So we didn’t skimp on the power supply or the chassis. We just built it to proper engineering standards without cutting corners. IMO one of the reasons you see such variable comments about how Hypex and Purifi amps sound is because of how they are executed.
Thanks for the insight. Indeed, those marketing Hypex, Purifi, and several other class d amps using the modules of others can "tune" the sound through the input buffer op amp choices. I suppose it is a clever marketing technique to appeal to different tastes, rather than offering any color the customer wants, as long as it’s black. Of course most of them degrade the performance of the amp modules to some extent, but as we can see here, there are those who aren’t concerned with high fidelity to the input signal. Other such differences, like type and style of case, input mains filters, mounting configurations, etc., surely do vary widely, from head scratching to immaculate. No doubt these differences play some role in the final result as well-how much, I do not know.
No doubt with the weight of the transformer you would need a stout case. I suppose that can certainly add to the costs, though it is hard as a consumer driven by performance to justify spending 3-4 times as much as a competing product for things like a dealer network and a stouter case, neither of which in my opinion makes it "go faster". You might consider using a smps, a lighter, cheaper case, and offer your amp for half or 1/3 the price. Surely there is a sizeable market at the lower price point.
Again, appreciate the reply.