Got them today and had a session of comparing to my jh13 and cable. They're really good as is with the silver cable supplied. If that's stock, they got it right with the cable choice. The 1+2 cable was worse than stock on the JH13s and made the preference more debatable. If using both with their stock cables, the JH13 is a clear step up if not a huge one. It's more evenly balanced, focused, solid and natural with slightly better res. For me, it does everything better but mostly marginally so. There's just an overall rightness about it. The JH cable was also clearly worse on the 1+2. My guess is that the 1+2 cable is SPC but don't know and it don't matter. It's a great match for the 1+2.
The 1+2 does sound surprisingly integrated with no obvious timing issues. The bass is a couple DB up but blends well to the mids which are marginally recessed. The cable balance compensates nicely. The highs have some sparkle but not too bright. Just a bit of etch but better refinement than other single TWFKs. As delivered, they offer the best universal I've heard so far and while I don't like any range as much as my 13s, they are all close and the bass is very similar other than slightly higher in amplitude which others will prefer. They are surprisingly musical, well voiced, dynamic, refined and extended. They have a touch extra bass that works well in the package and some minor tonal aberrations that aren't harmful and part of the compromise involved with every universal I've experienced. The highs are where they need to be to maintain res while not too hot. Nicely done.
I don't have a real negative thing to say about them. Other than preference or my personal fav custom, you can't go wrong and they will have better resale and no fit issues like customs. Easier to take in and out and less heartache if all doesn't go well etc. Kudos to Gavin.