This　paper　describes　a　design　approach　of　Ambisonic　reproduction　system　based　on　dynamic　gain　parameters　(DGP).　In　the　conventional　approaches,　the　fixed　gain　parameters　are　often　optimized　to　minimize　the　overall　objective　function　for　whole　360°　sound　stage.　The　proposed　approach　has　an　advantage　that　the　gain　parameters　vary　with　angles　of　source　objects.　The　problem　of　optimization　tradeoff　among　different　angles　is　overcome　by　DGP,　which　achieves　an　optimal　solution　in　each　position.　Source　localizations　of　the　B-Format　signals　were　estimated　in　frequency　bands　in　order　to　match　the　corresponding　gain　parameters.　For　the　synthesized　signals,　the　process　was　simplified　by　the　given　spatial　information.　Using　the　head-related　transfer　function　(HRTF)　analysis,　the　proposed　approach　was　found　to　be　significantly　better　than　reference　approaches　in　interaural　time　difference　(ITD)　and　interaural　level　difference　(ILD).　©　2014　IEEE.