All user reviews for the Mad Professor Old School 21RT

This vintage sounding amp, fully handcrafted in England and conceptualized in Finland, has the following features:
- Preamp tubes: 4 x ECC83/12AX7
- Poweramp tubes: 2 x 6V6
- Power: 21 Watts
- Power supply: Max 100 VA
- Combo Speaker: 12" 8 ohms, creamback 65W celestion
- Combo dimensions: 61 x 26 x 50.5 cm / Head: 61 x 26 x 27.6 cm
- Weight: Combo 22.6 kg
The cabinet is entirely made of solid Scandinavian birch wood.

A superb and very crystalline clean up to about half of the gain stroke, after which it starts to crunch slightly depending on the feel of the strings. The master volume potentiometer allows you to make it crunching or bring it up to a large overdrive even at low volume.
Usual settings in terms of eq but with in addition a cut filter (low-pass filter) which allows to attenuate or cut very high frequencies undesirable during a crunch for example but sought in its own right.
The reverb and tremolo are superb.
This amp sounds a lot like a vox ac30.
It is rather intended, as its name suggests to lovers of any musical style, except metal.

This amp really takes up the main characteristics of the old traditional mythical amps without being a faithful copy (deluxe reverb, ac30, plexi) and therefore does not have an effects loop. It will satisfy lovers of old sound, both in clean and crunch and/or overdrive.

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