I've got a dilemma and someone must have an answer... I play with a uke group, about 20 instruments all unamplified. I use a Peavey Microbass. It's got a headphone out and a speaker out, but both defeat the main speaker when you plug in. I want to wear headphones while playing so I could hear myself better without turning up the volume. Is there some box or something which will let me run headphones while keeping the amp speaker on? Thanks and Happy New Year!