yonnie 兄
i heard a1 before , the decode part of course z7 will win , but did u try the cd part ,its possible that z7 will lose compare to a1 .try it if u have time , because my friend have a1 as well and we did compare my 3800. and also cakecake hing was right , the eq of yamaha was 無限可能, try it for sure !