From a specifications point of view, the JBL sub will be an active sub and will perform fine. the 675 should be fine to drive the bose cubes - am not asking for the model since bose doesnt give specs for it. you will have to use your ears and intuition to balance it. adjust the sub volume to suit the cubes. and also ensure that at what volume level does the bose flatten out and dont drive it beyond that. apart from that in my experience yamaha and bose pair well