Sorry but kenwood, alpine and pioneer do not make anything comparable to brax, that’s just not accurate at all, I know we disagree on various things, but if you genuinely believe what you just wrote then you know nothing about amplifier topologyTry not to get caught up in the snake oil. Good amps are not difficult to find. Sure, there are crappy amps out there, but the majority of the good brands (Alpine, Kenwood, Pioneer, etc.) all make very good amps that will sound every bit as good as the luxury amps like Brax.
DSPs will be very important, FAR more important than the difference between a Kenwood Ecelon amp and a Brax amp.
Tell him he can buy a 500 dollar receiver and replace his ati hypex amplifiers as all amps sound the same as well