Mike is absolutely right. Nordost dealer here. The valhalla's will reveal yours systems weakness and strengths. They are not edgy. If so, it's probably your gear or another variable in your system. We have purchased the Vidar Machine and I always burn in every Nordost cable for 4-5 days. The Vidar puts an equivalent of 100 years of actual playtime, according to Nordost. The audible difference is definitely noticeable. In fact, for fun I often play back my customers cables after I've burned them in and compare them to a non-burned in set just to show them the difference that the Vidar makes. And the machine works with all cables! Now you should forget about Valhalla and come hear the Odin!! Check Nordost to find your Odin dealer on the west coast.
Happy Listening
Happy Listening