z io ▁D ual ▁Sound ▁hum bu ck ers ▁in ▁the ▁middle ▁and ▁bridge ▁positions ▁with ▁a ▁Di Mar z io ▁SD S - 1 ▁single ▁co il ▁at ▁the ▁neck . ▁The ▁hum bu ck ers ▁were ▁switched ▁to ▁Dim arz io ▁Super ▁II ' s ▁in ▁ 1 9 8 2 . ▁Each ▁of ▁the ▁hum bu ck ers ▁is ▁equ ipped ▁with ▁a ▁co il ▁cut ▁switch . ▁ ▁In ▁summ ation , ▁there ▁is ▁one ▁ 5 ▁way ▁pick up ▁selector , ▁one ▁master ▁volume ▁control , ▁one ▁tone ▁control ▁which ▁affect s ▁the ▁neck ▁and ▁bridge ▁pick ups , ▁and ▁one ▁which ▁affect s ▁the ▁middle ▁pick up ▁as ▁well ▁as ▁three ▁mini ▁togg les , ▁two ▁for ▁the ▁co il - cut ▁of ▁the ▁bridge ▁and ▁middle ▁pick ups ▁respectively ▁and ▁one ▁for ▁the ▁on - board ▁effects ▁loop ▁on / off . ▁ ▁Dis position ▁After ▁Gar cia ' s ▁death , ▁a ▁dispute ▁arose ▁between ▁Ir win ▁and ▁the ▁Gr ateful ▁Dead ▁regarding ▁ownership ▁of ▁Gar cia ' s ▁Ir win ▁gu it ars . ▁In ▁his ▁will , ▁Gar cia ▁gave ▁possession ▁of ▁these ▁instruments ▁to ▁Ir win ; ▁the ▁Gr ateful ▁Dead ▁challeng ed ▁whether ▁Gar cia ▁had ▁the ▁right ▁to ▁convey ▁title ▁and ▁ins isted ▁that ▁the ▁band ▁owned ▁the ▁instruments . ▁The ▁parties ▁reached ▁a ▁settlement ▁where ▁Ir win ▁was ▁awarded ▁Gar cia ' s ▁more ▁famous ▁instruments , ▁and ▁the ▁Gr ateful ▁Dead ▁took ▁possession ▁of ▁the ▁majority ▁of ▁the