Again IMO only I build components, DAC (DHT), preamp DHT, amp and speakers. I have built and repaired almost every major brand over the past 20 years. The power supplies to my DAC & preamp are 35 lbs., and use high quality parts. So based on me being able to play around with all kinds of components and build my own and modify others, the weakest link is the source, again IMO only based on being able to try so many different components in my system and others. IMO once you get a great source then you can really hear into a system. Yeah everything has a place but to me the source makes the biggest difference. It was hard for me to understand this until I had the opportunity to really hear so many components in my system. The source is what provides the soundstage, dynamics, tone, did I mention tone, separation, etc.
Happy Listening, again IMO.