Mad Professor Old School 51 RT-Head 51W Tube Guitar Amp Head - Black and Beige + Original Reverb and Tremolo Foot Switch

Exceptional condition Mad Professor Old School boutique tube amplifier head with original factory footswitch for reverb and tremolo control.

Hand-built in England and designed in Finland, these amps are extremely rare and highly regarded for touch sensitivity, vintage-style cleans, dynamic breakup, and pedal platform performance.

Features built-in tube-driven reverb and tremolo, effects loop, and multiple speaker outputs. Includes the original matching Mad Professor footswitch.

Condition is excellent with minimal cosmetic wear. Fully functional and sounds incredible.

Perfect for players looking for boutique Fender-inspired tones with premium craftsmanship and rare collectibility.

Serial: HI40028-0317

Single channel amp of touch sensitive old school tones.

51RT is the more British inspired amp in our lineup with the EL34 power amp section but it can also get to the more American tones thanks to the versatile EQ. This amp can give you also a larger range of overdriven tones compared to the 21RT. With the voicing switch you can go from the more classic lower gain tones in the down position to a more modern higher gain tones in the upper position. 

The switch increases gain but also effects frequency response. The lower position will have less low-mids and more treble and the higher position has more low mids and a little less treble. It also has the Presence knob to further tailor the brightness of your sound.

The amp was designed to give you a great overdriven tones that clean up beautifully with your guitar volume and playing dynamics. It also can give you the perfect clean tone to build your setup on as the amp is also designed to blend seamlessly with your pedalboard and takes pedals extremely well.

The amp has built in Reverb and Tremolo for the final old school touch and comes with a footswitch to control both. It also features built in series effects loop for instrument level effects.

TECHNICAL SPECIFICATIONS:

Preamp tubes: 5 x ECC83/12AX7

Poweramp tubes 2 x EL34

Output power 51 Watts

Low/High gain input switch

Universal power supply easily switchable between 100-120VAC/220-240VAC

Power consumption Max 100 VA

Dimensions (W*D*H): 61 x 26 x 28 cm / 24” x 10,25” x 11”

Weight: 17,5 kg / 30 lbs / 38 lb 9 oz

TUBE ASSIGNMENT:

V1 (nearest to input) Input stage and Gain

V2 Gain / Boost and tone stack driver

V3 Tone stack recovery and loop send

V4 Effects loop return and phase inverter reference voltage

V5 Phase inverter