Crap website, and I don't even know if they're still in business but I would reach out and inquire. I own a pair of the 1.6 WC and will never part with them. Best bookshelf speakers I've ever owned. If you want detail PLUS warmth...the wool carbon cones are absolutely brilliant.
To put in perspective, I also own ProAc Tablette 10s, which are amazing in their own right, but the Source speakers are my go-to's. Fuller, warmer, more relaxed - yet absolutely spot on with details.