you need to use headphones for i-doser to work, however, if you were to convert your speakers into over-sized headphones, I'd say you could probably use them. them kevlar speakers have such a nice quality

I'm only guessing here, but I'd say earphones may work better, because some can also act as ear plugs to an extent and help block out any outside noises which may be distractions. or does i-doser need to be run through headphones to be a bit further back in the ear cavity to aid with the resonating ...