mesa Boogie

49% similarity
$2999via Reverb

Shared character: two channels, gig, crunch

Laney Ironheart Foundry Leadtop 60W Head

Laney

49% similarity
$319.99via Reverb

Shared character: metal, hard rock, crunch

Mesa/Boogie Triple Rectifier

Mesa Boogie

48% similarity
$1250via Reverb

Shared character: two channels, wide range, metal

PRS MT 15 V2 Mark Tremonti Signature 2-Channel 15W Head

PRS

48% similarity
$949via Reverb

Shared character: hard rock, mix, crunch

Peavey 112-6 1x12

Peavey

47% similarity

Shared character: gig, mix

See all alternatives to the Randall RD40 Diavlo (cheaper + boutique) →

Questions people ask

What are good alternatives to the Randall RD40 Diavlo?+

The closest matches in character are the Randall RD100H Diavlo 100W 3-Channel Head, the Randall KH103 Kirk Hammett Signature 3-Channel 120W Head, the Suhr Peter Thorn PT100 100-Watt Signature.

What pairs well with the Randall RD40 Diavlo?+

Strong matches from rig and tone-complementarity evidence: Suhr Shiba Drive, Keeley Red Dirt Overdrive, Beetronics Buzzter Boost Preamp — Suhr Shiba Drive pushes a high gain tone toward mid-forward.

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