We've received a number of reports of issues with Lavry units not working with Red Range interfaces over S/PDIF. Users have reported that their Red doesn't receive any signal from the S/PDIF Out on the Lavry unit and is unable to lock to the Lavry at all over S/PDIF.
Despite a lot of investigation on our side we haven't been able to determine what the root cause of this issue is.
This being the case, regretfully we cannot recommend the use of Lavry converters with our Red Range interfaces.