Agreed. I’ve said this too many times to count - headphones don’t make sound by themselves. It’s a system, and the limiting factor is the weakest link in the system. It could be the headphones, or the amp, or the source, or even the software. If, for example, I use my iPhone to Bluetooth spotify to my $185 Bluetooth receiver, hooked up to a five-figure system using $1,200 headphones, it’s still going to sound like Spotify via Bluetooth. If I switch to the same album on my SME turntable (or a naim CD player or, I’m certain, a proper hi-res streamer with a hi end dac) - and change nothing else - suddenly the boredom turns to magic. So saying he heard no difference between a mojo and an iPhone, without more, is meaningless. If all the mojo had was a lo res Spotify signal, then it couldn’t sound any better - indeed, it could sound worse because it would do a better job of revealing flaws upstream. Anyway, the point is, it’s all a system, and, for one example, once you damage the signal upstream, there’s no way to put it back with a better amp or dac or a pair of headphones. Add to that the fact that we all hear differently AND we all have different preferences and biases (since everything is a compromise and nothing is perfect, other than live, unamplified music occurring in a real space - IMHO, the only true ‘reference’), and opinions like the above one about the mojo sounding the same as an iPhone provides insufficient data to be meaningful.