Well my 'emergency' tempest arrived; my silver tempest with dual preouts should arrive in a few weeks. This thing sounds sooooo smooth! Never before have harmonicas actually well, sounded like a harmonica before, violins, you can hear the bow across the strings - before, both these sounds were very synthesizer-like. The soundstage is much wider - more realistic - and there is better integration of the lower mids and base. A lot more power. Of course, this is the first preamp I've really had, before this, I had the Onix A120 and the HK and a Sony surround thing.
A few questions to longer time owners.. how much did you notice the tempest change over time? It sounds so good right now, I hope it doesn't deviate too much from this lush, smooooooooooth sound... very addicting...