Anyone has heard the Bel Canto REFLink Asynchronou

The uLink and REFLink reduce jitter to 50 femtoseconds.

This is not true. The value you are quoting is a clock (crystal oscilator) jitter. The clock is just a part of a greater whole, chence the total jitter, as measured at SPDIF out will be much greater.

The converter with the lowest measured jitter at the SPDIF out I have seen is the Audiophilleo - 2ps or thereabouts.

The problem in measuring jitter on such a low level is the cost of the equipment needed, which can easily exceed $100k. Very, version few hifi companies even have such an equipment.

That said, the BelCanto REFLink seems to be a very well engineered product. It uses the ultra low phase noise clocks, made by Crystek. The first converter that used those were BADA Alpha USB, which is even more elaborate in trerms of measures taken to isolate the computer from the DAC. The downside - it costs $300 more.

I highly recommend anyone interested in top quality converter to include the BADA Alpha USB on his short list.

Scottmac62 - your comments are very interesting. Two people at Computer Audiophile came to the oposite conclusions.

User Blake had written:

"I rank the converters as follows:

1. BADA using aes/ebu output.
2. BADA using s/pdif output.
3. Tie between the Legato and REFLink using aes/ebu
4. REFLink s/pdif
5. uLink with iFi iUSB
6. uLink without iFi iUSB

The BADA with aes/ebu really stands out from the rest and is the clear, undisputed sonic champion by a very noticeable margin."

That was from former mLink and uLink owner, who initally wanted to upgrade to the REFLink.

Original post

User guydebord also came to similar conclusion, where he found the Berkeley Alpha USB to be superior to REFLink. He said: 'The Berkeley Alpha USB interface is in a league by itself, I just called the dealer to let him know that Im keeping it.' He ended up getting one as well.

Original post

It seems that there is some special synergy in case of Bel Canto REFLink feeding Bel Canto 3.5 DAC via the ST connection.