I once had a demo of Casino Royale on Blu-ray (yep, there's a theme here...) on the BV4-65 with the BL5s, in the Bath store.
In the part where there is a big explosion on the construction site, near the start of the film, the Bath store nearly exploded. People on the street, looking in to the store, wondered if something had exploded in the store, it was that loud. The floor shook and you could feel the vibrations metres away.
That's the power of the BL5s!