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Mad Professor Old School 51RT

$2,924.98 Price Tier: High-end

1 Critic Review

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Page last updated Jan 16, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated January 14, 2026.

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WC Music Store

$2,924.98

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Average Price: $2,925

High-end/Boutique

$300

$701+

Price Tier

In the Combo Guitar Amplifiers category, Mad Professor Old School 51RT is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

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High-end

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Description

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Step back into a golden era of sound with the Mad Professor Old School 51RT, a touch-sensitive marvel that pays homage to the classic tones of yesteryear while embracing modern versatility. This single-channel combo amplifier is your ticket to an auditory journey across genres, from the soulful strums of reggae to the gritty riffs of hard rock. With a power-packed 51 watts delivered through a Jensen Stealth 100 speaker, the Old School 51RT promises clarity and richness in every note.

Its intuitive design eliminates the need for channel switching, allowing you to seamlessly transition between clean and distorted tones by simply adjusting your guitar's volume and tone knobs. The built-in reverb and tremolo effects add a distinct vintage flair, letting your creativity soar.

Under the hood, you'll find an array of premium tubes, including 5 x ECC83/12AX7 preamp tubes and 2 x EL34 power amp tubes, all working in harmony to deliver that coveted warm tube sound. A universal power supply ensures compatibility wherever your music takes you, making it a reliable companion for both touring musicians and home studio enthusiasts.

Elevate your performance with the Mad Professor Old School 51RT—a timeless piece of gear crafted for those who cherish the roots of rock 'n' roll, yet desire a modern edge.

Key Features:

51 Watts of pure tube power
5 x ECC83/12AX7 preamp tubes, 2 x EL34 poweramp tubes
Jensen Stealth 100 speaker for a full-bodied sound
Built-in Reverb and Tremolo for vintage effects
Low/High gain input switch for tonal versatility
Universal power supply (100-120VAC/220-240VAC) for global use

Videos

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Mad Professor Pedals

Mad Professor Old School 51RT demo: Part 1 by Marko Karhu

Mad Professor Pedals

Mad Professor Old School 51RT demo: Part 2 by Marko Karhu

Mad Professor Pedals

TONE REFERENCE - MAD PROFESSOR OLD SCHOOL 51 RT

Goldmusicsrl

Kauffmann '70 S with Mad Professor Old School 51RT amp

Kauffmann's Guitar Store

Mad Professor Old School 51 RT amp demo by Justin Johnson -Pajamajam-

Mad Professor Pedals

Mad Professor Old School 51 RT amp demo by Justin Johnson -In The Pines-

Mad Professor Pedals

Reviews

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Critic Reviews

NAMM 2015: Mad Professor reveals Old School 51 RT amp | MusicRadar

musicradar.com

Mad Professor's Old School 51RT delivers a powerful punch with classic tones that span decades, from shimmering cleans to gritty distortions. Designed for versatility, it shines across genres, making it a solid choice for any guitarist. The built-in reverb and tremolo add a nostalgic touch, enhancing its vintage vibe. However, while it excels at adapting to various styles, some may find the absence of channel switching limiting. Ultimately, the 51RT is a compelling option for those seeking a reliable, tone-rich amplifier that plays well with pedals, but it may not satisfy players who crave extensive tonal options.

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