I don't have solid answers for you, but I do have an experience to share which I believe is a partial answer.
I wanted a better dac that got me into better ES9018 chip. I purchased a kit and did all the work. After speaking to an old friend who is fairly well known years gone by as a competent designer, he convinced me that done right, there was nothing wrong with a switching supply. Being a beyond frugal, okay, cheap person, I had found a TV/DVD switching power supply that had the exact voltages that I needed for my dac. I purchased this, put it in, fired it up.... IT WORKS... Fast, smooth, but had a glare that I couldn't deal with, waited for weeks to break in. Still glare. Took it to my buddies house, he took measurements, measured again and ended up building a filter network for the power supply. Wholey Moley what a difference. Glare is gone, detail improved, weight/authority. I became a happy camper quickly.
Another friend purchased a Pass/First watt clone that Nelson offered up on DIY.com.. My buddy told him the same thing... Again, DONE PROPERLY a switching supply is fine, even on a traditional amplifier. In his case, he had already purchased 2 transformers and ran that direction. I'm a speaker guy, but I'm sure one of the amp guys out there will chime in and tell you why.
I wanted a better dac that got me into better ES9018 chip. I purchased a kit and did all the work. After speaking to an old friend who is fairly well known years gone by as a competent designer, he convinced me that done right, there was nothing wrong with a switching supply. Being a beyond frugal, okay, cheap person, I had found a TV/DVD switching power supply that had the exact voltages that I needed for my dac. I purchased this, put it in, fired it up.... IT WORKS... Fast, smooth, but had a glare that I couldn't deal with, waited for weeks to break in. Still glare. Took it to my buddies house, he took measurements, measured again and ended up building a filter network for the power supply. Wholey Moley what a difference. Glare is gone, detail improved, weight/authority. I became a happy camper quickly.
Another friend purchased a Pass/First watt clone that Nelson offered up on DIY.com.. My buddy told him the same thing... Again, DONE PROPERLY a switching supply is fine, even on a traditional amplifier. In his case, he had already purchased 2 transformers and ran that direction. I'm a speaker guy, but I'm sure one of the amp guys out there will chime in and tell you why.