Dallas Rangemaster Treble Booster
The Dallas Rangemaster Treble Booster is a 1965 desktop effects unit made for guitarists in the 1960s. Its function was two-fold: to increase the signal strength of the guitar going into the amplifier, and to increase tones at the high end of the spectrum (a treble booster). The need for a treble booster arose in the mid-1960s, as British tube amplifiers such as the Vox AC30 or Marshall JTM45 tended to produce a slightly dark, muddy sound when overdriven, particularly when used with humbucking pickups. A pre-amplifier that also boosted treble proved a solution. Additionally, the vintage components in the Rangemaster circuitry could add characteristic distortion and overtones to color the guitar sound, much in the way of the more modern overdrive pedals. The Rangemaster Treble Booster was first made in the 1965 by London company Dallas Musical Ltd., incorporated in 1959. The unit is simple and consists of a grey folded metal casing with an on/off switch, a potentiometer controlling the boost setting, and in- and output jacks. It was designed to sit on top of an amplifier rather than on the floor, where most effects units live.