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The Alice 505 Baxandall stereo EQ like most equalizers  were first used in the movie industry in the USA to solve a serious problem; microphone placement was difficult and the dialogue sounds achieved varied significantly, so they needed to design electronic circuits that would equalize the sounds from different microphones so that they all sounded the same. The name has stuck and now we have complex digital equalizers that engineers use for effect. The original purpose was to sweeten the sound.

The equalizer circuits were originally designed by Peter J Baxandall in the 1950’s as part of a competition where he won a wrist watch. Variations of his designs have been used by nearly all broadcasters and HiFi manufacturers ever since. Ted Fletchers variations incorporate the original class A circuitry and modifications to the curve have been shaped specifically for sweetening of final masters.

Frequency response: 20Hz to 20KHz Line input: 10KHz current-mode transformer balanced Gain: Unity EQ – high: +/- 12dB with shelving at 10kHz EQ – mids: +/- 12dB with shelving at 1600Hz EQ – lows: +/- 12dB with shelving at 100Hz Relative input noise: better than -90dB Harmonic distortion: <0.05% Crosstalk: better than -50dB Maximum output: +21dBu
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Alice 505


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STUDIO Alice 505