I am absolutely positive that Peter Thomas knows how to build loudspeakers. I am also positive that what they sell is a tuned down version of what can be achieved.
When designing commercially there is always the question: is the quality improvement on par with the price increase? Are people prepared to pay the extra dollar/pound/euro for the better product?
We all know that it takes a lot of money to climb up the quality ladder. Bryston amps can be improved as well, it just takes expensive components and as a result they will me (even) more expensive, which will make them less interesting for customers. But if anyone is willing to invest in it, it can be done.
A number of companies have tried, at least for a special line or a single model, taking a no-holds-barred / sky's-the-limit (skunk works) engineering approach, with the objective of raising the bar on ultimate performance and using the learnings to better their commercial product lines - e.g. KEF Blade, Totem One etc. Formula 1 racing is an example of this applied to non-audio products.
Bryston claims it consistently takes this approach with their actual commerical product line - in other words, they regularly try new components/designs (including upscale components) and implement anything they find (design and/or parts) that provides an evolutionary increase in performance, while maintaining reliability (20+yr). Whether this is irrespective of the price of the component(s) and/or technology is another question - which I'm not 100% sure of. In other words, if there is a way to consistently increase the performance of it's amplifiers in a "real" way and do so while maintaining reliability they would do it - according to their company motto.
Interesting enough - I have not been able to find a legitamate "mod" company take on a project to mod. Bryston ampliers (adding exotic parts or re-designs) that improve performance. Perhaps, it's because to consistently improve performance it would require a substantial redesign - perhaps that would be a whole different product?? And such an improved design is not yet know to Bryston itself, otherwise, it would have been implemented??
Anonamemouse - what changes in parts / design do you claim would definitly increase the performance of it's amplifiers - in a "real" sense, while not compromising their reliability? If this is known to you - would you mod your own Bryston amp or contract someone to do it for you? I'm just curious about your theory.