Firewire immune to jitter?


I wonder if a firewire connected DAC is as problematic at rejecting jitter as a USB is and if there are reclockers available for firewire.

I currently have a MacBook pro running Audirvana+ feeding a Weiss DAC202 to it’s firewire input with satisfying sonic results. I really like the DAC202. Firewire cable is an Audiquest carbon.
But, would I be best to use the USB out of the Mac using a USB to S/PDIF converter into the rca input of the Weiss. I use to have one of those (a Wavelength I think) feeding an ARC DAC7 that could not process HR files through its USB input. I have since sold the DAC7 and gotten the Weiss.

I was also considering replacing the Mac with an Aurender N100h (Or similar) but many people are telling me that I must be prepared to spend mega bucks to better my current digital set up. 
Cost of an Aurender N100h or N100c
Cost of a new DAC (USB capable) but not necessary if using a N100c 
Cost of a reclocker (Synchromesh or similar)
Cost of USB, S/PDIF/BNC cables

I barely have enough money for an Aurender let alone all the peripherals mentioned above.

Note, I am not into MQA and DSD and will never be. If I want better sound than 16/44 or 24/96 I just put a vinyl on my $30k analog front end. 

Any thoughts much appreciated. And if the best solution is to leave everything as is then that’s cool too.



smoffatt

Showing 2 responses by shadorne

I am not sure why you think your DAC202 has a problem. This is one of the best DACs on the market probably only superseded by the latest Weiss. Weiss has excellent jitter rejection so why are you worried?
@smoffatt 

This is what JA of Stereophile says


“Finally, the Weiss DAC202 offers the best rejection of datastream jitter I have encountered. I have shown the spectrum of the processor's output when fed FireWire data representing 16- and 24-bit versions of the J-Test signal (fig.12). The AES/EBU and TosLink spectra are identical. With 16-bit data (cyan and magenta traces), the harmonics of the low-frequency, LSB-level squarewave were at the residual level, and were not accentuated or modified by the DAC202. With 24-bit data (blue, red), all that is visible is the central spike of the Fs/4 tone, this sharply reproduced, and with very little spectral spreading at its base. The jitter was too low for the Miller Analyzer to measure. Again: Wow!
Read more at https://www.stereophile.com/content/weiss-dac202-firewire-da-converter-measurements#DuQYUGqLYrkoyitU...

Daniel Weiss prefers FireWire as the communications protocol is less likely to induce LIM due to the way it streams data.

I think you have nothing to worry about but if you find buying more gear or extra cables will alleviate your fears then why not....