Power conditioner

here's the AI analysis: 

Nordost QBase Mk III

• Passive
• No filtering
• No protection
• No isolation
• No noise reduction
• Requires add‑on modules to do anything meaningful

Between the two, select the Audioquest.  It offers these features:

• Full transformer‑based conditioner
• Heavy noise reduction
• Surge protection
• High‑current outlets
• Real AC treatment

With that said, you may want to consider the Furman Reference 15i which is better than both.  It offersthese features,  it's where I spent my money and it's less expensive:

• Balanced power (±60V) dramatically lowers noise floor for analog and tube gear
• SMP/EVS gives the best surge protection in the industry
• LiFT filtering is neutral and non‑compressive
• No transformer buzz issues (unlike some Niagara units)
• Zero drama with high‑current amps
• Costs far less than the Niagara 5000

@audio-b-dog 

I think it's more complicated with an asynchronus DAC. I don't think my CD player's clock is used. I heard that from my dealer, but I haven't had a chance to check out all the technical stuff. 

If you can budget one of the Berkeley Audio Design's Alpha USB models + a quality AES/EBU cable and quality USB cable, then run your questions passed a Berkeley engineer.

They would know if there are streamers or DACs that are not compatible with their Alpha USB re-clockers.

I have never tried to contact them.  So I do not know if they are reachable or if they will respond to inquiries.  But I think that they would want to help a new customer, and you would get a real answer (not just more questions).

Plixir 

@bosssound 

I've had similar positive experiences with the Berkely Alpha Design Alpha USB interface. Plan to post about it separately when I have time. Will provide link in this thread when I do.

Is this still on your radar?

@seymour-krelborn

Yes. I posted about BAD Alpha USB here. Cheers.