The Mad Professor Ruby Red Booster is a Mad Professor boost pedal, currently around $129.99. Close alternatives include the Catalinbread VariOboost and the Vox VTB-1 Treble Booster. It pairs well with the Dumble Steel String Singer and the Marshall JTM45 45W Tube Guitar Amp Head.

Mad Professor Ruby Red Booster

Mad Professor · pedal

The Mad Professor Ruby Red Booster is a clean boost and treble booster pedal with Master, Boost, and Treble controls, plus an internal switch for a high-quality buffer in bypass mode. Boost sets the gain of the booster from unity up to roughly 40dB, high enough that the pedal begins to distort internally when cranked, letting it double as a light overdrive. Treble adds up to about 15dB of carefully tuned high-end boost with an optimized bass slope, and Master sets the final output level after the booster stage. It is a versatile utility pedal that functions as a regular boost, a treble booster, or a light overdrive depending on how the Boost control is set.

What stands out

  • “It is a versatile utility pedal that functions as a regular boost, a treble booster, or a light overdrive depending on how the Boost control is set”

    — from the listing

  • “Genuinely doubles as three different tools, clean boost, treble boost, and overdrive, depending on the Boost knob position, which is unusual generosity for a booster pedal”

    — from the reviews

  • “The Mad Professor Ruby Red Booster is a clean boost and treble booster pedal with Master, Boost, and Treble controls, plus an internal switch for a high-quality buffer in bypass mode”

    — from the listing

  • “Boost sets the gain of the booster from unity up to roughly 40dB, high enough that the pedal begins to distort internally when cranked, letting it double as a light overdrive”

    — from the listing

  • “Primary use case is pushing an already-driven amp into more saturation, or brightening a dark guitar or pickup combination via the treble booster mode”

    — from the community notes

  • boost
  • treble
  • treble booster
  • overdrive
  • clean boost
  • gain
  • touch
  • saturation
$129.99View on Reverb

Price updated Oct 23, 2026

Genres the Mad Professor Ruby Red Booster is commonly used in

  • Rock
  • Classic Rock
  • Blues
  • Doom Metal
    citedInferred from shared tonal signals, not a stated genre tag.
  • Alternative
    citedInferred from shared tonal signals, not a stated genre tag.
  • Indie Rock
    citedInferred from shared tonal signals, not a stated genre tag.

Amps that pair well with the Mad Professor Ruby Red Booster

Dumble Steel String Singer

Dumble

24% match

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Dumble Steel String Singer's smooth balances out the bright tone

Comes later in the signal chain

Marshall JTM45 45W Tube Guitar Amp Head

amplifier

24% match

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)

Where this leans bright, Marshall JTM45 45W Tube Guitar Amp Head answers back warm

Comes later in the signal chain

Hiwatt Park P18LH 'Little 45' Handwired18W

Hiwatt

tonal match
$4300via Reverb

Comes later in the signal chain

Hiwatt Park P18LH 'Little 45' Handwired18W's warm balances out the bright tone

Orange BT1000H Terror Bass 1000-Watt Bass Amp

Orange

tonal match

Comes later in the signal chain

Where this leans bright, Orange BT1000H Terror Bass 1000-Watt Bass Amp answers back warm

Orange Terror Bass

Orange

tonal match
$754.36via Reverb

Comes later in the signal chain

Where this leans bright, Orange Terror Bass answers back warm

Orange Little Bass Thing

Orange

tonal match
$683.03via Reverb

Comes later in the signal chain

Orange Little Bass Thing's warm balances out the bright tone

Gibson GA-50

Gibson

tonal match

Comes later in the signal chain

Where this leans bright, Gibson GA-50 answers back warm

Victory Amplifiers V50 The Earl

amplifier

tonal match

Comes later in the signal chain

Run Victory Amplifiers V50 The Earl after it and the bright edge settles into something more warm

Pedals that stack with the Mad Professor Ruby Red Booster

Spaceman Explorer 6-Stage Phaser

Spaceman

18% match
$249.95via 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.

