ITEM NAME:XH-M253 TDA8954TH Core BTL Mode HIFI Class 420W High Power Mono Digital 3C.â‘ With the new original TDA8954TH core technology, the BTL bridge circuit is more efficient. Kernel chip: TDA8954TH. 1 Pcs 420W TDA8954TH Digital Audio power Amplifier Board. Output power: 420W. Number of channels: mono.