Which USB reclocker is as good as the Innuos Phoenix USB?

@jorjlien 

We won't really know without a comparison :).

With the obvious deficiencies of USB as an audio connection one cannot but wonder why better connections have largely been ignored by server engineers. Might that relate to the ability of asynchronous USB to slave the server‘s clock to the dac?  Hard to explain given otherwise clearly superior characteristics of I2S, AES/EBU and BNC. Not  even to mention fibre…

@antigrunge2 those deficiencies are ones you believe but they are totally unfounded. There can be groundloops when connected to lower featured DACs, but they are easily eliminated for a few hundred. It's far better to send data than data and clock.

@antigrunge2

Other than the obvious advantage of asynchronous connection you pointed out, I can think of couple of reasons why USB still considered a better option for servers. There is no standardized connector with i2S protocol, some uses RJ45 and others using HDMI. Both AES and BNC (SPDIF) has sample rate limitations (upto 192kHz) unless you’re using dual AES outputs which is very rare. Not to mention jitter which if not addressed properly can become a detriment to a bitstream.

IME, The Ethernet based DAC/Server all in one device is the way to future. The brilliant designers at Merging Technologies and Aurender has proven that you don’t need an external or separate server with ginormous processing power to run Roon Core or to run your favourite player software to hear music files. The whole separate server from end point (renderer) is a propaganda by ROON to fool people into spending money and jumping through hoops with tweaking gadgets to get data stream from Server to End Point (player or renderer). Just think about it, how many folks are benefiting from this grand scheme of running a Roon core on a separate server.

@lalitk

Substantially in agreement with you. Ideally you‘d have an integrated Server/Dac with an integrated analogue attenuator and a very high quality clock. Given the output voltage of normal dacs, I don‘t believe there is a point for a pre unless the power amp has unusually high input impedance. The point about the clock is very material: I have had very major benefit from using a LHY Audio Ocxo switch AND a 10m controlled Etherregen to clean up the Ethernet signal into the server as well as  reclocking the actual DAC conversion.

My comment on the vagaries of USB relates both to noise from the contained 5V DC line and to ground level and RFI/EMI incursions. Many dacs to this day don‘t have galvanically isolated USB inputs (I use Intona Isolator and cables) and using dual USB cables with a separate 5v LPS again has yielded major benefita