I'm using the MUTEC REF10 as an external master clock for two SOtM network switches. About a month or two ago, unbeknownst to me, a BNC cable detached from one of the switches. Suddenly, something didn't sound right - there was a reduction in clarity and tonal accuracy. I must have spent 20 minutes trying to figure out what was wrong before I noticed the detached cable.

It was then that I decided to upgrade the REF10 to the REF10 SE120. As a result, I'm selling this amazing REF10, about a year old and in excellent condition, for $1200 off the list price.

The REF10 is rarely listed because it's in demand for both studios and home audio and isn't usually discounted.
Per the above, I can attest to its excellence and impact.
 
Additional info:
https://audiobacon.net/2018/10/25/mutec-ref-10-master-clock-the-digital-audios-heartbeat/
https://www.mutec-net.com/product_ref_10.php?pk_campaign=hifistatement_august18#description

I'll pay for shipping to the continental US. The buyer is responsible for extra insurance and any PayPal charges. However, I will accept PayPal friends and family.