Yes im running the hds208s. Im running them at 0.5 on a 3500, but set a little below full output because they cant handle the power mechanically. (Twice ive gotten the coil to hit the back plate). I dont use them for sq at all, theyd be terrible for that. I went to 8s to save space. It might be loud to the average person, but its about as quiet a system as ive had in years. Its maybe around 140db. I was hoping after break in theyd be louder, but to no avail.
The SA 8v2 I had before are much better. At some point this year ill probably swap out to x8's