Hi. I have a new no-name brand projector. It has no headphone jack. I want to just use the RCA output to run a Blue-Tooth speaker (I have everything i need to do this). But the sound keeps playing from the Projector speaker. I would prefer to turn the volume down on the projector speaker- but when i do this the Blue-Tooth speaker volume also goes down... is there an easy way to disconnect the internal Projector speaker so i can just use the RCA output for sound? thanks in advance.