The reason is: 1, the projector has no external function. 2, the general computer speakers, on the one hand, the sound is small, on the other hand, the speaker effect is poor. 3. When connecting, try to connect the computer instead of the projection. The computer decoding effect is good. 4. When purchasing, if conditions permit, it is recommended to buy a power amplifier, preferably to control projection, influence or other equipment or microphones.

The projector can be connected to stereo as follows: 1. First, you need to connect the speakers to the projector. 2. Insert one end of the prepared cable into the video jack on the back of the audio. 3. At this time, connect one end of the connecting cable to the audio output interface of the projector. 4. If both projector and audio support Bluetooth connection, you can connect via Bluetooth. Plug one end into the audio output of the projector and the other end into the Bluetooth transmitter.