Finished with Tung Oil. Then a bit of polyurethane. Sound was excellent. Midrange had supreme clarity and ease (no xover in the way). Slight upperbass funkiness (horn sound coming through). Surprisingly good midbass for driver size. Driver has 6k peak that was too fatiguing for me; ultimately had to use a touch of EQ. Good (not great) treble extension. I very much miss the midrange coherence and plankton. Something I haven't been able to replicate with my multi-way projects since, or most headphones for that matter.