Is my Audio Alchemy DAC outdated?

Yes, but it’s still can be of value. I have one also and used it for years. It was replaced 6 years ago kept as a back-up along with my beat up old Magnavox 560 cdp. A few months ago my current disc player needed repairs. Out it came and did a great job while the other was getting fixed. It can also be used with Digital Out of a computer.

I recently bought an Oppo DVD player to use solely in 2-channel audio system. I knew something was lacking. I then purchased the PS Audio digital link III DAC. All I can say is WOW. What a difference. Outstanding DAC for the money.

I would give a Scott Nixon Tube Dac a listen. There's one on AG right now. It is a very musical DAC and you would have to spend much more to get better sound. Changing tubes will give you a different sound. Addressing cables on the SNTD will change the sound too.