The Blonde amplifiers included all of the piggyback Fender amps (the Tremolux, Bassman, Showman, and Bandmaster ) as well as the Twin and Vibrasonic combos.

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The first of these were the KF models, produced between 1945 and 1946.

The early KF and Fender amplifiers relied upon vacuum tube circuitry, with the company adding solid-state models in the late 1960s.

They were made in three sizes, 18 (one 8-inch speaker), 110, and 115.

They included the Model 26 Deluxe, the Princeton, and the Professional.

The first cloth used was an off-white fabric, followed by a horizontal-stripe two-tone pattern, and finally a two-tone twill.

These early models are referred to as TV-Fronts due to the shape of the cabinet when viewed from above.

The Dual Pro was the first twin-speaker amplifier, and also the first to employ a finger-jointed pine cabinet and the amp with a top-facing control panel.

This has the benefit of providing ease of access to the inside while providing a strong top.

Fender later constructed them with narrow panel, in which all the panels have more or less the same width.

The brownface amps originally featured a dark maroon or oxblood grillcloth, which was changed to wheat in 1962-63.

The tolex on the earliest versions in this era was pinkish brown and rough textured.

There were only six amplifiers covered in tolex originally, the Professional Series: Bandmaster, Concert, Pro, Super, Twin (production halted Feb-May 1960, resumed as the blonde Twin) and Vibrasonic.

These were considered a step above the student models ( Champ, Harvard, Princeton ) which remained tweed-covered in 1960.

Beginning in mid to late 1961, Fender introduced another color combination: a smoother but still light brown tolex with a dark maroon or oxblood grillcloth.

By mid-1961, after this short-lived look, Fender was using the darker brown tolex which was a mainstay for many of the mid-1961 to 1963 amps.

Between 1961 and 1963, there were three different grillcloth colors: wheat, brown, and maroon and many tolex-grille color combinations are found suggesting that Fender was not reluctant to use up whatever stocks of materials were on hand.

Fender Twin Amp Tilt Angle