What made me suspicious was their story: They're over supplied for an installation job. Where were their tools? Where's the cables? No connectors.
No ladders.
All they had were nice looking boxes. I felt the weight of one of the speaker boxes. Very light. No way that the contents could handle the specified power.
They were lying. What other fibs had they been trying to tell me? That's why I decided no way and checked with some reputable retailers. Also I had never heard of the brand, and I have had an interest in up market audio systems for 45 years.