BrownFace Imagine the amazing tone of the Fender® 1961-1962 Showman® amplifier (second channel) with its beautifully sweet harmonic tremolo voice. This is often called THE Tremolo and has been imitated by many over the years but never replicated by any. The signal rides up and down on the harmonics, alternating high and low. This can be compared to the rotating speaker effect of a Leslie system. This type of tremolo has a great characteristic: dynamic adaptability. When the melody is slow and intense, its vibrant soul is expressed and the timbre is particularly rich and deep, but when the mood changes and the sound becomes aggressive and loud, the effect is almost absorbed and distanced, leaving the full attack of the sound of the guitar preserved. In this mode, the extreme dynamics of the tremolo follow your playing style, enhancing your sound without getting in the way. Blackface In 1964, Fender® introduced the Blackface series of amplifiers, which offered a cleaner and brighter sound compared to the Tweed/Brownface models. They used another type of tremolo, known from the 50s. With tremolo, the signal alternates in and out, giving a sort of on/off feeling, making the effect more efficient and easier to hear. This feature is also called amplitude modulation. This tremolo is very noticeable when needed, and cuts through the mix easily and loudly. It is not as dynamic in melodies, but when used for example in solos, it really liberates the guitar sound, giving it depth and length. This is certainly a more common effect and probably requires less experience to use properly than the Harmonic Tremolo.