Keep Spaceman Explorer 6-Stage Phaser after Mad Professor Ruby Red Booster in the signal chain, clear of Mad Professor Ruby Red Booster's own gain stage

Comes later in the signal chain

Ashdown Velvet Compressor

Ashdown

18% match
$243.31via Reverb

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Ashdown Velvet Compressor's own compressed character is the real reason this is worth trying

Comes earlier in the signal chain

Catalinbread SFT

Catalinbread

17% match

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)

Run Catalinbread SFT after it and the bright edge settles into something more warm

Comes later in the signal chain

Greer Mizuki blue

Greer

16% match
$199via Reverb

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)

Greer Mizuki blue's warm balances out the bright tone

Comes later in the signal chain

T-Rex Junior Roomate

T Rex

13% match
$108.38via 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.

Keep T-Rex Junior Roomate after Mad Professor Ruby Red Booster in the signal chain, clear of Mad Professor Ruby Red Booster's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

Line 6 DL4 Delay Modeler

pedal

13% match
$370.13via 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.

Keep Line 6 DL4 Delay Modeler after Mad Professor Ruby Red Booster in the signal chain, clear of Mad Professor Ruby Red Booster's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

SolidGoldFX Commodore Breaker Overdrive

Solidgoldfx

tonal match
$152.15via Reverb

Comes later in the signal chain

Where this leans bright, SolidGoldFX Commodore Breaker Overdrive answers back smooth

Dunlop Blue Hippo Optical Tremolo

Dunlop

tonal match

Comes later in the signal chain

Dunlop Blue Hippo Optical Tremolo's warm balances out the bright tone

Cheaper alternatives

Demon FX Full BB Preamp

Demon Fx

70% similarity
$56.80via Reverb

Shared character: boost, treble, gain

67Audio Libido

67audio

69% similarity
$94.78via Reverb

Shared character: boost, true bypass, treble

TC Electronic Spark Booster

TC Electronic

65% similarity
$75.05via Reverb

Shared character: boost, treble

Fender Engager Boost

Fender

59% similarity
$94.07via Reverb

Shared character: boost, treble, gain

Caline CP-12 Blue Pure Sky

Caline

55% similarity
$30.88via Reverb

Shared character: boost, true bypass, treble

Xotic BB Preamp

Xotic

55% similarity
$99via Reverb

Shared character: boost, dark, treble

Boutique & premium upgrades

Xotic RC Booster

Xotic

60% similarity
$197via Reverb

Shared character: boost, treble, touch

Death By Audio Thee Treble

Death By Audio

59% similarity
$219.46via Reverb

Shared character: boost, treble, gain

Strymon Sunset Dual Overdrive

Strymon

56% similarity
$299via Reverb

Shared character: boost, gain, stage

Catalinbread Silver Kiss Reissue

Catalinbread

91% similarity
$209.61via Reverb

similar tone character

Xotic EP-Pro

Xotic

91% similarity
$295via Reverb

similar tone character

Similar charactersee all similar tone character →

Catalinbread VariOboost

Catalinbread

65% similarity

Shared character: boost, treble

Vox VTB-1 Treble Booster

Vox

61% similarity
$135.48via Reverb

Shared character: boost, treble, touch

Matthews Effects Architect

Matthews Effects

59% similarity

Shared character: true bypass, boost, stage

NuX SSD-10

Nux

59% similarity

Shared character: boost, high end, overdrive

Catalinbread Naga Viper MkII

Catalinbread

58% similarity
$140.71via Reverb

Shared character: boost, treble

J. Rockett Archer Clean

J Rockett

56% similarity

Shared character: boost, high end, treble

See all alternatives to the Mad Professor Ruby Red Booster (cheaper + boutique) →

Questions people ask

What are good alternatives to the Mad Professor Ruby Red Booster?+

The closest matches in character are the Catalinbread VariOboost, the Vox VTB-1 Treble Booster, the Matthews Effects Architect. Budget picks: Demon FX Full BB Preamp, 67Audio Libido, TC Electronic Spark Booster. Boutique upgrades: Xotic RC Booster, Death By Audio Thee Treble, Strymon Sunset Dual Overdrive.

What pairs well with the Mad Professor Ruby Red Booster?+

Strong matches from rig and tone-complementarity evidence: Dumble Steel String Singer, Marshall JTM45 45W Tube Guitar Amp Head, Hiwatt Park P18LH 'Little 45' Handwired18W — Dumble Steel String Singer's smooth balances out the bright tone.

How much does the Mad Professor Ruby Red Booster cost?+

Around $129.99 (live listing price, updated Oct 23, 2026).

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