A USB power amplified trumpet connecting device comprises a digital
conversion chip and a power amplifier chip on a circuit board; an input
connected to a USB port as an input; and an output. The output is
connected to one of an earphone, a trumpet, or an optical fiber terminal.
The output seat is an optical output seat which is connected to an
optical fiber terminal for further connecting to a decoding amplifier and
then to a trumpet. Another the output can be an output wire; and the
output wire is connected to a trumpet. The output is an output seat; and
the output seat is able to output cable signals and optical fiber signals
for being connected to one of an earphone, a trumpet and an optical fiber
terminal.
