1969 Altec Acoustic-Voicing Ad

An acoustically controlled studio environment still threw wicked curves at Empire Photosound Inc., Minneapolis.
But Acousta-Voicing straightened things out.

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Acousta-Voicing’ is a revolutionary equalization system developed by Altec.
It is the only system using calibrated, fully-adjustable, critical bandwidth, band rejection filters. What’s more, the Acousta-Voicing method is unique in its ability to insure integrity of transient response in the total system after equalization. The results of Acousta-Voicing are positive and dramatic.