This might sound dumb and amateurish, but I get a great, and surprisingly loud and useable sound, out of my Yamaha THR10 on the Bass setting. Weighs nothing.
Start with both volume pots full up then pluck a string and turn the neck volume pot down very slightly until you hear the mids becoming more present. Turning the tone back a little might sound okay too. Both volumes full up scoops the mids a lot.
^^^^This.