▁h alls , ▁the at res , ▁opera ▁houses , ▁broadcast ▁and ▁everything ▁from ▁the ▁small ▁conference ▁rooms ▁to ▁the ▁large - scale ▁stad iums . ▁ ▁Their ▁claimed ▁unique ▁sales ▁proposition ▁is ▁that ▁they ▁augment ▁the ▁volume , ▁or ▁hear ability , ▁of ▁a ▁speaker ▁or ▁music ian , ▁but ▁not ▁the ▁quality ▁of ▁the ▁sound . ▁ ▁They ▁supposed ly ▁achieve ▁this ▁flat ▁response ▁through ▁digital ▁signal ▁processing ▁( D SP ) ▁so ▁that ▁profile ▁changes ▁introduced ▁by ▁loud ▁speak ers ▁and ▁other ▁audio ▁components ▁are ▁compens ated ▁for ▁and ▁thus ▁elimin ated . ▁ ▁History ▁▁ 1 9 8 1 - 1 9 9 3 ▁April ▁ 1 8 , ▁ 1 9 8 1 ▁- ▁After ▁being ▁founded ▁in ▁a ▁gar age ▁d & b ▁audi ote chn ik ▁is ▁registered ▁as ▁a ▁business ▁in ▁K orb ▁near ▁Stuttgart ▁by ▁J ürgen ▁Da ub ert ▁and ▁R olf ▁Bel z . ▁ 1 9 8 5 ▁- ▁The ▁first ▁complete ▁product ▁line ▁is ▁put ▁on ▁the ▁market , ▁F 1 / F 2 / B 1 . ▁ 1 9 8 8 ▁- ▁The ▁ 1 2 2 0 ▁system ▁acts ▁as ▁a ▁reference ▁for ▁sound ▁systems ▁in ▁the ▁world ▁of ▁theatre ▁and ▁opera , ▁which ▁also ▁mark ▁d & b ' s ▁entry ▁into ▁the ▁installation ▁market . ▁ 1 9 8 9 ▁- ▁The ▁company ▁moves ▁to ▁Back n ang . ▁Their ▁first ▁office ▁is ▁opened ▁abroad ▁in ▁Great ▁Britain ▁and ▁Sc and in avia . ▁▁