Facten and Tvad. I sent mine back after the trial period and I dont recall whether they were directionally marked. If they were not, there is a good chance I used them in different directions as I removed them a few times during evaluation.
Many people seem to enjoy them. I just found them too hard, bright and forward in my system. They may be right in other systems.
Many people seem to enjoy them. I just found them too hard, bright and forward in my system. They may be right in other systems.