The individual cubes boxes have been replaced since the small supplied but were a bit tinny over time through greater Magnat speakers (for Center and Rear) and Canton FRONT speakers. Especially this is of course noticed in spoken scenes from the Center. Despite all this, I would give the cube boxes 3.5 stars.
The subwoofer contrast provides a clean, crisp and very powerful bass. I take it very pure and true would have difficulty to locate the exact direction! For fine tuning you can even adjust the "Phase" and "use frequency". Full 5 stars for the subwoofer!
Since I have received the entire system to a hammer price (for me 6 stars) and especially the subwoofer until today makes excellent services, manages the overall standings despite only satisfying cube boxes on a total of 5 stars!